Document:

Pass Through Trust Agreement

 Exhibit 4.1 

EXECUTION VERSION 
  

 
 PASS THROUGH TRUST AGREEMENT 

Dated as of August 11, 2015 

Between 
 SPIRIT AIRLINES, INC.

 and 
 WILMINGTON TRUST,
NATIONAL ASSOCIATION, 
 as Trustee 
  

 

 TABLE OF CONTENTS 
  

							
	 	 	 	  	Page	 
		
	 ARTICLE I DEFINITIONS
	  	 	2	  
			
	 Section 1.01.
	 	 Definitions
	  	 	2	  
			
	 Section 1.02.
	 	 Compliance Certificates and Opinions
	  	 	9	  
			
	 Section 1.03.
	 	 Form of Documents Delivered to Trustee
	  	 	10	  
			
	 Section 1.04.
	 	 Directions of Certificateholders
	  	 	10	  
		
	 ARTICLE II ORIGINAL ISSUANCE OF CERTIFICATES: ACQUISITION OF TRUST PROPERTY
	  	 	11	  
			
	 Section 2.01.
	 	 Amount Unlimited; Issuable in Series
	  	 	11	  
			
	 Section 2.02.
	 	 Acquisition of Equipment Notes
	  	 	13	  
			
	 Section 2.03.
	 	 Acceptance by Trustee
	  	 	15	  
			
	 Section 2.04.
	 	 Limitation of Powers
	  	 	15	  
		
	 ARTICLE III THE CERTIFICATES
	  	 	15	  
			
	 Section 3.01.
	 	 Form, Denomination and Execution of Certificates
	  	 	15	  
			
	 Section 3.02.
	 	 Authentication of Certificates
	  	 	16	  
			
	 Section 3.03.
	 	 Temporary Certificates
	  	 	16	  
			
	 Section 3.04.
	 	 Transfer and Exchange
	  	 	16	  
			
	 Section 3.05.
	 	 Book-Entry and Definitive Certificates
	  	 	17	  
			
	 Section 3.06.
	 	 Mutilated, Destroyed, Lost or Stolen Certificates
	  	 	19	  
			
	 Section 3.07.
	 	 Persons Deemed Owners
	  	 	19	  
			
	 Section 3.08.
	 	 Cancellation
	  	 	19	  
			
	 Section 3.09.
	 	 Limitation of Liability for Payments
	  	 	19	  
		
	 ARTICLE IV DISTRIBUTIONS; STATEMENTS TO CERTIFICATEHOLDERS
	  	 	20	  
			
	 Section 4.01.
	 	 Certificate Account and Special Payments Account
	  	 	20	  
			
	 Section 4.02.
	 	 Distributions from Certificate Account and Special Payments Account
	  	 	20	  

  
 i 

							
	 Section 4.03.
	 	 Statements to Certificateholders
	  	 	22	  
			
	 Section 4.04.
	 	 Investment of Special Payment Moneys
	  	 	23	  
		
	 ARTICLE V THE COMPANY
	  	 	23	  
			
	 Section 5.01.
	 	 Maintenance of Corporate Existence
	  	 	23	  
			
	 Section 5.02.
	 	 Consolidation, Merger, Etc
	  	 	23	  
		
	 ARTICLE VI DEFAULT
	  	 	24	  
			
	 Section 6.01.
	 	 Events of Default
	  	 	24	  
			
	 Section 6.02.
	 	 Incidents of Sale of Equipment Notes
	  	 	25	  
			
	 Section 6.03.
	 	 Judicial Proceedings Instituted by Trustee; Trustee May Bring Suit
	  	 	25	  
			
	 Section 6.04.
	 	 Control by Certificateholders
	  	 	26	  
			
	 Section 6.05.
	 	 Waiver of Past Defaults
	  	 	26	  
			
	 Section 6.06.
	 	 Right of Certificateholders to Receive Payments Not to Be Impaired
	  	 	27	  
			
	 Section 6.07.
	 	 Certificateholders May Not Bring Suit Except Under Certain Conditions
	  	 	27	  
			
	 Section 6.08.
	 	 Remedies Cumulative
	  	 	27	  
			
	 Section 6.09.
	 	 Undertaking for Costs
	  	 	28	  
		
	 ARTICLE VII THE TRUSTEE
	  	 	28	  
			
	 Section 7.01.
	 	 Certain Duties and Responsibilities
	  	 	28	  
			
	 Section 7.02.
	 	 Notice of Defaults
	  	 	28	  
			
	 Section 7.03.
	 	 Certain Rights of Trustee
	  	 	29	  
			
	 Section 7.04.
	 	 Not Responsible for Recitals or Issuance of Certificates
	  	 	30	  
			
	 Section 7.05.
	 	 May Hold Certificates
	  	 	30	  
			
	 Section 7.06.
	 	 Money Held in Trust
	  	 	30	  
			
	 Section 7.07.
	 	 Compensation and Reimbursement
	  	 	30	  
			
	 Section 7.08.
	 	 Corporate Trustee Required; Eligibility
	  	 	31	  
			
	 Section 7.09.
	 	 Resignation and Removal; Appointment of Successor
	  	 	31	  
			
	 Section 7.10.
	 	 Acceptance of Appointment by Successor
	  	 	32	  

  
 ii 

							
	 Section 7.11.
	 	 Merger, Conversion, Consolidation or Succession to Business
	  	 	33	  
			
	 Section 7.12.
	 	 Maintenance of Agencies
	  	 	33	  
			
	 Section 7.13.
	 	 Money for Certificate Payments to Be Held in Trust
	  	 	34	  
			
	 Section 7.14.
	 	 Registration of Equipment Notes in Trustee’s Name
	  	 	35	  
			
	 Section 7.15.
	 	 Representations and Warranties of Trustee
	  	 	35	  
			
	 Section 7.16.
	 	 Withholding Taxes; Information Reporting
	  	 	36	  
			
	 Section 7.17.
	 	 Trustee’s Liens
	  	 	36	  
			
	 Section 7.18.
	 	 Preferential Collection of Claims
	  	 	36	  
		
	 ARTICLE VIII CERTIFICATEHOLDERS’ LISTS AND REPORTS BY TRUSTEE
	  	 	36	  
			
	 Section 8.01.
	 	 The Company to Furnish Trustee with Names and Addresses of Certificateholders
	  	 	36	  
			
	 Section 8.02.
	 	 Preservation of Information; Communications to Certificateholders
	  	 	36	  
			
	 Section 8.03.
	 	 Reports by Trustee
	  	 	37	  
			
	 Section 8.04.
	 	 Reports by the Company
	  	 	37	  
		
	 ARTICLE IX SUPPLEMENTAL AGREEMENTS
	  	 	37	  
			
	 Section 9.01.
	 	 Supplemental Agreements Without Consent of Certificateholders
	  	 	37	  
			
	 Section 9.02.
	 	 Supplemental Agreements with Consent of Certificateholders
	  	 	39	  
			
	 Section 9.03.
	 	 Documents Affecting Immunity or Indemnity
	  	 	40	  
			
	 Section 9.04.
	 	 Execution of Supplemental Agreements
	  	 	40	  
			
	 Section 9.05.
	 	 Effect of Supplemental Agreements
	  	 	40	  
			
	 Section 9.06.
	 	 Conformity with Trust Indenture Act
	  	 	40	  
			
	 Section 9.07.
	 	 Reference in Certificates to Supplemental Agreements
	  	 	40	  
		
	 ARTICLE X AMENDMENTS TO INDENTURE AND NOTE DOCUMENTS
	  	 	40	  
			
	 Section 10.01.
	 	 Amendments and Supplements to Indenture and Other Note Documents
	  	 	40	  
		
	 ARTICLE XI TERMINATION OF TRUSTS
	  	 	41	  
			
	 Section 11.01.
	 	 Termination of the Trusts
	  	 	41	  

  
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	 ARTICLE XII MISCELLANEOUS PROVISIONS
	  	 	42	  
			
	 Section 12.01.
	 	 Limitation on Rights of Certificateholders
	  	 	42	  
			
	 Section 12.02.
	 	 Liabilities of Certificateholders
	  	 	42	  
			
	 Section 12.03.
	 	 Registration of Equipment Notes in Name of Subordination Agent
	  	 	42	  
			
	 Section 12.04.
	 	 Notices
	  	 	42	  
			
	 Section 12.05.
	 	 Governing Law
	  	 	43	  
			
	 Section 12.06.
	 	 Severability of Provisions
	  	 	43	  
			
	 Section 12.07.
	 	 Trust Indenture Act Controls
	  	 	43	  
			
	 Section 12.08.
	 	 Effect of Headings and Table of Contents
	  	 	44	  
			
	 Section 12.09.
	 	 Successors and Assigns
	  	 	44	  
			
	 Section 12.10.
	 	 Benefits of Agreement
	  	 	44	  
			
	 Section 12.11.
	 	 Legal Holidays
	  	 	44	  
			
	 Section 12.12.
	 	 Counterparts
	  	 	44	  
			
	 Section 12.13.
	 	 Communication by Certificateholders with Other Certificateholders
	  	 	44	  
			
	 Section 12.14.
	 	 Intention of Parties
	  	 	44	  

 EXHIBITS 

Exhibit A Form of Certificate 

  
 iv 

 Reconciliation and tie between Spirit Airlines Pass Through Trust Agreement, dated as of August 11, 2015 and
the Trust Indenture Act of 1939. This reconciliation does not constitute part of the Pass Through Trust Agreement. 
  

			
	 Trust Indenture Act

of 1939 Section
	  	 Pass Through Trust

Agreement Section

	 310(a)(1)
	  	 7.08

	 (a)(2)
	  	 7.08

	 312(a)
	  	 3.05; 7.12; 8.01; 8.02

	 313(a) and (c)
	  	 8.03

	 313(b) and (d)
	  	 N.A.

	 314(a)(1)-(3)
	  	 8.04(a) - (c)

	 (a)(4)
	  	 8.04(d)

	 (c)(1)
	  	 1.02

	 (c)(2)
	  	 1.02

	 (d)(1)
	  	 N.A.

	 (d)(2)
	  	 N.A.

	 (d)(3)
	  	 N.A.

	 (e)
	  	 1.02

	 315(b)
	  	 7.02

	 315(c)
	  	 7.01(b)

	 316(a)(last sentence)
	  	 1.04(c)

	 (a)(1)(A)
	  	 6.04

	 (a)(1)(B)
	  	 6.05

	 (b)
	  	 6.06

	 (c)
	  	 1.04(d)

	 317(a)(1)
	  	 6.03

	 (b)
	  	 7.13

	 318(a)
	  	 12.07

 N.A. means not applicable. 

  
 v 

 PASS THROUGH TRUST AGREEMENT 

This PASS THROUGH TRUST AGREEMENT, dated as of August 11, 2015 (this “Basic Agreement”), between SPIRIT AIRLINES, INC.,
a Delaware corporation (the “Company”), and WILMINGTON TRUST, NATIONAL ASSOCIATION, a national banking association, as Trustee, is made with respect to the formation from time to time of separate Spirit Airlines Pass Through Trusts,
and the issuance from time to time of separate series of Pass Through Certificates representing fractional undivided interests in the respective Trusts. 

WITNESSETH: 
 WHEREAS, from time
to time, the Company and the Trustee may enter into one or more Trust Supplements (this and certain other defined terms used herein are defined in Section 1.01) pursuant to which the Trustee shall declare the creation of a separate Trust for
the benefit of the Holders of the series of Certificates to be issued in respect of such Trust, and the initial Holders of the Certificates of such series, as the grantors of such Trust, by their respective acceptances of the Certificates of such
series, shall join in the creation of such Trust with the Trustee; 
 WHEREAS, all Certificates to be issued in respect of each separate
Trust will be issued as a separate series pursuant to this Agreement, will evidence fractional undivided interests in such Trust and will have no rights, benefits or interests in respect of any other separate Trust or the property held therein,
subject, however, to the provisions of any Intercreditor Agreement to which one or more Trusts may be a party; 
 WHEREAS, from time to
time, pursuant to the terms and conditions of this Agreement with respect to each separate Trust formed hereunder, the Trustee on behalf of such Trust shall purchase one or more issues of Equipment Notes having the same interest rate as, and final
maturity dates not later than the final Regular Distribution Date of, the series of Certificates issued in respect of such Trust and, subject to the terms of any related Intercreditor Agreement, shall hold such Equipment Notes in trust for the
benefit of the Certificateholders of such Trust; 
 WHEREAS, to facilitate the sale of Equipment Notes to, and the purchase of Equipment
Notes by, the Trustee on behalf of each Trust created from time to time pursuant to this Agreement, the Company as the “issuer”, as such term is defined in and solely for purposes of the Securities Act of 1933, as amended, of the
Certificates to be issued in respect of each Trust and as the “obligor”, as such term is defined in and solely for purposes of the Trust Indenture Act has duly authorized the execution and delivery of this Basic Agreement, and will
duly authorize the execution and delivery of each Trust Supplement with respect to all such Certificates, and is undertaking to perform certain administrative and ministerial duties hereunder and is also undertaking to pay the fees and expenses of
the Trustee; and 
 WHEREAS, this Basic Agreement, as supplemented from time to time, is subject to the provisions of the Trust Indenture
Act and shall, to the extent applicable, be governed by such provisions; 
 NOW, THEREFORE, in consideration of the mutual agreements herein
contained, and of other good and valuable consideration the receipt and adequacy of which are hereby acknowledged, the parties hereto agree as follows: 

 ARTICLE I 

DEFINITIONS 

Section 1.01. Definitions. For all purposes of this Basic Agreement, except as otherwise expressly provided or unless the context
otherwise requires: 
 (1) the terms used herein that are defined in this Article I have the meanings assigned to them in this Article I,
and include the plural as well as the singular; 
 (2) all other terms used herein which are defined in the Trust Indenture Act, either
directly or by reference therein, or by the rules promulgated under the Trust Indenture Act, have the meanings assigned to them therein; 

(3) all references in this Basic Agreement to designated “Articles”, “Sections”,
“Subsections” and other subdivisions are to the designated Articles, Sections, Subsections and other subdivisions of this Basic Agreement; 

(4) the words “herein”, “hereof” and “hereunder” and other words of similar import refer to
this Basic Agreement as a whole and not to any particular Article, Section, Subsection or other subdivision; 
 (5) unless the context
otherwise requires, whenever the word “including”, “include” or “includes” is used herein, it shall be deemed to be followed by the phrase “without limitation”; and 

(6) the term “this Agreement” (as distinguished from “this Basic Agreement”) refers, unless the context
otherwise requires, to this Basic Agreement as supplemented by the Trust Supplement creating a particular Trust and establishing the series of Certificates issued or to be issued in respect thereof, with reference to such Trust and such series of
Certificates, as this Basic Agreement as so supplemented may be further supplemented with respect to such Trust and such series of Certificates. 

Act: Has the meaning, with respect to any Certificateholder, specified in Section 1.04(a). 

Affiliate: Means, with respect to any specified Person, any other Person directly or indirectly controlling or controlled by or under
direct or indirect common control with such Person. For the purposes of this definition, “control”, when used with respect to any specified Person, means the power, directly or indirectly, to direct the management and policies of
such Person, whether through the ownership of voting securities or by contract or otherwise, and the terms “controlling” and “controlled” have meanings correlative to the foregoing. 

Aircraft: Means one or more aircraft, including engines therefor, owned by or leased to the Company and securing one or more Equipment
Notes. 
 Authorized Agent: Means, with respect to the Certificates of any series, any Paying Agent or Registrar for the Certificates
of such series. 
 Basic Agreement: Means this Pass Through Trust Agreement, as the same may from time to time be supplemented,
amended or modified, but does not include any Trust Supplement. 

  
 2 

 Book-Entry Certificates: Means, with respect to the Certificates of any series, a
beneficial interest in the Certificates of such series, ownership and transfers of which shall be made through book entries as described in Section 3.05. 

Business Day: Means, with respect to the Certificates of any series, any day other than a Saturday, a Sunday or a day on which
commercial banks are required or authorized to close in New York, New York, or, so long as any Certificate of such series is outstanding, the city and state in which the Trustee or any related Loan Trustee maintains its Corporate Trust Office or
receives and disburses funds. 
 Certificate: Means any one of the certificates executed and authenticated by the Trustee,
substantially in the form of Exhibit A hereto. 
 Certificate Account: Means, with respect to the Certificates of any series,
the account or accounts created and maintained for such series pursuant to Section 4.01(a) and the related Trust Supplement. 

Certificateholder or Holder: Means, with respect to the Certificates of any series, the Person in whose name a Certificate of such
series is registered in the Register for Certificates of such series. 
 Certificate Owner: Means, with respect to the Certificates
of any series, for purposes of Section 3.05, the Person who owns a Book-Entry Certificate of such series. 
 Clearing Agency:
Means an organization registered as a “clearing agency” pursuant to Section 17A of the Securities Exchange Act of 1934, as amended. 

Clearing Agency Participant: Means a broker, dealer, bank, other financial institution or other Person for whom from time to time a
Clearing Agency effects, directly or indirectly, book-entry transfers and pledges of securities deposited with the Clearing Agency. 

Company: Means Spirit Airlines, Inc., a Delaware corporation, or its successor in interest pursuant to Section 5.02, or (only in
the context of provisions hereof, if any, when such reference is required for purposes of compliance with the Trust Indenture Act) any other “obligor” (within the meaning of the Trust Indenture Act) with respect to the Certificates of any
series. 
 Controlling Party: Means, with respect to a series of Certificates, the Person entitled to act as such pursuant to the
terms of the related Intercreditor Agreement. 
 Corporate Trust Office: Means, with respect to the Trustee or any Loan Trustee, the
office of such trustee in the city at which at any particular time its corporate trust business shall be principally administered. 

Cut-off Date: Means, with respect to the Certificates of any series, the date designated as such in the Trust Supplement establishing
such series. 
 Definitive Certificates: Has the meaning, with respect to the Certificates of any series, specified in
Section 3.05. 
 Direction: Has the meaning specified in Section 1.04(a). 

  
 3 

 Distribution Date: Means a Regular Distribution Date or a Special Distribution Date. 

Equipment Notes: Means, with respect to the Certificates of any series, all of the equipment notes issued under the Indentures related
to such series of Certificates. 
 ERISA: Means the Employee Retirement Income Security Act of 1974, as amended from time to time, or
any successor federal statute. 
 Escrow Account: Has the meaning, with respect to the Certificates of any series, specified in
Section 2.02(b). 
 Escrowed Funds: Has the meaning, with respect to any Trust, specified in Section 2.02(b). 

Event of Default: Means, in respect of any Trust, an Indenture Event of Default under any Indenture pursuant to which Equipment Notes
held by such Trust were issued. 
 Fractional Undivided Interest: Means the fractional undivided interest in a Trust that is
evidenced by a Certificate relating to such Trust. 
 Indenture: Means, with respect to any Trust, each of the one or more separate
trust indenture and security agreements or trust indenture and mortgages or similar documents described in, or on a schedule attached to, the Trust Supplement and an indenture having substantially the same terms and conditions which relates to a
Substitute Aircraft, as each such indenture may be amended or supplemented in accordance with its respective terms; and “Indentures” means all of such agreements. 

Indenture Event of Default: Means, with respect to any Indenture, any Indenture Event of Default (as such term is defined in such
Indenture). 
 Initial Regular Distribution Date: Means, with respect to the Certificates of any series, the first Regular
Distribution Date on which a Scheduled Payment is to be made. 
 Intercreditor Agreement: Means any agreement by and among the
Trustee, as trustee hereunder with respect to one or more Trusts, one or more Liquidity Providers, if any, and a Subordination Agent providing, among other things, for the distribution of payments made in respect of Equipment Notes held by such
Trusts. 
 Issuance Date: Means, with respect to the Certificates of any series, the date of the issuance of such Certificates. 

Lease: Means any lease between an Owner Trustee, as the lessor, and the Company, as the lessee, referred to in the related Indenture,
as such lease may be amended, supplemented or otherwise modified in accordance with its terms; and “Leases” means all such Leases. 

Letter of Representations: Means, with respect to the Certificates of any series, an agreement among the Company, the Trustee and the
initial Clearing Agency as called for by any related Trust Supplement. 
 Liquidity Facility: Means, with respect to the Certificates
of any series, any revolving credit agreement, letter of credit or similar facility relating to the Certificates of such series between a 

  
 4 

 
bank or other financial institution and a Subordination Agent, as amended, replaced, supplemented or otherwise modified from time to time in accordance with its terms and the terms of any
applicable Intercreditor Agreement. 
 Liquidity Provider: Means, with respect to the Certificates of any series, a bank or other
financial institution that agrees to provide a Liquidity Facility for the benefit of the holders of Certificates of such series. 
 Loan
Trustee: Means, with respect to any Equipment Note or the Indenture applicable thereto, the bank or trust company designated as loan or indenture trustee under such Indenture, and any successor to such Loan Trustee as such trustee; and
“Loan Trustees” means all of the Loan Trustees under the Indentures. 
 Note Documents: Means, with respect to the
Certificates of any series, the Equipment Notes with respect to such Certificates and, with respect to such Equipment Notes, the related Indenture, Note Purchase Agreement and, if the related Aircraft is leased to the Company, the related Lease and
the related Owner Trustee’s Purchase Agreement. 
 Note Purchase Agreement: Means, with respect to the Certificates of any
series, any note purchase, refunding, participation or similar agreement providing for, among other things, the purchase of Equipment Notes by the Trustee on behalf of the relevant Trust; and “Note Purchase Agreements” means all
such agreements. 
 Officer’s Certificate: Means a certificate signed, (a) in the case of the Company, by the Chairman or
Vice Chairman of the Board of Directors, the Chief Executive Officer, the President, any Vice President or the Treasurer of the Company, signing alone, or (b) in the case of the Trustee or an Owner Trustee or a Loan Trustee, a Responsible
Officer of the Trustee or such Owner Trustee or such Loan Trustee, as the case may be. 
 Opinion of Counsel: Means a written opinion
of legal counsel who (a) in the case of counsel for the Company may be (i) a senior attorney of the Company one of whose principal duties is furnishing advice as to legal matters, (ii) Paul, Weiss, Rifkind, Wharton & Garrison
LLP or (iii) such other counsel designated by the Company and reasonably acceptable to the Trustee and (b) in the case of any Owner Trustee or any Loan Trustee, may be such counsel as may be designated by any of them whether or not such
counsel is an employee of any of them, and who shall be reasonably acceptable to the Trustee. 
 Other Agreements: Has the meaning
specified in Section 6.01(b). 
 Outstanding: When used with respect to Certificates of any series, means, as of the date of
determination, all Certificates of such series theretofore authenticated and delivered under this Agreement, except: 
 (i)
Certificates of such series theretofore cancelled by the Registrar or delivered to the Trustee or the Registrar for cancellation; 

(ii) All of the Certificates of such series if money in the full amount required to make the final distribution with respect to
such series pursuant to Section 11.01 hereof has been theretofore deposited with the Trustee in trust for the Holders of the Certificates of such series as provided in Section 4.01 pending distribution of such money to such
Certificateholders pursuant to payment of such final distribution payment; and 
 (iii) Certificates of such series in
exchange for or in lieu of which other Certificates of such series have been authenticated and delivered pursuant to this Agreement. 

  
 5 

 Owner Participant: Means, with respect to any Equipment Note, the “Owner
Participant”, if any, as referred to in the Indenture pursuant to which such Equipment Note is issued and any permitted successor or assign of such Owner Participant; and “Owner Participants” at any time of determination means all
of the Owner Participants thus referred to in the Indentures. 
 Owner Trustee: Means, with respect to any Equipment Note, the
“Owner Trustee”, if any, as referred to in the Indenture pursuant to which such Equipment Note is issued, not in its individual capacity but solely as trustee; and “Owner Trustees” means all of the Owner Trustees party to
any of the related Indentures. 
 Owner Trustee’s Purchase Agreement: Has the meaning, with respect to the Certificates of any
series if the related Aircraft is leased to the Company, specified therefor in the related Lease. 
 Paying Agent: Means, with
respect to the Certificates of any series, the paying agent maintained and appointed for the Certificates of such series pursuant to Section 7.12. 

Permitted Investments: Means obligations of the United States of America or agencies or instrumentalities thereof for the payment of
which the full faith and credit of the United States of America is pledged, maturing in not more than 60 days after the date of acquisition thereof or such lesser time as is required for the distribution of any Special Payments on a Special
Distribution Date. 
 Person: Means any person, including any individual, corporation, limited liability company, partnership, joint
venture, association, joint-stock company, trust, trustee, unincorporated organization, or government or any agency or political subdivision thereof. 

Pool Balance: Means, with respect to the Certificates of any series as of any date, (i) the original aggregate face amount of the
Certificates of any series less (ii) the aggregate amount of all payments made in respect of such Certificates other than payments made in respect of interest or premium thereon or reimbursement of any costs or expenses incurred in connection
therewith. The Pool Balance as of any Distribution Date shall be computed after giving effect to the payment of principal, if any, on the Equipment Notes or other Trust Property held in the Trust and the distribution thereof to be made on such
Distribution Date. 
 Pool Factor: Means, with respect to any series of Certificates as of any date, the quotient (rounded to the
seventh decimal place) computed by dividing (i) the Pool Balance of such series as at such date by (ii) the original aggregate face amount of the Certificates of such series. The Pool Factor as of any Distribution Date shall be computed
after giving effect to the payment of principal, if any, on the Equipment Notes or other Trust Property held in the Trust and the distribution thereof to be made on such Distribution Date. 

Postponed Notes: Means, with respect to any Trust or the related series of Certificates, the Equipment Notes to be held in such Trust
as to which a Postponement Notice shall have been delivered pursuant to Section 2.02(b). 

  
 6 

 Postponement Notice: Means, with respect to any Trust or the related series of
Certificates, an Officer’s Certificate of the Company signed by an officer of the Company (1) requesting that the Trustee temporarily postpone purchase of the related Equipment Notes to a date later than the Issuance Date of such series of
Certificates, (2) identifying the amount of the purchase price of each such Equipment Note and the aggregate purchase price for all such Equipment Notes, (3) setting forth the reasons for such postponement and (4) with respect to each
such Equipment Note, either (a) setting or resetting a new Transfer Date (which shall be on or prior to the applicable Cut-off Date) for payment by the Trustee of such purchase price and issuance of the related Equipment Note (subject to
subsequent change from time to time in accordance with the relevant Note Purchase Agreement), or (b) indicating that such new Transfer Date (which shall be on or prior to the applicable Cut-off Date) will be set by subsequent written notice not
less than one Business Day prior to such new Transfer Date (subject to subsequent change from time to time in accordance with the relevant Note Purchase Agreement). 

Potential Purchaser: Has the meaning, with respect to any Certificateholder, specified in Section 6.01(b). 

PTC Event of Default: Means, with respect to the Certificates of any series, any failure to pay within ten Business Days of the due
date thereof: (i) the outstanding Pool Balance of such series of Certificates on the date specified in any Trust Supplement for such payment or (ii) interest due on the Certificates of such series on any Distribution Date (unless the
related Subordination Agent shall have made an Interest Drawing or Drawings (as defined in the related Intercreditor Agreement), or a withdrawal or withdrawals pursuant to a cash collateral account under such Intercreditor Agreement, with respect
thereto in an aggregate amount sufficient to pay such interest and shall have distributed such amount to the Trustee). 
 Purchasing
Certificateholder: Has the meaning, with respect to any Certificateholder, specified in Section 6.01(b). 
 Record Date:
Means, with respect to any Trust or the related series of Certificates, (i) for Scheduled Payments to be distributed on any Regular Distribution Date, other than the final distribution with respect to such series, the 15th day (whether or not a
Business Day) preceding such Regular Distribution Date, and (ii) for Special Payments to be distributed on any Special Distribution Date, other than the final distribution with respect to such series, the 15th day (whether or not a Business
Day) preceding such Special Distribution Date. 
 Register and Registrar: Means, each with respect to the Certificates of any
series, the register maintained and the registrar appointed pursuant to Sections 3.04 and 7.12. 
 Regular Distribution Date: Means,
with respect to distributions of Scheduled Payments in respect of any series of Certificates, each date designated as such in this Agreement, until payment of all the Scheduled Payments to be made under the Equipment Notes held in the Trust has been
made. 
 Request: Means a request by the Company setting forth the subject matter of the request accompanied by an Officer’s
Certificate and an Opinion of Counsel as provided in Section 1.02 of this Basic Agreement. 
 Responsible Officer: Means, with
respect to any Trustee, any Loan Trustee and any Owner Trustee, any officer in the Corporate Trust Department of the Trustee, Loan Trustee or Owner Trustee or any other officer customarily performing functions similar to those performed by the
persons who at the time shall be such officers, respectively, or to whom any corporate trust matter is referred because of his knowledge of and familiarity with a particular subject. 

  
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 Responsible Party: Means, with respect to the Certificates of any series, the person
designated as such in the related Trust Supplement. 
 Scheduled Payment: Means, with respect to any Equipment Note, (i) any
payment of principal or interest on such Equipment Note (other than any such payment which is not in fact received by the Trustee or the applicable Subordination Agent within five days of the date on which such payment is scheduled to be made) or
(ii) any payment of interest on the Certificates of any series with funds drawn under the Liquidity Facility for such series, which payment represents the installment of principal on such Equipment Note at the stated maturity of such
installment, the payment of regularly scheduled interest accrued on the unpaid principal amount of such Equipment Note, or both; provided, however, that any payment of principal, premium, if any, or interest resulting from the
redemption or purchase of any Equipment Note shall not constitute a Scheduled Payment. 
 SEC: Means the Securities and Exchange
Commission, as from time to time constituted or created under the Securities Exchange Act of 1934, as amended, or, if at any time after the execution of this instrument such Commission is not existing and performing the duties now assigned to it
under the Trust Indenture Act, then the body performing such duties on such date. 
 Selling Certificateholder: Has the meaning, with
respect to any Certificateholder, specified in Section 6.01(b). 
 Special Distribution Date: Means, with respect to the
Certificates of any series, each date on which a Special Payment is to be distributed as specified in this Agreement. 
 Special
Payment: Means (i) any payment (other than a Scheduled Payment) in respect of, or any proceeds of, any Equipment Note or Trust Indenture Estate (as defined in each Indenture), (ii) the amounts required to be distributed pursuant to
the last paragraph of Section 2.02(b) or (iii) the amounts required to be distributed pursuant to the penultimate paragraph of Section 2.02(b). 

Special Payments Account: Means, with respect to the Certificates of any series, the account or accounts created and maintained for
such series pursuant to Section 4.01(b) and the related Trust Supplement. 
 Specified Investments: Means, with respect to any
Trust, unless otherwise specified in the related Trust Supplement, (i) obligations of, or guaranteed by, the United States Government or agencies thereof, (ii) open market commercial paper of any corporation incorporated under the laws of
the United States of America or any state thereof rated at least P-2 or its equivalent by Moody’s Investors Service, Inc. or at least A-2 or its equivalent by Standard & Poor’s Ratings Services, (iii) certificates of deposit
issued by commercial banks organized under the laws of the United States or of any political subdivision thereof having a combined capital and surplus in excess of $100,000,000 which banks or their holding companies have a rating of A or its
equivalent by Moody’s Investors Service, Inc. or Standard & Poor’s Ratings Services; provided, however, that the aggregate amount at any one time so invested in certificates of deposit issued by any one bank shall
not exceed 5% of such bank’s capital and surplus, (iv) U.S. dollar-denominated offshore certificates of deposit issued by, or offshore time deposits with, any commercial bank described in clause (iii) above or any subsidiary thereof
and (v) repurchase agreements with any financial institution having combined capital and surplus of at least $100,000,000 

  
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with any of the obligations described in clauses (i) through (iv) above as collateral; provided further that if all of the above investments are unavailable, the entire amounts
to be invested may be used to purchase federal funds from an entity described in clause (iii) above. 
 Subordination Agent: Has
the meaning specified therefor in any applicable Intercreditor Agreement. 
 Substitute Aircraft: Means, with respect to any Trust,
any Aircraft of a type specified in this Agreement and, at the election of the Company, substituted prior to the applicable Cut-off Date, if any, pursuant to the terms of this Agreement. 

Transfer Date: Has the meaning assigned to that term or any of the terms “Delivery Date”, “Funding Date” or
“Closing Date” in the applicable Note Purchase Agreement, and in any event refers to any such date as it may be changed from time to time in accordance with the terms of such Note Purchase Agreement. 

Triggering Event: Has the meaning specified therefor in the applicable Intercreditor Agreement. 

Trust: Means, with respect to the Certificates of any series, the related trust under this Agreement. 

Trustee: Means Wilmington Trust, National Association, or its successor in interest, and any successor or other trustee appointed as
provided herein. 
 Trust Indenture Act: Means, with respect to any particular Trust, the United States Trust Indenture Act of 1939,
as in force at the date as of which the related Trust Supplement was executed. 
 Trust Property: Means, with respect to any Trust,
(i) subject to any related Intercreditor Agreement, the Equipment Notes held as the property of such Trust, all monies at any time paid thereon and all monies due and to become due thereunder, (ii) funds from time to time deposited in the
related Escrow Account, the related Certificate Account and the related Special Payments Account and, subject to the related Intercreditor Agreement, any proceeds from the sale by the Trustee pursuant to Article VI hereof of any such Equipment Note,
(iii) all rights of such Trust and the Trustee, on behalf of the Trust, under any Intercreditor Agreement, including, without limitation, all monies receivable in respect of such rights, and (iv) all monies receivable under any Liquidity
Facility for such Trust. 
 Trust Supplement: Means an agreement supplemental hereto pursuant to which (i) a separate Trust is
created for the benefit of the Holders of the Certificates of a series, (ii) the issuance of the Certificates of such series representing fractional undivided interests in such Trust is authorized and (iii) the terms of the Certificates of
such series are established. 
 Section 1.02. Compliance Certificates and Opinions. Upon any application or request by the
Company, any Owner Trustee or any Loan Trustee to the Trustee to take any action under any provision of this Basic Agreement or, in respect of the Certificates of any series, this Agreement, the Company, such Owner Trustee or such Loan Trustee, as
the case may be, shall furnish to the Trustee (i) an Officer’s Certificate stating that, in the opinion of the signer or signers, all conditions precedent, if any, provided for in this Basic Agreement or this Agreement relating to the
proposed action have been complied with and (ii) an Opinion of Counsel stating that in the opinion of such counsel all such conditions precedent, if any, have been complied with, except that in the case of any such application or

  
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request as to which the furnishing of such documents is specifically required by any provision of this Basic Agreement or this Agreement relating to such particular application or request, no
such Officer’s Certificate or Opinion of Counsel need be furnished. 
 Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Basic Agreement or, in respect of the Certificates of any series, this Agreement (other than a certificate provided pursuant to Section 8.04(d)) or any Trust Supplement shall include: 

(1) a statement that each individual signing such certificate or opinion has read such covenant or condition and the
definitions in this Basic Agreement or this Agreement relating thereto; 
 (2) a brief statement as to the nature and scope
of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based; 

(3) a statement that, in the opinion of each such individual or firm, he or it has made such examination or investigation as is
necessary to enable him or it to express an informed opinion as to whether or not such covenant or condition has been complied with; and 

(4) a statement as to whether, in the opinion of each such individual or firm, such condition or covenant has been complied
with. 
 Section 1.03. Form of Documents Delivered to Trustee. In any case where several matters are required to be certified
by, or covered by an opinion of, any specified Person, it is not necessary that all such matters be certified by, or covered by the opinion of, only one such Person, or that they be so certified or covered by only one document, but one such Person
may certify or give an opinion with respect to some matters and one or more other such Persons as to other matters and any such Person may certify or give an opinion as to such matters in one or several documents. 

Where any Person is required to make, give or execute two or more applications, requests, consents, certificates, statements, opinions or
other instruments under this Basic Agreement or, in respect of the Certificates of any series, this Agreement, they may, but need not, be consolidated and form one instrument. 

Section 1.04. Directions of Certificateholders. (a) Any direction, consent, request, demand, authorization, notice, waiver or
other action provided by this Agreement in respect of the Certificates of any series to be given or taken by Certificateholders (a “Direction”) may be embodied in and evidenced by one or more instruments of substantially similar
tenor signed by such Certificateholders in person or by an agent or proxy duly appointed in writing or, in the case of Certificates evidenced by a Book-Entry Certificate, by any electronic transmission or other message, whether or not in written
format, that complies with the Clearing Agency’s applicable procedures; and, except as herein otherwise expressly provided, such action shall become effective when such instrument or instruments are delivered to the Trustee and, when it is
hereby expressly required pursuant to this Agreement, to the Company or any Loan Trustee. Such instrument or instruments (and the action embodied therein and evidenced thereby) are herein sometimes referred to as the “Act” of the
Certificateholders signing such instrument or instruments. Proof of execution of any such instrument or of a writing appointing any such agent or proxy shall be sufficient for any purpose of this Agreement and conclusive in favor of the Trustee, the
Company and the related Loan Trustee, if made in the manner provided in this Section 1.04. 

  
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 (b) The fact and date of the execution by any Person of any such instrument or writing may be
proved by the certificate of any notary public or other officer of any jurisdiction authorized to take acknowledgments of deeds or administer oaths that the Person executing such instrument acknowledged to him the execution thereof, or by an
affidavit of a witness to such execution sworn to before any such notary or such other officer, and where such execution is by an officer of a corporation or association or a member of a partnership, on behalf of such corporation, association or
partnership, such certificate or affidavit shall also constitute sufficient proof of his authority. The fact and date of the execution of any such instrument or writing, or the authority of the Person executing the same, may also be proved in any
other reasonable manner which the Trustee deems sufficient. 
 (c) In determining whether the Certificateholders of the requisite
Fractional Undivided Interests of Certificates of any series Outstanding have given any Direction under this Agreement, Certificates owned by the Company or any Affiliate thereof shall be disregarded and deemed not to be Outstanding for purposes of
any such determination. In determining whether the Trustee shall be protected in relying upon any such Direction, only Certificates which the Trustee knows to be so owned shall be so disregarded. Notwithstanding the foregoing, (i) if any such
Person owns 100% of the Certificates of any series Outstanding, such Certificates shall not be so disregarded, and (ii) if any amount of Certificates of any series so owned by any such Person have been pledged in good faith, such Certificates
shall not be disregarded if the pledgee establishes to the satisfaction of the Trustee the pledgee’s right so to act with respect to such Certificates and that the pledgee is not the Company or any Affiliate thereof. 

(d) The Company may, at its option, by delivery of an Officer’s Certificate to the Trustee, set a record date to determine the
Certificateholders in respect of the Certificates of any series, entitled to give any Direction. Notwithstanding Section 316(c) of the Trust Indenture Act, such record date shall be the record date specified in such Officer’s Certificate,
which shall be a date not more than 30 days prior to the first solicitation of Certificateholders of the applicable series in connection therewith. If such a record date is fixed, such Direction may be given before or after such record date, but
only the Certificateholders of record of the applicable series at the close of business on such record date shall be deemed to be Certificateholders for the purposes of determining whether Certificateholders of the requisite proportion of
Outstanding Certificates of such series have authorized or agreed or consented to such Direction, and for that purpose the Outstanding Certificates shall be computed as of such record date; provided, however, that no such Direction by the
Certificateholders on such record date shall be deemed effective unless it shall become effective pursuant to the provisions of this Agreement not later than one year after such record date. 

(e) Any Direction by the Holder of any Certificate shall bind the Holder of every Certificate issued upon the transfer thereof or in exchange
therefor or in lieu thereof, whether or not notation of such Direction is made upon such Certificate. 
 (f) Except as otherwise provided
in Section 1.04(c), Certificates of any series owned by or pledged to any Person shall have an equal and proportionate benefit under the provisions of this Agreement, without preference, priority or distinction as among all of the Certificates
of such series. 
 ARTICLE II 

ORIGINAL ISSUANCE OF CERTIFICATES: ACQUISITION OF TRUST PROPERTY 

Section 2.01. Amount Unlimited; Issuable in Series. (a) The aggregate face amount of Certificates which may be authenticated
and delivered under this Basic Agreement is unlimited. The 

  
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Certificates may be issued from time to time in one or more series and shall be designated generally as the “Pass Through Certificates”, with such further designations added or
incorporated in such title for the Certificates of each series as specified in the related Trust Supplement. Each Certificate shall bear upon its face the designation so selected for the series to which it belongs. All Certificates of the same
series shall be substantially identical except that the Certificates of a series may differ as to denomination and as may otherwise be provided in the Trust Supplement establishing the Certificates of such series. Each series of Certificates issued
pursuant to this Agreement will evidence fractional undivided interests in the related Trust and, except as may be contained in any Intercreditor Agreement, will have no rights, benefits or interests in respect of any other Trust or the Trust
Property held therein. All Certificates of the same series shall be in all respects equally and ratably entitled to the benefits of this Agreement without preference, priority or distinction on account of the actual time or times of authentication
and delivery, all in accordance with the terms and provisions of this Agreement. 
 (b) The following matters shall be established with
respect to the Certificates of each series issued hereunder by a Trust Supplement executed and delivered by and between the Company and the Trustee: 

(1) the formation of the Trust as to which the Certificates of such series represent fractional undivided interests and its
designation (which designation shall distinguish such Trust from each other Trust created under this Basic Agreement and a Trust Supplement); 

(2) the specific title of the Certificates of such series (which title shall distinguish the Certificates of such series from
each other series of Certificates created under this Basic Agreement and a Trust Supplement); 
 (3) any limit upon the
aggregate face amount of the Certificates of such series which may be authenticated and delivered (which limit shall not pertain to Certificates authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other
Certificates of the series pursuant to Sections 3.03, 3.04 and 3.06); 
 (4) the Cut-off Date with respect to the
Certificates of such series; 
 (5) the Regular Distribution Dates applicable to the Certificates of such series; 

(6) the Special Distribution Dates applicable to the Certificates of such series; 

(7) if other than as provided in Section 7.12(b), the Registrar or the Paying Agent for the Certificates of such series,
including any Co-Registrar or additional Paying Agent; 
 (8) if other than as provided in Section 3.01, the
denominations in which the Certificates of such series shall be issuable; 
 (9) if other than United States dollars, the
currency or currencies (including currency units) in which the Certificates of such series shall be denominated; 

  
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 (10) the specific form of the Certificates of such series (including the
interest rate applicable thereto) and whether or not Certificates of such series are to be issued as Book-Entry Certificates and, if such Certificates are to be Book-Entry Certificates, the form of Letter of Representations, if any (or, in the case
of any Certificates denominated in a currency other than United States dollars and if other than as provided in Section 3.05, whether and the circumstances under which beneficial owners of interests in such Certificates in permanent global form
may exchange such interests for Certificates of such series and of like tenor of any authorized form and denomination); 

(11) a description of the Equipment Notes to be acquired and held in the related Trust and of the related Aircraft and Note
Documents; 
 (12) provisions with respect to the terms for which the definitions set forth in Article I hereof or the terms
of Section 11.01 hereof require further specification in the related Trust Supplement; 
 (13) any restrictions
(including legends) in respect of ERISA; 
 (14) whether such series will be subject to an Intercreditor Agreement and, if
so, the specific designation of such Intercreditor Agreement; 
 (15) whether such series will have the benefit of a
Liquidity Facility and, if so, the specific designation of such Liquidity Facility; 
 (16) whether there will be a deposit
agreement or other comparable arrangement prior to the delivery of one or more Aircraft and, if so, any terms appropriate thereto; and 

(17) any other terms of the Certificates of such series (which terms shall not be inconsistent with the provisions of the
Trust Indenture Act), including any terms of the Certificates of such series which may be required or advisable under United States laws or regulations or advisable in connection with the marketing of Certificates of the series. 

(c) At any time and from time to time after the execution and delivery of this Basic Agreement and a Trust Supplement forming a Trust and
establishing the terms of Certificates of a series, Certificates of such series shall be executed, authenticated and delivered by the Trustee to the Person or Persons specified by the Company upon request of the Company and upon satisfaction or
waiver of any conditions precedent set forth in such Trust Supplement. 
 Section 2.02. Acquisition of Equipment Notes.
(a) Unless otherwise specified in the related Trust Supplement, on or prior to the Issuance Date of the Certificates of a series, the Trustee shall execute and deliver the related Note Purchase Agreements in the form delivered to the Trustee by
the Company and shall, subject to the respective terms thereof, perform its obligations under such Note Purchase Agreements. The Trustee shall issue and sell such Certificates, in authorized denominations and in such Fractional Undivided Interests,
so as to result in the receipt of consideration in an amount equal to the aggregate purchase price of the Equipment Notes contemplated to be purchased by the Trustee under the related Note Purchase Agreements and, concurrently therewith, the Trustee
shall purchase, pursuant to the terms and conditions of the Note Purchase Agreements, such Equipment Notes at a purchase price equal to the amount of such consideration so received. Except as provided in

  
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Sections 3.03, 3.04 and 3.06 hereof, the Trustee shall not execute, authenticate or deliver Certificates of such series in excess of the aggregate amount specified in this paragraph. The
provisions of this Subsection (a) are subject to the provisions of Subsection (b) below. 
 (b) If on or prior to the Issuance
Date with respect to a series of Certificates the Company shall deliver to the Trustee a Postponement Notice relating to one or more Postponed Notes, the Trustee shall postpone the purchase of such Postponed Notes and shall deposit into an escrow
account (as to such Trust, the “Escrow Account”) to be maintained as part of the related Trust an amount equal to the purchase price of such Postponed Notes (the “Escrowed Funds”). The portion of the Escrowed Funds
so deposited with respect to any particular Postponed Notes shall be invested by the Trustee at the written direction and risk of, and for the benefit of, the Responsible Party in Specified Investments (i) maturing no later than any scheduled
Transfer Date relating to such Postponed Notes or (ii) if no such Transfer Date has been scheduled, maturing on the next Business Day, or (iii) if the Company has given notice to the Trustee that such Postponed Notes will not be issued,
maturing on the next applicable Special Distribution Date, if such investments are reasonably available for purchase. The Trustee shall make withdrawals from the Escrow Account only as provided in this Agreement. Upon request of the Company on one
or more occasions and the satisfaction or waiver of the closing conditions specified in the applicable Note Purchase Agreements on or prior to the related Cut-off Date, the Trustee shall purchase the applicable Postponed Notes with the Escrowed
Funds withdrawn from the Escrow Account. The purchase price shall equal the principal amount of such Postponed Notes. 
 The Trustee shall
hold all Specified Investments until the maturity thereof and will not sell or otherwise transfer Specified Investments. If Specified Investments held in an Escrow Account mature prior to any applicable Transfer Date, any proceeds received on the
maturity of such Specified Investments (other than any earnings thereon) shall be reinvested by the Trustee at the written direction and risk of, and for the benefit of, the Responsible Party in Specified Investments maturing as provided in the
preceding paragraph. 
 Any earnings on Specified Investments received from time to time by the Trustee shall be promptly distributed to the
Responsible Party. The Responsible Party shall pay to the Trustee for deposit to the relevant Escrow Account an amount equal to any losses on such Specified Investments as incurred. On the Initial Regular Distribution Date in respect of the
Certificates of any series, the Responsible Party will pay (in immediately available funds) to the Trustee an amount equal to the interest that would have accrued on any Postponed Notes with respect to such Certificates, if any, purchased after the
Issuance Date if such Postponed Notes had been purchased on the Issuance Date, from the Issuance Date to, but not including, the date of the purchase of such Postponed Notes by the Trustee. 

If, in respect of the Certificates of any series, the Company notifies the Trustee prior to the Cut-off Date that any Postponed Notes will not
be issued on or prior to the Cut-off Date for any reason, on the next Special Distribution Date for such Certificates occurring not less than 15 days following the date of such notice, (i) the Responsible Party shall pay to the Trustee for
deposit in the related Special Payments Account, in immediately available funds, an amount equal to the interest that would have accrued on the Postponed Notes designated in such notice at a rate equal to the interest rate applicable to such
Certificates from the Issuance Date to, but not including, such Special Distribution Date and (ii) the Trustee shall transfer an amount equal to that amount of Escrowed Funds that would have been used to purchase the Postponed Notes designated
in such notice and the amount paid by the Responsible Party pursuant to the immediately preceding clause (i) to the related Special Payments Account for distribution as a Special Payment in accordance with the provisions hereof. 

  
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 If, on such Cut-off Date, an amount equal to less than all of the Escrowed Funds (other than
Escrowed Funds referred to in the immediately preceding paragraph) has been used to purchase Postponed Notes, on the next such Special Distribution Date occurring not less than 15 days following such Cut-off Date (i) the Responsible Party shall
pay to the Trustee for deposit in such Special Payments Account, in immediately available funds, an amount equal to the interest that would have accrued on such Postponed Notes contemplated to be purchased with such unused Escrowed Funds (other than
Escrowed Funds referred to in the immediately preceding paragraph) but not so purchased at a rate equal to the interest rate applicable to such Certificates from the Issuance Date to, but not including, such Special Distribution Date and
(ii) the Trustee shall transfer such unused Escrowed Funds and the amount paid by the Responsible Party pursuant to the immediately preceding clause (i) to such Special Payments Account for distribution as a Special Payment in accordance
with the provisions hereof. 
 Section 2.03. Acceptance by Trustee. Upon the execution and delivery of a Trust Supplement
creating a Trust and establishing a series of Certificates, the Trustee shall acknowledge its acceptance of all right, title and interest in and to the Trust Property to be acquired pursuant to Section 2.02 hereof and the related Note Purchase
Agreements and shall declare that the Trustee holds and will hold such right, title and interest for the benefit of all then present and future Certificateholders of such series, upon the trusts herein and in such Trust Supplement set forth. By the
acceptance of each Certificate of such series issued to it under this Agreement, each initial Holder of such series as grantor of such Trust shall thereby join in the creation and declaration of such Trust. 

Section 2.04. Limitation of Powers. Each Trust shall be constituted solely for the purpose of making the investment in the
Equipment Notes provided for in the related Trust Supplement, and, except as set forth herein, the Trustee shall not be authorized or empowered to acquire any other investments or engage in any other activities and, in particular, the Trustee shall
not be authorized or empowered to do anything that would cause such Trust to fail to qualify as a “grantor trust” for federal income tax purposes (including, as subject to this restriction, acquiring any Aircraft (as defined in the
respective Indentures) by bidding such Equipment Notes or otherwise, or taking any action with respect to any such Aircraft once acquired). 

ARTICLE III 
 THE
CERTIFICATES 
 Section 3.01. Form, Denomination and Execution of Certificates. The Certificates of each series shall be
issued in fully registered form without coupons and shall be substantially in the form attached hereto as Exhibit A, with such omissions, variations and insertions as are permitted by this Agreement, and may have such letters, numbers or other marks
of identification and such legends or endorsements placed thereon as may be required to comply with the rules of any securities exchange on which such Certificates may be listed or to conform to any usage in respect thereof, or as may, consistently
herewith, be determined by the Trustee or the officers executing such Certificates, as evidenced by the Trustee’s or respective officers’ execution of the Certificates. 

Except as provided in Section 3.05, the definitive Certificates of such series shall be typed, printed, lithographed or engraved or
produced by any combination of these methods or may be produced in any other manner permitted by the rules of any securities exchange on which the Certificates may be listed, all as determined by the officers executing such Certificates, as
evidenced by their execution of such Certificates. 

  
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 Except as otherwise provided in the related Trust Supplement, the Certificates of each series
shall be issued in minimum denominations of $1,000 or integral multiples thereof except that one Certificate of such series may be issued in a different denomination. 

The Certificates of such series shall be executed on behalf of the Trustee by manual or facsimile signature of a Responsible Officer of the
Trustee. Certificates of any series bearing the manual or facsimile signature of an individual who was, at the time when such signature was affixed, authorized to sign on behalf of the Trustee shall be valid and binding obligations of the Trustee,
notwithstanding that such individual has ceased to be so authorized prior to the authentication and delivery of such Certificates or did not hold such office at the date of such Certificates. 

Section 3.02. Authentication of Certificates. (a) On the Issuance Date, the Trustee shall duly execute, authenticate and
deliver Certificates of each series in authorized denominations equalling in the aggregate the aggregate principal amount of the Equipment Notes that may be purchased by the Trustee pursuant to the related Note Purchase Agreements, and evidencing
the entire ownership of the related Trust. Thereafter, the Trustee shall duly execute, authenticate and deliver the Certificates of such series as herein provided. 

(b) No Certificate of any series shall be entitled to any benefit under this Agreement, or be valid for any purpose, unless there appears on
such Certificate a certificate of authentication substantially in the form set forth in Exhibit A hereto executed by the Trustee by manual signature, and such certificate of authentication upon any Certificate shall be conclusive evidence, and the
only evidence, that such Certificate has been duly authenticated and delivered hereunder. All Certificates of any series shall be dated the date of their authentication. 

Section 3.03. Temporary Certificates. Until definitive Certificates are ready for delivery, the Trustee shall execute,
authenticate and deliver temporary Certificates of each series. Temporary Certificates of each series shall be substantially in the form of definitive Certificates of such series but may have insertions, substitutions, omissions and other variations
determined to be appropriate by the officers executing the temporary Certificates of such series, as evidenced by their execution of such temporary Certificates. If temporary Certificates of any series are issued, the Trustee will cause definitive
Certificates of such series to be prepared without unreasonable delay. After the preparation of definitive Certificates of such series, the temporary Certificates shall be exchangeable for definitive Certificates upon surrender of such temporary
Certificates at the office or agency of the Trustee designated for such purpose pursuant to Section 7.12, without charge to the Certificateholder. Upon surrender for cancellation of any one or more temporary Certificates, the Trustee shall
execute, authenticate and deliver in exchange therefor a like face amount of definitive Certificates of like series, in authorized denominations and of a like Fractional Undivided Interest. Until so exchanged, such temporary Certificates shall be
entitled to the same benefits under this Agreement as definitive Certificates. 
 Section 3.04. Transfer and Exchange. The
Trustee shall cause to be kept at the office or agency to be maintained by it in accordance with the provisions of Section 7.12 a register (the “Register”) for each series of Certificates in which, subject to such reasonable
regulations as it may prescribe, the Trustee shall provide for the registration of Certificates of such series and of transfers and exchanges of such Certificates as herein provided. The Trustee shall initially be the registrar (the
“Registrar”) for the purpose of registering such Certificates of each series and transfers and exchanges of such Certificates as herein provided. 

  
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 All Certificates issued upon any registration of transfer or exchange of Certificates of any
series shall be valid obligations of the applicable Trust, evidencing the same interest therein, and entitled to the same benefits under this Agreement, as the Certificates of such series surrendered upon such registration of transfer or exchange.

 Upon surrender for registration of transfer of any Certificate at the Corporate Trust Office or such other office or agency, the Trustee
shall execute, authenticate and deliver, in the name of the designated transferee or transferees, one or more new Certificates of like series, in authorized denominations of a like aggregate Fractional Undivided Interest. 

At the option of a Certificateholder, Certificates may be exchanged for other Certificates of like series, in authorized denominations and of
a like aggregate Fractional Undivided Interest, upon surrender of the Certificates to be exchanged at any such office or agency. Whenever any Certificates are so surrendered for exchange, the Trustee shall execute, authenticate and deliver the
Certificates that the Certificateholder making the exchange is entitled to receive. Every Certificate presented or surrendered for registration of transfer or exchange shall be duly endorsed or accompanied by a written instrument of transfer in form
satisfactory to the Trustee and the Registrar duly executed by the Certificateholder thereof or its attorney duly authorized in writing. 

No service charge shall be made to a Certificateholder for any registration of transfer or exchange of Certificates, but the Trustee shall
require payment of a sum sufficient to cover any tax or governmental charge that may be imposed in connection with any transfer or exchange of Certificates. All Certificates surrendered for registration of transfer or exchange shall be cancelled and
subsequently destroyed by the Trustee. 
 Section 3.05. Book-Entry and Definitive Certificates. (a) The Certificates of any
series may be issued in the form of one or more typewritten Certificates representing the Book-Entry Certificates of such series, to be delivered to The Depository Trust Company, the initial Clearing Agency, by, or on behalf of, the Company. In such
case, the Certificates of such series delivered to The Depository Trust Company shall initially be registered on the Register in the name of CEDE & Co., the nominee of the initial Clearing Agency, and no Certificate Owner will receive a
definitive certificate representing such Certificate Owner’s interest in the Certificates of such series, except as provided above and in Subsection (d) below. As to the Certificates of any series, unless and until definitive, fully
registered Certificates (the “Definitive Certificates”) have been issued pursuant to Subsection (d) below: 

(i) the provisions of this Section 3.05 shall be in full force and effect; 

(ii) the Company, the Paying Agent, the Registrar and the Trustee may deal with the Clearing Agency Participants for all
purposes (including the making of distributions on the Certificates) as the authorized representatives of the Certificate Owners; 

(iii) to the extent that the provisions of this Section 3.05 conflict with any other provisions of this Agreement (other
than the provisions of any Trust Supplement expressly amending this Section 3.05 as permitted by this Basic Agreement), the provisions of this Section 3.05 shall control; 

(iv) the rights of Certificate Owners shall be exercised only through the Clearing Agency and shall be limited to those
established by law and agreements between such Certificate Owners and the Clearing Agency Participants; and until Definitive Certificates are 

  
 17 

 
issued pursuant to Subsection (d) below, the Clearing Agency will make book-entry transfers among the Clearing Agency Participants and receive and transmit distributions of principal,
interest and premium, if any, on the Certificates to such Clearing Agency Participants; and 
 (v) whenever this Agreement
requires or permits actions to be taken based upon instructions or directions of Certificateholders of such series holding Certificates of such series evidencing a specified percentage of the Fractional Undivided Interests in the related Trust, the
Clearing Agency shall be deemed to represent such percentage only to the extent that it has received instructions to such effect from Clearing Agency Participants owning or representing, respectively, such required percentage of the beneficial
interest in Certificates of such series and has delivered such instructions to the Trustee. The Trustee shall have no obligation to determine whether the Clearing Agency has in fact received any such instructions. 

(b) Whenever notice or other communication to the Certificateholders of such series is required under this Agreement, unless and until
Definitive Certificates shall have been issued pursuant to Subsection (d) below, the Trustee shall give all such notices and communications specified herein to be given to Certificateholders of such series to the Clearing Agency. 

(c) Unless and until Definitive Certificates of a series are issued pursuant to Subsection (d) below, on the Record Date prior to each
applicable Regular Distribution Date and Special Distribution Date the Trustee will request from the Clearing Agency a securities position listing setting forth the names of all Clearing Agency Participants reflected on the Clearing Agency’s
books as holding interests in the Certificates on such Record Date. 
 (d) If with respect to the Certificates of any series (i) the
Company advises the Trustee in writing that the Clearing Agency is no longer willing or able to discharge properly its responsibilities and the Trustee or the Company is unable to locate a qualified successor, (ii) the Company, at its option,
advises the Trustee in writing that it elects to terminate the book-entry system through the Clearing Agency or (iii) after the occurrence of an Event of Default, Certificate Owners of Book-Entry Certificates of such series evidencing
Fractional Undivided Interests aggregating not less than a majority in interest in the related Trust, by Act of such Certificate Owners delivered to the Company and the Trustee, advise the Company, the Trustee and the Clearing Agency through the
Clearing Agency Participants in writing that the continuation of a book-entry system through the Clearing Agency Participants is no longer in the best interests of the Certificate Owners of such series, then the Trustee shall notify all Certificate
Owners of such series, through the Clearing Agency, of the occurrence of any such event and of the availability of Definitive Certificates. Upon surrender to the Trustee of all the Certificates of such series held by the Clearing Agency, accompanied
by registration instructions from the Clearing Agency Participants for registration of Definitive Certificates in the names of Certificate Owners of such series, the Trustee shall issue and deliver the Definitive Certificates of such series in
accordance with the instructions of the Clearing Agency. Neither the Company, the Registrar, the Paying Agent nor the Trustee shall be liable for any delay in delivery of such instructions and may conclusively rely on, and shall be protected in
relying on, such registration instructions. Upon the issuance of Definitive Certificates of such series, the Trustee shall recognize the Person in whose name the Definitive Certificates are registered in the Register as Certificateholders hereunder.
Neither the Company nor the Trustee shall be liable if the Trustee or the Company is unable to locate a qualified successor Clearing Agency. 

  
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 (e) Except as otherwise provided in the related Trust Supplement, the Trustee shall enter into
the applicable Letter of Representations with respect to such series of Certificates and fulfill its responsibilities thereunder. 
 (f)
The provisions of this Section 3.05 may be made inapplicable to any series or may be amended with respect to any series in the related Trust Supplement. 

Section 3.06. Mutilated, Destroyed, Lost or Stolen Certificates. If (a) any mutilated Certificate is surrendered to the
Registrar, or the Registrar receives evidence to its satisfaction of the destruction, loss or theft of any Certificate, and (b) there is delivered to the Registrar and the Trustee such security, indemnity or bond, as may be required by them to
save each of them and the Company harmless, then, in the absence of notice to the Registrar or the Trustee that such destroyed, lost or stolen Certificate has been acquired by a bona fide purchaser, and provided, however, that
the requirements of Section 8-405 of the Uniform Commercial Code in effect in any applicable jurisdiction are met, the Trustee shall execute, authenticate and deliver, in exchange for or in lieu of any such mutilated, destroyed, lost or stolen
Certificate, a new Certificate or Certificates of like series, in authorized denominations and of like Fractional Undivided Interest and bearing a number not contemporaneously outstanding. 

In connection with the issuance of any new Certificate under this Section 3.06, the Trustee shall require the payment of a sum sufficient
to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the Trustee and the Registrar) connected therewith. 

Any duplicate Certificate issued pursuant to this Section 3.06 shall constitute conclusive evidence of the appropriate Fractional
Undivided Interest in the related Trust, as if originally issued, whether or not the lost, stolen or destroyed Certificate shall be found at any time. 

The provisions of this Section 3.06 are exclusive and shall preclude (to the extent lawful) all other rights and remedies with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Certificates. 
 Section 3.07. Persons Deemed Owners. Prior
to due presentment of a Certificate for registration of transfer, the Company, the Trustee, the Registrar and any Paying Agent may treat the Person in whose name any Certificate is registered (as of the day of determination) as the owner of such
Certificate for the purpose of receiving distributions pursuant to Article IV and for all other purposes whatsoever, and none of the Trustee, the Registrar or any Paying Agent shall be affected by any notice to the contrary. 

Section 3.08. Cancellation. All Certificates surrendered for payment or transfer or exchange shall, if surrendered to the Trustee
or any agent of the Trustee other than the Registrar, be delivered to the Registrar for cancellation and shall promptly be cancelled by it. No Certificates shall be authenticated in lieu of or in exchange for any Certificates cancelled as provided
in this Section 3.08, except as expressly permitted by this Agreement. All cancelled Certificates held by the Registrar shall be destroyed and a certification of their destruction delivered to the Trustee. 

Section 3.09. Limitation of Liability for Payments. All payments and distributions made to Certificateholders of any series in
respect of the Certificates of such series shall be made only from the Trust Property of the related Trust and only to the extent that the Trustee shall have sufficient 

  
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income or proceeds from such Trust Property to make such payments in accordance with the terms of Article IV of this Agreement. Each Certificateholder, by its acceptance of a Certificate, agrees
that it will look solely to the income and proceeds from the Trust Property of the related Trust for any payment or distribution due to such Certificateholder pursuant to the terms of this Agreement and that it will not have any recourse to the
Company, the Trustee, the Loan Trustees, the Owner Trustees or the Owner Participants, except as otherwise expressly provided herein or in the related Intercreditor Agreement. 

The Company is a party to this Agreement solely for purposes of meeting the requirements of the Trust Indenture Act, and therefore shall not
have any right, obligation or liability hereunder (except as otherwise expressly provided herein). 
 ARTICLE IV 

DISTRIBUTIONS; STATEMENTS TO CERTIFICATEHOLDERS 

Section 4.01. Certificate Account and Special Payments Account. (a) The Trustee shall establish and maintain on behalf of the
Certificateholders of each series a Certificate Account as one or more non-interest-bearing accounts. The Trustee shall hold such Certificate Account in trust for the benefit of the Certificateholders of such series, and shall make or permit
withdrawals therefrom only as provided in this Agreement. On each day when a Scheduled Payment is made to the Trustee (under an Intercreditor Agreement, if applicable) with respect to the Certificates of such series, the Trustee, upon receipt
thereof, shall immediately deposit the aggregate amount of such Scheduled Payment in such Certificate Account. 
 (b) The Trustee shall
establish and maintain on behalf of the Certificateholders of each series a Special Payments Account as one or more accounts, which shall be non-interest bearing except as provided in Section 4.04. The Trustee shall hold the Special Payments
Account in trust for the benefit of the Certificateholders of such series and shall make or permit withdrawals therefrom only as provided in this Agreement. On each day when one or more Special Payments are made to the Trustee (under an
Intercreditor Agreement, if applicable) with respect to the Certificates of such series, the Trustee, upon receipt thereof, shall immediately deposit the aggregate amount of such Special Payments in such Special Payments Account. 

(c) The Trustee shall present (or, if applicable, cause the Subordination Agent to present) to the related Loan Trustee of each Equipment
Note such Equipment Note on the date of its stated final maturity or, in the case of any Equipment Note which is to be redeemed in whole pursuant to the related Indenture, on the applicable redemption date under such Indenture. 

Section 4.02. Distributions from Certificate Account and Special Payments Account. (a) On each Regular Distribution Date with
respect to a series of Certificates or as soon thereafter as the Trustee has confirmed receipt of the payment of all or any part of the Scheduled Payments due on the Equipment Notes held (subject to the Intercreditor Agreement) in the related Trust
on such date, the Trustee shall distribute out of the applicable Certificate Account the entire amount deposited therein pursuant to Section 4.01(a). There shall be so distributed to each Certificateholder of record of such series on the Record
Date with respect to such Regular Distribution Date (other than as provided in Section 11.01 concerning the final distribution) by check mailed to such Certificateholder, at the address appearing in the Register, such Certificateholder’s
pro rata share (based on the Fractional Undivided Interest in the Trust held by such Certificateholder) of the total amount in the applicable Certificate Account, except that, with respect to Certificates registered on the Record Date in the name of
a Clearing Agency (or its nominee), such distribution shall be made by wire transfer in immediately available funds to the account designated by such Clearing Agency (or such nominee). 

  
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 (b) On each Special Distribution Date with respect to any Special Payment with respect to a
series of Certificates or as soon thereafter as the Trustee has confirmed receipt of any Special Payments due on the Equipment Notes held (subject to the Intercreditor Agreement) in the related Trust or realized upon the sale of such Equipment
Notes, the Trustee shall distribute out of the applicable Special Payments Account the entire amount of such applicable Special Payment deposited therein pursuant to Section 4.01(b). There shall be so distributed to each Certificateholder of
record of such series on the Record Date with respect to such Special Distribution Date (other than as provided in Section 11.01 concerning the final distribution) by check mailed to such Certificateholder, at the address appearing in the
Register, such Certificateholder’s pro rata share (based on the Fractional Undivided Interest in the related Trust held by such Certificateholder) of the total amount in the applicable Special Payments Account on account of such Special
Payment, except that, with respect to Certificates registered on the Record Date in the name of a Clearing Agency (or its nominee), such distribution shall be made by wire transfer in immediately available funds to the account designated by such
Clearing Agency (or such nominee). 
 (c) The Trustee shall, at the expense of the Company, cause notice of each Special Payment with
respect to a series of Certificates to be mailed to each Certificateholder of such series at his address as it appears in the Register. In the event of redemption or purchase of Equipment Notes held in the related Trust, such notice shall be mailed
not less than 15 days prior to the Special Distribution Date for the Special Payment resulting from such redemption or purchase, which Special Distribution Date shall be the date of such redemption or purchase. In the event that the Trustee receives
a notice from the Company that Postponed Notes will not be purchased by the Trustee pursuant to Section 2.02, such notice of Special Payment shall be mailed as soon as practicable after receipt of such notice from the Company and shall state
the Special Distribution Date for such Special Payment, which shall occur 15 days after the date of such notice of Special Payment or (if such 15th day is not practicable) as soon as practicable thereafter. In the event that any Special Payment is
to be made pursuant to the last paragraph of Section 2.02(b) hereof, there shall be mailed on the Cut-off Date (or, if such mailing on the Cut-off Date is not practicable, as soon as practicable after the Cut-off Date), notice of such Special
Payment stating the Special Distribution Date for such Special Payment, which shall occur 15 days after the date of such notice of such Special Payment (or, if such 15th day is not practicable, as soon as practicable thereafter). In the case of any
other Special Payments, such notice shall be mailed as soon as practicable after the Trustee has confirmed that it has received funds for such Special Payment, stating the Special Distribution Date for such Special Payment which shall occur not less
than 15 days after the date of such notice and as soon as practicable thereafter. Notices mailed by the Trustee shall set forth: 

(i) the Special Distribution Date and the Record Date therefor (except as otherwise provided in Section 11.01), 

(ii) the amount of the Special Payment (taking into account any payment to be made by the Company pursuant to
Section 2.02(b)) for each $1,000 face amount Certificate and the amount thereof constituting principal, premium, if any, and interest, 

(iii) the reason for the Special Payment, and 

(iv) if the Special Distribution Date is the same date as a Regular Distribution Date for the Certificates of such series, the
total amount to be received on such date for each $1,000 face amount Certificate. 

  
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 If the amount of premium, if any, payable upon the redemption or purchase of an Equipment Note has not been
calculated at the time that the Trustee mails notice of a Special Payment, it shall be sufficient if the notice sets forth the other amounts to be distributed and states that any premium received will also be distributed. 

If any redemption of the Equipment Notes held in any Trust is cancelled, the Trustee, as soon as possible after learning thereof, shall cause
notice thereof to be mailed to each Certificateholder of the related series at its address as it appears on the Register. 

Section 4.03. Statements to Certificateholders. (a) On each Regular Distribution Date and Special Distribution Date, the
Trustee will include with each distribution of a Scheduled Payment or Special Payment, as the case may be, to Certificateholders of the related series a statement setting forth the information provided below. Such statement shall set forth (per
$1,000 aggregate face amount of Certificate as to (i) and (ii) below) the following information: 
 (i) the amount
of such distribution hereunder allocable to principal and the amount allocable to premium, if any; 
 (ii) the amount of such
distribution hereunder allocable to interest; and 
 (iii) the Pool Balance and the Pool Factor of the related Trust. 

With respect to the Certificates registered in the name of a Clearing Agency or its nominee, on the Record Date prior to each Distribution
Date, the Trustee will request from the Clearing Agency a securities position listing setting forth the names of all the Clearing Agency Participants reflected on the Clearing Agency’s books as holding interests in the Certificates on such
Record Date. On each Distribution Date, the applicable Trustee will mail to each such Clearing Agency Participant the statement described above and will make available additional copies as requested by such Clearing Agency Participant for forwarding
to holders of interests in the Certificates. 
 (b) Within a reasonable period of time after the end of each calendar year but not later
than the latest date permitted by law, except to the extent otherwise provided in the applicable Trust Supplement, the Trustee shall furnish to each Person who at any time during such calendar year was a Certificateholder of record a statement
containing the sum of the amounts determined pursuant to clauses (a)(i) and (a)(ii) above with respect to the related Trust for such calendar year or, in the event such Person was a Certificateholder of record during a portion of such calendar year,
for the applicable portion of such year, and such other items as are readily available to the Trustee and which a Certificateholder shall reasonably request as necessary for the purpose of such Certificateholder’s preparation of its federal
income tax returns. With respect to Certificates registered in the name of a Clearing Agency or its nominee, such statement and such other items shall be prepared on the basis of information supplied to the Trustee by the Clearing Agency
Participants and shall be delivered by the Trustee to such Clearing Agency Participants to be available for forwarding by such Clearing Agency Participants to the holders of interests in the Certificates in the manner described in
Section 4.03(a). 

  
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 Section 4.04. Investment of Special Payment Moneys. Any money received by the Trustee
pursuant to Section 4.01(b) representing a Special Payment which is not distributed on the date received shall, to the extent practicable, be invested in Permitted Investments by the Trustee pending distribution of such Special Payment pursuant
to Section 4.02. Any investment made pursuant to this Section 4.04 shall be in such Permitted Investments having maturities not later than the date that such moneys are required to be used to make the payment required under
Section 4.02 on the applicable Special Distribution Date and the Trustee shall hold any such Permitted Investments until maturity. The Trustee shall have no liability with respect to any investment made pursuant to this Section 4.04, other
than by reason of the willful misconduct or negligence of the Trustee. All income and earnings from such investments shall be distributed on such Special Distribution Date as part of such Special Payment. 

ARTICLE V 
 THE COMPANY

 Section 5.01. Maintenance of Corporate Existence. The Company, at its own cost and expense, will do or cause to be done
all things necessary to preserve and keep in full force and effect its corporate existence, rights and franchises, except as otherwise specifically permitted in Section 5.02; provided, however, that the Company shall not be
required to preserve any right or franchise if the Company shall determine that the preservation thereof is no longer desirable in the conduct of the business of the Company. 

Section 5.02. Consolidation, Merger, Etc. The Company shall not consolidate with or merge into any other Person or convey,
transfer or lease substantially all of its assets as an entirety to any Person unless: 
 (a) the Person formed by such consolidation or
into which the Company is merged or the Person that acquires by conveyance, transfer or lease substantially all of the assets of the Company as an entirety shall be (i) organized and validly existing under the laws of the United States of
America or any state thereof or the District of Columbia, (ii) a “citizen of the United States” as defined in 49 U.S.C. § 40102(a)(15), as amended, and (iii) a United States certificated air carrier, if and so long as such
status is a condition of entitlement to the benefits of Section 1110 of the Bankruptcy Reform Act of 1978, as amended (11 U.S.C. § 1110), with respect to the Leases or the Aircraft owned by the Company; 

(b) the Person formed by such consolidation or into which the Company is merged or the Person which acquires by conveyance, transfer or lease
substantially all of the assets of the Company as an entirety shall execute and deliver to the Trustee applicable to the Certificates of each series a duly authorized, valid, binding and enforceable agreement in form and substance reasonably
satisfactory to the Trustee containing an assumption by such successor corporation or Person of the due and punctual performance and observance of each covenant and condition of the Note Documents and of this Agreement applicable to the Certificates
of each series to be performed or observed by the Company; and 
 (c) the Company shall deliver to the Trustee an Officer’s
Certificate of the Company and an Opinion of Counsel of the Company reasonably satisfactory to the Trustee, each stating that such consolidation, merger, conveyance, transfer or lease and the assumption agreement mentioned in clause (b) above
comply with this Section 5.02 and that all conditions precedent herein provided for relating to such transaction have been complied with. 

  
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 Upon any consolidation or merger, or any conveyance, transfer or lease of substantially all of
the assets of the Company as an entirety in accordance with this Section 5.02, the successor Person formed by such consolidation or into which the Company is merged or to which such conveyance, transfer or lease is made shall succeed to, and be
substituted for, and may exercise every right and power of, the Company under this Agreement applicable to the Certificates of each series with the same effect as if such successor Person had been named as the Company herein. No such conveyance,
transfer or lease of substantially all of the assets of the Company as an entirety shall have the effect of releasing any successor Person which shall have become such in the manner prescribed in this Section 5.02 from its liability in respect
of this Agreement and any Note Document applicable to the Certificates of such series to which it is a party. 
 ARTICLE VI 

DEFAULT 

Section 6.01. Events of Default. (a) Exercise of Remedies. Upon the occurrence and during the continuation of any
Indenture Event of Default under any Indenture, the Trustee may (i) to the extent it is the Controlling Party at such time (as determined pursuant to the related Intercreditor Agreement), direct the exercise of remedies as provided in such
related Intercreditor Agreement and (ii) if there is no related Intercreditor Agreement, direct the exercise of remedies or take other action as provided in the relevant Indenture to the extent that it may do so as the holder of the Equipment
Notes issued under such Indenture and held in the related Trust. 
 (b) Purchase Rights of Certificateholders. At any time after the
occurrence and during the continuation of a Triggering Event, each Certificateholder of Certificates of certain series (each, a “Potential Purchaser” and, collectively, the “Potential Purchasers”) will have certain
rights to purchase the Certificates of one or more other series, all as set forth in the Trust Supplement applicable to the Certificates held by such Potential Purchaser. The purchase price with respect to the Certificates of any series shall be
equal to the Pool Balance of the Certificates of such series, together with accrued and unpaid interest thereon to the date of such purchase, without premium, but including any other amounts then due and payable to the Certificateholders of such
series under this Agreement, any related Intercreditor Agreement or any other Note Document or on or in respect of the Certificates of such series; provided, however, that if such purchase occurs after a Record Date, such purchase
price shall be reduced by the amount to be distributed hereunder on the related Distribution Date (which deducted amounts shall remain distributable to, and may be retained by, the Certificateholder as of such Record Date); provided,
further, that no such purchase of Certificates of such series shall be effective unless the purchasing Certificateholder (each, a “Purchasing Certificateholder” and, collectively, the “Purchasing
Certificateholders”) shall certify to the Trustee that contemporaneously with such purchase, one or more Purchasing Certificateholders are purchasing, pursuant to the terms of this Agreement and the other Agreements, if any, relating to the
Certificates of a series that are subject to the same Intercreditor Agreement (such other Agreements, the “Other Agreements”), the Certificates of each such series that the Trust Supplement applicable to the Certificates held by the
Purchasing Certificateholder specifies may be purchased by such Purchasing Certificateholder. Each payment of the purchase price of the Certificates of any series shall be made to an account or accounts designated by the Trustee and each such
purchase shall be subject to the terms of this Section 6.01. By acceptance of its Certificate, each Certificateholder (each, a “Selling Certificateholder” and, collectively, the “Selling Certificateholders”) of
a series that is subject to purchase by Potential Purchasers, all as set forth in the Trust Supplement applicable to the Certificates held by the Selling Certificateholders, agrees that, at any time after the occurrence and during the continuance of
a Triggering Event, it will, upon payment of the purchase price specified herein by one or more Purchasing Certificateholders, forthwith sell, assign, transfer and 

  
 24 

 
convey to such Purchasing Certificateholder (without recourse, representation or warranty of any kind except for its own acts), all of the right, title, interest and obligation of such Selling
Certificateholder in this Agreement, any related Intercreditor Agreement, the related Liquidity Facility, the related Note Documents and all Certificates of such series held by such Selling Certificateholder (excluding all right, title and interest
under any of the foregoing to the extent such right, title or interest is with respect to an obligation not then due and payable as respects any action or inaction or state of affairs occurring prior to such sale) and the Purchasing
Certificateholder shall assume all of such Selling Certificateholder’s obligations under this Agreement, any related Intercreditor Agreement, the related Liquidity Facility and the related Note Documents. The Certificates of such series will be
deemed to be purchased on the date payment of the purchase price is made notwithstanding the failure of any Selling Certificateholder to deliver any Certificates of such series and, upon such a purchase, (i) the only rights of the Selling
Certificateholders will be to deliver the Certificates to the Purchasing Certificateholder and receive the purchase price for such Certificates of such series and (ii) if the Purchasing Certificateholder shall so request, such Selling
Certificateholder will comply with all of the provisions of Section 3.04 hereof to enable new Certificates of such series to be issued to the Purchasing Certificateholder in such denominations as it shall request. All charges and expenses in
connection with the issuance of any such new Certificates shall be borne by the Purchasing Certificateholder. 
 Section 6.02.
Incidents of Sale of Equipment Notes. Upon any sale of all or any part of the Equipment Notes held in the Trust made either under the power of sale given under this Agreement or otherwise for the enforcement of this Agreement, the following
shall be applicable: 
 (1) Certificateholders and Trustee May Purchase Equipment Notes. Any Certificateholder, the
Trustee in its individual or any other capacity or any other Person may bid for and purchase any of the Equipment Notes held in the Trust, and upon compliance with the terms of sale, may hold, retain, possess and dispose of such Equipment Notes in
their own absolute right without further accountability. 
 (2) Receipt of Trustee Shall Discharge Purchaser. The
receipt of the Trustee making such sale shall be a sufficient discharge to any purchaser for his purchase money, and, after paying such purchase money and receiving such receipt, such purchaser or its personal representative or assigns shall not be
obliged to see to the application of such purchase money, or be in any way answerable for any loss, misapplication or non-application thereof. 

(3) Application of Moneys Received upon Sale. Any moneys collected by the Trustee upon any sale made either under the
power of sale given by this Agreement or otherwise for the enforcement of this Agreement shall be applied as provided in Section 4.02. 

Section 6.03. Judicial Proceedings Instituted by Trustee; Trustee May Bring Suit. If there shall be a failure to make payment of
the principal of, premium, if any, or interest on any Equipment Note held in the related Trust, or if there shall be any failure to pay Rent (as defined in the relevant Lease) under any Lease when due and payable, then the Trustee, in its own name
and as trustee of an express trust, as holder of such Equipment Notes, to the extent permitted by and in accordance with the terms of any related Intercreditor Agreement and any related Note Documents (subject to rights of the applicable Owner
Trustee or Owner Participant to cure any such failure to pay principal of, premium, if any, or interest on any Equipment Note or to pay Rent under any Lease in accordance with the applicable Indenture), shall be entitled and empowered to institute
any suits, actions or proceedings at law, in equity or otherwise, for the collection of the sums so due and unpaid on such Equipment Notes or under such Lease and may prosecute any such claim or proceeding to judgment or final decree with respect to
the whole amount of any such sums so due and unpaid. 

  
 25 

 Section 6.04. Control by Certificateholders. Subject to Section 6.03 and any
related Intercreditor Agreement, the Certificateholders holding Certificates of a series evidencing Fractional Undivided Interests aggregating not less than a majority in interest in the related Trust shall have the right to direct the time, method
and place of conducting any proceeding for any remedy available to the Trustee with respect to such Trust or pursuant to the terms of such Intercreditor Agreement, or exercising any trust or power conferred on the Trustee under this Agreement or
such Intercreditor Agreement, including any right of the Trustee as Controlling Party under such Intercreditor Agreement or as holder of the Equipment Notes held in the related Trust; provided, however, that 

(1) such Direction shall not in the opinion of the Trustee be in conflict with any rule of law or with this Agreement and
would not involve the Trustee in personal liability or expense, unless the Person(s) issuing such Direction shall provide the Trustee with an indemnity against such liability or expense satisfactory to the Trustee in its sole discretion, 

(2) the Trustee shall not determine that the action so directed would be unjustly prejudicial to the Certificateholders of
such series not taking part in such Direction, and 
 (3) the Trustee may take any other action deemed proper by the Trustee
which is not inconsistent with such Direction. 
 Section 6.05. Waiver of Past Defaults. Subject to any related Intercreditor
Agreement, the Certificateholders holding Certificates of a series evidencing Fractional Undivided Interests aggregating not less than a majority in interest in the Trust (i) may on behalf of all of the Certificateholders of such series waive
any past default or Event of Default hereunder and its consequences or (ii) if the Trustee is the Controlling Party, may direct the Trustee to instruct the applicable Loan Trustee to waive any past default or Indenture Event of Default under
any related Indenture and its consequences, and thereby annul any Direction given by such Certificateholders or the Trustee to such Loan Trustee with respect thereto, except a default: 

(1) in the deposit of any Scheduled Payment or Special Payment under Section 4.01 or in the distribution of any payment
under Section 4.02 on the Certificates of a series, or 
 (2) in the payment of the principal of (premium, if any) or
interest on the Equipment Notes held in the related Trust, or 
 (3) in respect of a covenant or provision hereof which
under Article IX hereof cannot be modified or amended without the consent of each Certificateholder holding an Outstanding Certificate of a series affected thereby. 

Upon any such waiver, such default shall cease to exist with respect to the Certificates of such series and any Event of Default arising therefrom shall be
deemed to have been cured for every purpose and any direction given by the Trustee on behalf of the Certificateholders of such series to the relevant Loan Trustee shall be annulled with respect thereto; but no such waiver shall extend to any
subsequent or other default or Event of Default or impair any right consequent thereon. Upon any such waiver, the Trustee shall vote the Equipment Notes issued under the relevant Indenture to waive the corresponding Indenture Event of Default. 

  
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 Section 6.06. Right of Certificateholders to Receive Payments Not to Be Impaired.
Anything in this Agreement to the contrary notwithstanding, including, without limitation, Section 6.07 hereof, but subject to any related Intercreditor Agreement, the right of any Certificateholder to receive distributions of payments required
pursuant to Section 4.02 hereof on the applicable Certificates when due, or to institute suit for the enforcement of any such payment on or after the applicable Regular Distribution Date or Special Distribution Date, shall not be impaired or
affected without the consent of such Certificateholder. 
 Section 6.07. Certificateholders May Not Bring Suit Except Under Certain
Conditions. A Certificateholder of any series shall not have the right to institute any suit, action or proceeding at law or in equity or otherwise with respect to this Agreement, for the appointment of a receiver or for the enforcement of any
other remedy under this Agreement, unless: 
 (1) such Certificateholder previously shall have given written notice to the
Trustee of a continuing Event of Default; 
 (2) Certificateholders holding Certificates of such series evidencing
Fractional Undivided Interests aggregating not less than 25% of the related Trust shall have requested the Trustee in writing to institute such action, suit or proceeding and shall have offered to the Trustee indemnity as provided in
Section 7.03(e); 
 (3) the Trustee shall have refused or neglected to institute any such action, suit or proceeding
for 60 days after receipt of such notice, request and offer of indemnity; and 
 (4) no Direction inconsistent with such
written request shall have been given to the Trustee during such 60-day period by Certificateholders holding Certificates of such series evidencing Fractional Undivided Interests aggregating not less than a majority in interest in the related Trust.

 It is understood and intended that no one or more of the Certificateholders of any series shall have any right in any manner whatsoever
hereunder or under the related Trust Supplement or under the Certificates of such series to (i) surrender, impair, waive, affect, disturb or prejudice any property in the Trust Property of the related Trust, or the lien of any related Indenture
on any property subject thereto, or the rights of the Certificateholders of such series or the holders of the related Equipment Notes, (ii) obtain or seek to obtain priority over or preference with respect to any other such Certificateholder of
such series or (iii) enforce any right under this Agreement, except in the manner herein provided and for the equal, ratable and common benefit of all the Certificateholders of such series subject to the provisions of this Agreement. 

Section 6.08. Remedies Cumulative. Every remedy given hereunder to the Trustee or to any of the Certificateholders of any series
shall not be exclusive of any other remedy or remedies, and every such remedy shall be cumulative and in addition to every other remedy given hereunder or now or hereafter given by statute, law, equity or otherwise. 

  
 27 

 Section 6.09. Undertaking for Costs. In any suit for the enforcement of any right or
remedy under this Agreement, or in any suit against the Trustee for any action taken, suffered or omitted by it as Trustee, a court may require any party litigant in such suit to file an undertaking to pay the costs of such suit, and may assess
costs against any such party litigant, in the manner and to the extent provided in the Trust Indenture Act; provided, however, that neither this Section 6.09 nor the Trust Indenture Act shall be deemed to authorize any court to
require such an undertaking or to make such an assessment in any suit instituted by the Company. 
 ARTICLE VII 

THE TRUSTEE 

Section 7.01. Certain Duties and Responsibilities. (a) Except during the continuance of an Event of Default in respect of a
Trust, the Trustee undertakes to perform such duties in respect of such Trust as are specifically set forth in this Agreement, and no implied covenants or obligations shall be read into this Agreement against the Trustee. 

(b) In case an Event of Default in respect of a Trust has occurred and is continuing, the Trustee shall exercise such of the rights and
powers vested in it by this Agreement in respect of such Trust, and use the same degree of care and skill in their exercise, as a prudent man would exercise or use under the circumstances in the conduct of his own affairs. 

(c) No provision of this Agreement shall be construed to relieve the Trustee from liability for its own negligent action, its own negligent
failure to act, or its own willful misconduct, except that 
 (1) this Subsection shall not be construed to limit the effect
of Subsection (a)of this Section 7.01; and 
 (2) the Trustee shall not be liable for any error of judgment made in
good faith by a Responsible Officer of the Trustee, unless it shall be proved that the Trustee was negligent in ascertaining the pertinent facts. 

(d) Whether or not herein expressly so provided, every provision of this Agreement relating to the conduct or affecting the liability of or
affording protection to the Trustee shall be subject to the provisions of this Section 7.01. 
 Section 7.02. Notice of
Defaults. As promptly as practicable after, and in any event within 90 days after, the occurrence of any default (as such term is defined below) hereunder known to the Trustee, the Trustee shall transmit by mail to the Company, any related Owner
Trustees, any related Owner Participants, the related Loan Trustees and the Certificateholders holding Certificates of the related series in accordance with Section 313(c) of the Trust Indenture Act, notice of such default hereunder known to
the Trustee, unless such default shall have been cured or waived; provided, however, that, except in the case of a default in the payment of the principal, premium, if any, or interest on any Equipment Note, the Trustee shall be
protected in withholding such notice if and so long as the board of directors, the executive committee or a trust committee of directors and/or Responsible Officers of the Trustee in good faith shall determine that the withholding of such notice is
in the interests of the Certificateholders of the related series. For the purpose of this Section 7.02 in respect of any Trust, the term “default” means any event that is, or after notice or lapse of time or both would become,
an Event of Default in respect of that Trust. 

  
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 Section 7.03. Certain Rights of Trustee. Subject to the provisions of
Section 315 of the Trust Indenture Act: 
 (a) the Trustee may rely and shall be protected in acting or refraining from acting in
reliance upon any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture or other paper or document believed by it to be genuine and to have been signed or presented by the proper
party or parties; 
 (b) any request or direction of the Company mentioned herein shall be sufficiently evidenced by a Request; 

(c) whenever in the administration of this Agreement or any Intercreditor Agreement, the Trustee shall deem it desirable that a matter be
proved or established prior to taking, suffering or omitting any action hereunder, the Trustee (unless other evidence be herein specifically prescribed) may, in the absence of bad faith on its part, rely upon an Officer’s Certificate of the
Company, any related Owner Trustee or any related Loan Trustee; 
 (d) the Trustee may consult with counsel and the advice of such counsel
or any Opinion of Counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted by it hereunder in good faith and in reliance thereon; 

(e) the Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Agreement or any Intercreditor
Agreement at the Direction of any of the Certificateholders pursuant to this Agreement or any Intercreditor Agreement, unless such Certificateholders shall have offered to the Trustee reasonable security or indemnity against the cost, expenses and
liabilities which might be incurred by it in compliance with such Direction; 
 (f) the Trustee shall not be bound to make any
investigation into the facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture or other paper or document; 

(g) the Trustee may execute any of the trusts or powers under this Agreement or any Intercreditor Agreement or perform any duties under this
Agreement or any Intercreditor Agreement either directly or by or through agents or attorneys, and the Trustee shall not be responsible for any misconduct or negligence on the part of any agent or attorney appointed with due care by it under this
Agreement or any Intercreditor Agreement; 
 (h) the Trustee shall not be liable with respect to any action taken or omitted to be taken by
it in good faith in accordance with the Direction of the Certificateholders holding Certificates of any series evidencing Fractional Undivided Interests aggregating not less than a majority in interest in the related Trust relating to the time,
method and place of conducting any proceeding for any remedy available to the Trustee, or exercising any trust or power conferred upon the Trustee, under this Agreement or any Intercreditor Agreement; and 

(i) the Trustee shall not be required to expend or risk its own funds in the performance of any of its duties under this Agreement, or in the
exercise of any of its rights or powers, if it shall have reasonable grounds for believing that repayment of such funds or adequate indemnity against such risk is not reasonably assured to it. 

  
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 Section 7.04. Not Responsible for Recitals or Issuance of Certificates. The recitals
contained herein and in the Certificates of each series, except the certificates of authentication, shall not be taken as the statements of the Trustee, and the Trustee assumes no responsibility for their correctness. Subject to Section 7.15,
the Trustee makes no representations as to the validity or sufficiency of this Basic Agreement, any Equipment Notes, any Intercreditor Agreement, the Certificates of any series, any Trust Supplement or any Note Documents, except that the Trustee
hereby represents and warrants that this Basic Agreement has been, and each Trust Supplement, each Certificate, each Note Purchase Agreement and each Intercreditor Agreement of, or relating to, each series will be executed and delivered by one of
its officers who is duly authorized to execute and deliver such document on its behalf. 
 Section 7.05. May Hold
Certificates. The Trustee, any Paying Agent, Registrar or any of their Affiliates or any other agent, in their respective individual or any other capacity, may become the owner or pledgee of Certificates and, subject to Sections 310(b) and 311
of the Trust Indenture Act, if applicable, may otherwise deal with the Company, any Owner Trustees or the Loan Trustees with the same rights it would have if it were not Trustee, Paying Agent, Registrar or such other agent. 

Section 7.06. Money Held in Trust. Money held by the Trustee or the Paying Agent in trust under this Agreement need not be
segregated from other funds except to the extent required herein or by law and neither the Trustee nor the Paying Agent shall have any liability for interest upon any such moneys except as provided for herein. 

Section 7.07. Compensation and Reimbursement. The Company agrees: 

(1) to pay, or cause to be paid, to the Trustee from time to time reasonable compensation for all services rendered by it
hereunder (which compensation shall not be limited by any provision of law in regard to the compensation of a trustee of an express trust); and 

(2) except as otherwise expressly provided herein or in any Trust Supplement, to reimburse, or cause to be reimbursed, the
Trustee upon its request for all reasonable out-of-pocket expenses, disbursements and advances incurred or made by the Trustee in accordance with any provision of this Basic Agreement, any Trust Supplement or any Intercreditor Agreement (including
the reasonable compensation and the expenses and disbursements of its agents and counsel), except any such expense, disbursement or advance as may be attributable to its negligence, willful misconduct or bad faith or as may be incurred due to the
Trustee’s breach of its representations and warranties set forth in Section 7.15; and 
 (3) to indemnify, or
cause to be indemnified, the Trustee with respect to the Certificates of any series, pursuant to the particular sections of the Note Purchase Agreements specified in the related Trust Supplement. 

The Trustee shall be entitled to reimbursement from, and shall have a lien prior to the Certificates of each series upon, all property and
funds held or collected by the Trustee in its capacity as Trustee with respect to such series or the related Trust for any tax incurred without negligence, bad faith or willful misconduct, on its part, arising out of or in connection with the
acceptance or administration of such Trust (other than any tax attributable to the Trustee’s compensation for serving as such), including any costs and expenses incurred in contesting the imposition of any such tax. The Trustee shall notify the
Company of any claim for any tax for which it may seek reimbursement. If the Trustee 

  
 30 

 
reimburses itself from the Trust Property of such Trust for any such tax, it will mail a brief report within 30 days setting forth the amount of such tax and the circumstances thereof to the
Company and all Certificateholders of such series as their names and addresses appear in the Register. 
 Section 7.08. Corporate
Trustee Required; Eligibility. Each Trust shall at all times have a Trustee which shall be eligible to act as a trustee under Section 310(a) of the Trust Indenture Act and shall have a combined capital and surplus of at least $75,000,000
(or a combined capital and surplus in excess of $5,000,000 and the obligations of which, whether now in existence or hereafter incurred, are fully and unconditionally guaranteed by a corporation organized and doing business under the laws of the
United States, any state or territory thereof or of the District of Columbia and having a combined capital and surplus of at least $75,000,000). If such corporation publishes reports of conditions at least annually, pursuant to law or to the
requirements of federal, state, territorial or District of Columbia supervising or examining authority, then for the purposes of this Section 7.08 the combined capital and surplus of such corporation shall be deemed to be its combined capital
and surplus as set forth in its most recent report of conditions so published. 
 In case at any time the Trustee shall cease to be eligible
in accordance with the provisions of this Section 7.08 to act as Trustee of any Trust, the Trustee shall resign immediately as Trustee of such Trust in the manner and with the effect specified in Section 7.09. 

Section 7.09. Resignation and Removal; Appointment of Successor. (a) No resignation or removal of the Trustee and no
appointment of a successor Trustee of any Trust pursuant to this Article shall become effective until the acceptance of appointment by the successor Trustee under Section 7.10. 

(b) The Trustee may resign at any time as Trustee of any or all Trusts by giving prior written notice thereof to the Company, the Authorized
Agents, the related Owner Trustees and the related Loan Trustees. If an instrument of acceptance by a successor Trustee shall not have been delivered to the Company, the related Owner Trustees and the Trustee within 30 days after the giving of such
notice of resignation, the resigning Trustee may petition any court of competent jurisdiction for the appointment of a successor Trustee. 

(c) The Trustee may be removed at any time by Direction of the Certificateholders of the related series holding Certificates evidencing
Fractional Undivided Interests aggregating not less than a majority in interest in such Trust delivered to the Trustee and to the Company, the related Owner Trustees and the related Loan Trustees. 

(d) If at any time in respect of any Trust: 

(1) the Trustee shall fail to comply with Section 310 of the Trust Indenture Act, if applicable, after written request
therefor by the Company or by any Certificateholder who has been a bona fide Certificateholder for at least six months; or 

(2) the Trustee shall cease to be eligible under Section 7.08 and shall fail to resign after written request therefor by
the Company or by any such Certificateholder; or 
 (3) the Trustee shall become incapable of acting or shall be adjudged a
bankrupt or insolvent, or a receiver of the Trustee or of its property shall be appointed or any public officer shall take charge or control of the Trustee or of its property or affairs for the purpose of rehabilitation, conservation or liquidation;

  
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 then, in any case, (i) the Company may remove the Trustee or (ii) any Certificateholder of the
related series who has been a bona fide Certificateholder for at least six months may, on behalf of itself and all others similarly situated, petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a
successor Trustee of such Trust. 
 (e) If a Responsible Officer of the Trustee shall obtain actual knowledge of an Avoidable Tax
(as defined below) in respect of any Trust which has been or is likely to be asserted, the Trustee shall promptly notify the Company and shall, within 30 days of such notification, resign as Trustee of such Trust hereunder unless within such 30-day
period the Trustee shall have received notice that the Company has agreed to pay such tax. The Company shall promptly appoint a successor Trustee of such Trust in a jurisdiction where there are no Avoidable Taxes. As used herein, an
“Avoidable Tax” in respect of such Trust means a state or local tax: (i) upon (w) such Trust, (x) such Trust Property, (y) Certificateholders of such Trust or (z) the Trustee for which the Trustee is
entitled to seek reimbursement from the Trust Property of such Trust, and (ii) which would be avoided if the Trustee were located in another state, or jurisdiction within a state, within the United States of America. A tax shall not be an
Avoidable Tax in respect of any Trust if the Company or any Owner Trustee shall agree to pay, and shall pay, such tax. 
 (f) If the
Trustee shall resign, be removed or become incapable of acting as Trustee of any Trust or if a vacancy shall occur in the office of the Trustee of any Trust for any cause, the Company shall promptly appoint a successor Trustee of such Trust. If,
within one year after such resignation, removal or incapability, or other occurrence of such vacancy, a successor Trustee of such Trust shall be appointed by Direction of the Certificateholders of the related series holding Certificates of such
series evidencing Fractional Undivided Interests aggregating not less than a majority in interest in such Trust delivered to the Company, the related Owner Trustees, the related Loan Trustee and the retiring Trustee, then the successor Trustee of
such Trust so appointed shall, with the approval of the Company of such appointment, which approval shall not be unreasonably withheld, forthwith upon its acceptance of such appointment, become the successor Trustee of such Trust and supersede the
successor Trustee of such Trust appointed as provided above. If no successor Trustee shall have been so appointed as provided above and accepted appointment in the manner hereinafter provided, the resigning Trustee or any Certificateholder who has
been a bona fide Certificateholder of the related series for at least six months may, on behalf of himself and all others similarly situated, petition any court of competent jurisdiction for the appointment of a successor Trustee of such
Trust. 
 (g) The successor Trustee of a Trust shall give notice of the resignation and removal of the Trustee and appointment of the
successor Trustee by mailing written notice of such event by first-class mail, postage prepaid, to the Certificateholders of the related series as their names and addresses appear in the Register. Each notice shall include the name of such successor
Trustee and the address of its Corporate Trust Office. 
 Section 7.10. Acceptance of Appointment by Successor. Every successor
Trustee appointed hereunder shall execute and deliver to the Company and to the retiring Trustee with respect to any or all Trusts an instrument accepting such appointment, and thereupon the resignation or removal of the retiring Trustee with
respect to such Trusts shall become effective and such successor Trustee, without any further act, deed or conveyance, shall become vested with all the rights, powers, trusts and duties of the retiring Trustee; but, on request of the Company or the
successor Trustee, such retiring 

  
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Trustee shall execute and deliver an instrument transferring to such successor Trustee all such rights, powers and trusts of the retiring Trustee and shall duly assign, transfer and deliver to
such successor Trustee all Trust Property held by such retiring Trustee in respect of such Trusts hereunder, subject nevertheless to its lien, if any, provided for in Section 7.07. Upon request of any such successor Trustee, the Company, the
retiring Trustee and such successor Trustee shall execute and deliver any and all instruments containing such provisions as shall be necessary or desirable to transfer and confirm to, and for more fully and certainly vesting in, such successor
Trustee all such rights, powers and trusts. 
 If a successor Trustee is appointed with respect to one or more (but not all) Trusts, the
Company, the predecessor Trustee and each successor Trustee with respect to any Trust shall execute and deliver a supplemental agreement hereto which shall contain such provisions as shall be deemed necessary or desirable to confirm that all the
rights, powers, trusts and duties of the predecessor Trustee with respect to the Trusts as to which the predecessor Trustee is not retiring shall continue to be vested in the predecessor Trustee, and shall add to or change any of the provisions of
this Basic Agreement and the applicable Trust Supplements as shall be necessary to provide for or facilitate the administration of the Trusts hereunder by more than one Trustee, it being understood that nothing herein or in such supplemental
agreement shall constitute such Trustees as co-Trustees of the same Trust and that each such Trustee shall be Trustee of separate Trusts. 

No institution shall accept its appointment as a Trustee hereunder unless at the time of such acceptance such institution shall be qualified
and eligible under this Article VII. 
 Section 7.11. Merger, Conversion, Consolidation or Succession to Business. Any
corporation into which the Trustee may be merged or converted or with which it may be consolidated, or any corporation resulting from any merger, conversion or consolidation to which the Trustee shall be a party, or any corporation succeeding to all
or substantially all of the corporate trust business of the Trustee, shall be the successor of the Trustee hereunder; provided, however, that such corporation shall be otherwise qualified and eligible under this Article VII, without
the execution or filing of any paper or any further act on the part of any of the parties hereto. In case any Certificates shall have been executed or authenticated, but not delivered, by the Trustee then in office, any successor by merger,
conversion or consolidation to such authenticating Trustee may adopt such execution or authentication and deliver the Certificates so executed or authenticated with the same effect as if such successor Trustee had itself executed or authenticated
such Certificates. 
 Section 7.12. Maintenance of Agencies. (a) With respect to each series of Certificates, there shall
at all times be maintained an office or agency in the location set forth in Section 12.04 where Certificates of such series may be presented or surrendered for registration of transfer or for exchange, and for payment thereof, and where notices
and demands, to or upon the Trustee in respect of such Certificates or this Agreement may be served; provided, however, that, if it shall be necessary that the Trustee maintain an office or agency in another location with respect to
the Certificates of any series (e.g., the Certificates of such series shall be represented by Definitive Certificates and shall be listed on a national securities exchange), the Trustee will make all reasonable efforts to establish such an
office or agency. Written notice of the location of each such other office or agency and of any change of location thereof shall be given by the Trustee to the Company, any Owner Trustees, the Loan Trustees (in the case of any Owner Trustee or Loan
Trustee, at its address specified in the Note Documents or such other address as may be notified to the Trustee) and the Certificateholders of such series. In the event that no such office or agency shall be maintained or no such notice of location
or of change of location shall be given, presentations and demands may be made and notices may be served at the Corporate Trust Office of the Trustee. 

  
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 (b) There shall at all times be a Registrar and a Paying Agent hereunder with respect to the
Certificates of each series. Each such Authorized Agent shall be a bank or trust company, shall be a corporation organized and doing business under the laws of the United States or any state, with a combined capital and surplus of at least
$75,000,000, or a corporation having a combined capital and surplus in excess of $5,000,000, the obligations of which are guaranteed by a corporation organized and doing business under the laws of the United States or any state, with a combined
capital and surplus of at least $75,000,000, and shall be authorized under such laws to exercise corporate trust powers, subject to supervision by federal or state authorities. The Trustee shall initially be the Paying Agent and, as provided in
Section 3.04, Registrar hereunder with respect to the Certificates of each series. Each Registrar shall furnish to the Trustee, at stated intervals of not more than six months, and at such other times as the Trustee may request in writing, a
copy of the Register maintained by such Registrar. 
 (c) Any corporation into which any Authorized Agent may be merged or converted or
with which it may be consolidated, or any corporation resulting from any merger, consolidation or conversion to which any Authorized Agent shall be a party, or any corporation succeeding to the corporate trust business of any Authorized Agent, shall
be the successor of such Authorized Agent, if such successor corporation is otherwise eligible under this Section 7.12, without the execution or filing of any paper or any further act on the part of the parties hereto or such Authorized Agent
or such successor corporation. 
 (d) Any Authorized Agent may at any time resign by giving written notice of resignation to the Trustee,
the Company, any related Owner Trustees and the related Loan Trustees. The Company may, and at the request of the Trustee shall, at any time terminate the agency of any Authorized Agent by giving written notice of termination to such Authorized
Agent and to the Trustee. Upon the resignation or termination of an Authorized Agent or in case at any time any such Authorized Agent shall cease to be eligible under this Section 7.12 (when, in either case, no other Authorized Agent performing
the functions of such Authorized Agent shall have been appointed), the Company shall promptly appoint one or more qualified successor Authorized Agents, reasonably satisfactory to the Trustee, to perform the functions of the Authorized Agent which
has resigned or whose agency has been terminated or who shall have ceased to be eligible under this Section 7.12. The Company shall give written notice of any such appointment made by it to the Trustee, any related Owner Trustees and the
related Loan Trustees; and in each case the Trustee shall mail notice of such appointment to all Certificateholders of the related series as their names and addresses appear on the Register for such series. 

(e) The Company agrees to pay, or cause to be paid, from time to time to each Authorized Agent reasonable compensation for its services and
to reimburse it for its reasonable expenses. 
 Section 7.13. Money for Certificate Payments to Be Held in Trust. All moneys
deposited with any Paying Agent for the purpose of any payment on Certificates shall be deposited and held in trust for the benefit of the Certificateholders entitled to such payment, subject to the provisions of this Section 7.13. Moneys so
deposited and held in trust shall constitute a separate trust fund for the benefit of the Certificateholders with respect to which such money was deposited. 

The Trustee may at any time, for the purpose of obtaining the satisfaction and discharge of this Agreement or for any other purpose, direct
any Paying Agent to pay to the Trustee all sums held in trust by such Paying Agent, such sums to be held by the Trustee upon the same trusts as those upon which such sums were held by such Paying Agent; and, upon such payment by any Paying Agent to
the Trustee, such Paying Agent shall be released from all further liability with respect to such money. 

  
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 Section 7.14. Registration of Equipment Notes in Trustee’s Name. Subject to the
provisions of any Intercreditor Agreement, the Trustee agrees that all Equipment Notes to be purchased by any Trust and Permitted Investments, if any, shall be issued in the name of the Trustee as trustee for the applicable Trust or its nominee and
held by the Trustee in trust for the benefit of the Certificateholders of such series, or, if not so held, the Trustee or its nominee shall be reflected as the owner of such Equipment Notes or Permitted Investments, as the case may be, in the
register of the issuer of such Equipment Notes or Permitted Investments, as the case may be. 
 Section 7.15. Representations and
Warranties of Trustee. The Trustee hereby represents and warrants that: 
 (a) the Trustee is a national banking association organized
and validly existing in good standing under the laws of the United States of America; 
 (b) the Trustee has full power, authority and
legal right to execute, deliver and perform this Agreement, any Intercreditor Agreement and the Note Purchase Agreements and has taken all necessary action to authorize the execution, delivery and performance by it of this Agreement, any
Intercreditor Agreement and the Note Purchase Agreements; 
 (c) the execution, delivery and performance by the Trustee of this Agreement,
any Intercreditor Agreement and the Note Purchase Agreements (i) will not violate any provision of any United States federal law governing its trust powers or the law of the state of the United States where it is located governing the banking
and trust powers of the Trustee or any order, writ, judgment, or decree of any court, arbitrator or governmental authority applicable to the Trustee or any of its assets, (ii) will not violate any provision of the articles of association or
by-laws of the Trustee, and (iii) will not violate any provision of, or constitute, with or without notice or lapse of time, a default under, or result in the creation or imposition of any lien on any properties included in the Trust Property
pursuant to the provisions of any mortgage, indenture, contract, agreement or other undertaking to which it is a party, which violation, default or lien could reasonably be expected to have an adverse effect on the Trustee’s performance or
ability to perform its duties hereunder or thereunder or on the transactions contemplated herein or therein; 
 (d) the execution, delivery
and performance by the Trustee of this Agreement, any Intercreditor Agreement and the Note Purchase Agreements will not require the authorization, consent, or approval of, the giving of notice to, the filing or registration with, or the taking of
any other action in respect of, any governmental authority or agency of the United States or the state of the United States where it is located regulating the banking and corporate trust activities of the Trustee; and 

(e) this Agreement, any Intercreditor Agreement and the Note Purchase Agreements have been duly executed and delivered by the Trustee and
constitute the legal, valid and binding agreements of the Trustee, enforceable against it in accordance with their respective terms; provided, however, that enforceability may be limited by (i) applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting the rights of creditors generally and (ii) general principles of equity. 

  
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 Section 7.16. Withholding Taxes; Information Reporting. As to the Certificates of any
series, the Trustee, as trustee of the related grantor trust created by this Agreement, shall exclude and withhold from each distribution of principal, premium, if any, and interest and other amounts due under this Agreement or under the
Certificates of such series any and all withholding taxes applicable thereto as required by law. The Trustee agrees to act as such withholding agent and, in connection therewith, whenever any present or future taxes or similar charges are required
to be withheld with respect to any amounts payable in respect of the Certificates of such series, to withhold such amounts and timely pay the same to the appropriate authority in the name of and on behalf of the Certificateholders of such series,
that it will file any necessary withholding tax returns or statements when due, and that, as promptly as possible after the payment thereof, it will deliver to each such Certificateholder of such series appropriate documentation showing the payment
thereof, together with such additional documentary evidence as such Certificateholders may reasonably request from time to time. The Trustee agrees to file any other information reports as it may be required to file under United States law. 

Section 7.17. Trustee’s Liens. The Trustee in its individual capacity agrees that it will, in respect of each Trust created
by this Agreement, at its own cost and expense promptly take any action as may be necessary to duly discharge and satisfy in full any mortgage, pledge, lien, charge, encumbrance, security interest or claim (“Trustee’s Liens”)
on or with respect to the Trust Property of such Trust which is attributable to the Trustee either (i) in its individual capacity and which is unrelated to the transactions contemplated by this Agreement or the related Note Documents or
(ii) as Trustee hereunder or in its individual capacity and which arises out of acts or omissions which are not contemplated by this Agreement. 

Section 7.18. Preferential Collection of Claims. The Trustee shall comply with Section 311(a) of the Trust Indenture Act,
excluding any creditor relationship listed in Section 311(b) of the Trust Indenture Act. If the Trustee shall resign or be removed as Trustee, it shall be subject to Section 311(a) of the Trust Indenture Act to the extent provided therein.

 ARTICLE VIII 

CERTIFICATEHOLDERS’ LISTS AND REPORTS BY TRUSTEE 

Section 8.01. The Company to Furnish Trustee with Names and Addresses of Certificateholders. The Company will furnish to the
Trustee within 15 days after each Record Date with respect to a Scheduled Payment, and at such other times as the Trustee may request in writing within 30 days after receipt by the Company of any such request, a list, in such form as the Trustee may
reasonably require, of all information in the possession or control of the Company as to the names and addresses of the Certificateholders of each series, in each case as of a date not more than 15 days prior to the time such list is furnished;
provided, however, that so long as the Trustee is the sole Registrar for such series, no such list need be furnished; and provided further, however, that no such list need be furnished for so long as a copy of the
Register is being furnished to the Trustee pursuant to Section 7.12. 
 Section 8.02. Preservation of Information;
Communications to Certificateholders. The Trustee shall preserve, in as current a form as is reasonably practicable, the names and addresses of Certificateholders of each series contained in the most recent list furnished to the Trustee as
provided in Section 7.12 or Section 8.01, as the case may be, and the names and addresses of Certificateholders of each series received by the Trustee in its capacity as Registrar, if so acting. The Trustee may destroy any list furnished
to it as provided in Section 7.12 or Section 8.01, as the case may be, upon receipt of a new list so furnished. 

  
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 Section 8.03. Reports by Trustee. Within 60 days after May 15 of each year
commencing with the first full year following the issuance of any series of Certificates, the Trustee shall transmit to the Certificateholders of such series, as provided in Section 313(c) of the Trust Indenture Act, a brief report dated as of
such May 15, if required by Section 313(a) of the Trust Indenture Act. 
 Section 8.04. Reports by the Company. The
Company shall: 
 (a) file with the Trustee, within 30 days after the Company files the same with the SEC, copies of the annual reports and
of the information, documents and other reports (or copies of such portions of any of the foregoing as the SEC may from time to time by rules and regulations prescribe) which the Company is required to file with the SEC pursuant to Section 13
or Section 15(d) of the Securities Exchange Act of 1934, as amended; or, if the Company is not required to file information, documents or reports pursuant to either of such sections, then to file with the Trustee and the SEC, in accordance with
rules and regulations prescribed by the SEC, such information, documents and reports which may be required pursuant to the applicable Trust Supplement; 

(b) file with the Trustee and the SEC, in accordance with the rules and regulations prescribed by the SEC, such additional information,
documents and reports with respect to compliance by the Company with the conditions and covenants of the Company provided for in this Agreement, as may be required by such rules and regulations, including, in the case of annual reports, if required
by such rules and regulations, certificates or opinions of independent public accountants, conforming to the requirements of Section 1.02; 

(c) transmit to all Certificateholders, in the manner and to the extent provided in Section 313(c) of the Trust Indenture Act such
summaries of any information, documents and reports required to be filed by the Company pursuant to subsections (a) and (b) of this Section 8.04 as may be required by rules and regulations prescribed by the SEC; and 

(d) furnish to the Trustee, not less often than annually, a brief certificate from the principal executive officer, principal financial
officer or principal accounting officer as to his knowledge of the Company’s compliance with all conditions and covenants under this Agreement (it being understood that for purposes of this paragraph (d), such compliance shall be determined
without regard to any period of grace or requirement of notice provided under this Agreement). 
 ARTICLE IX 

SUPPLEMENTAL AGREEMENTS 

Section 9.01. Supplemental Agreements Without Consent of Certificateholders. Without the consent of the Certificateholders, the
Company may (but will not be required to), and the Trustee (subject to Section 9.03) shall, at the Company’s request, at any time and from time to time, enter into one or more agreements supplemental hereto or, if applicable, to an
Intercreditor Agreement, a Note Purchase Agreement or a Liquidity Facility, in form satisfactory to the Trustee, for any of the following purposes: 

(1) to provide for the formation of a Trust, the issuance of a series of Certificates and other matters contemplated by
Section 2.01(b); or 

  
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 (2) to evidence the succession of another Person to the Company and the
assumption by any such successor of the covenants of the Company herein contained or of the Company’s obligations under any Intercreditor Agreement or any Liquidity Facility; or 

(3) to add to the covenants of the Company for the benefit of the Certificateholders of any series, or to surrender any right
or power conferred upon the Company in this Agreement, any Intercreditor Agreement or any Liquidity Facility; or 
 (4) to
correct or supplement any provision in this Agreement, any Intercreditor Agreement or any Liquidity Facility which may be defective or inconsistent with any other provision herein or therein or to cure any ambiguity or to modify any other provision
with respect to matters or questions arising under this Agreement, any Intercreditor Agreement or any Liquidity Facility, provided, however, that any such action shall not materially adversely affect the interests of the
Certificateholders of any series; to correct any mistake in this Agreement, any Intercreditor Agreement or any Liquidity Facility; or, as provided in any Intercreditor Agreement, to give effect to or provide for a Replacement Liquidity Facility (as
defined in such Intercreditor Agreement); or 
 (5) to comply with any requirement of the SEC, any applicable law, rules or
regulations of any exchange or quotation system on which the Certificates of any series are listed or of any regulatory body; or 

(6) to modify, eliminate or add to the provisions of this Agreement, any Intercreditor Agreement or any Liquidity Facility to
such extent as shall be necessary to continue the qualification of this Agreement, any Intercreditor Agreement or any Liquidity Facility (including any supplemental agreement) under the Trust Indenture Act or under any similar Federal statute
hereafter enacted, and to add to this Agreement, any Intercreditor Agreement or any Liquidity Facility such other provisions as may be expressly permitted by the Trust Indenture Act, excluding, however, the provisions referred to in
Section 316(a)(2) of the Trust Indenture Act as in effect at the date as of which this Basic Agreement was executed or any corresponding provision in any similar Federal statute hereafter enacted; or 

(7) to evidence and provide for the acceptance of appointment under this Agreement, any Intercreditor Agreement or any
Liquidity Facility by a successor Trustee with respect to one or more Trusts and to add to or change any of the provisions of this Agreement, any Intercreditor Agreement or any Liquidity Facility as shall be necessary to provide for or facilitate
the administration of the Trust, pursuant to the requirements of Section 7.10; or 
 (8) to provide the information
required under Section 7.12 and Section 12.04 as to the Trustee; or 
 (9) to make any other amendments or
modifications hereto, provided, however, that such amendments or modifications shall apply to Certificates of any series to be thereafter issued; 

provided, however, that no such supplemental agreement shall adversely affect the status of any Trust as a grantor trust under Subpart E,
Part I of Subchapter J of Chapter 1 of Subtitle A of the Internal Revenue Code of 1986, as amended, for U.S. federal income tax purposes. 

  
 38 

 Section 9.02. Supplemental Agreements with Consent of Certificateholders. With
respect to each separate Trust and the series of Certificates relating thereto, with the consent of the Certificateholders holding Certificates of such series (including consents obtained in connection with a tender offer or exchange offer for the
Certificates) evidencing Fractional Undivided Interests aggregating not less than a majority in interest in such Trust, by Direction of said Certificateholders delivered to the Company and the Trustee, the Company may (with the consent of the Owner
Trustees, if any, relating to such Certificates, which consent shall not be unreasonably withheld), but shall not be obligated to, and the Trustee (subject to Section 9.03) shall, enter into an agreement or agreements supplemental hereto for
the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of this Agreement, any Intercreditor Agreement or any Liquidity Facility to the extent applicable to such Certificateholders or of modifying in
any manner the rights and obligations of such Certificateholders under this Agreement, any Intercreditor Agreement or any Liquidity Facility; provided, however, that no such agreement shall, without the consent of the Certificateholder
of each Outstanding Certificate affected thereby: 
 (1) reduce in any manner the amount of, or delay the timing of, any
receipt by the Trustee of payments on the Equipment Notes held in such Trust or distributions that are required to be made herein on any Certificate of such series, or change any date of payment on any Certificate of such series, or change the place
of payment where, or the coin or currency in which, any Certificate of such series is payable, or impair the right to institute suit for the enforcement of any such payment or distribution on or after the Regular Distribution Date or Special
Distribution Date applicable thereto; or 
 (2) permit the disposition of any Equipment Note included in the Trust Property
of such Trust except as permitted by this Agreement, or otherwise deprive such Certificateholder of the benefit of the ownership of the Equipment Notes in such Trust; or 

(3) alter the priority of distributions specified in the Intercreditor Agreement in a manner materially adverse to the
interests of the Certificateholders of any series; or 
 (4) reduce the specified percentage of the aggregate Fractional
Undivided Interests of such Trust that is required for any such supplemental agreement, or reduce such specified percentage required for any waiver (of compliance with certain provisions of this Agreement or certain defaults hereunder and their
consequences) provided for in this Agreement; or 
 (5) modify any of the provisions of this Section 9.02 or
Section 6.05, except to increase any such percentage or to provide that certain other provisions of this Agreement cannot be modified or waived without the consent of the Certificateholder of each Certificate of such series affected thereby; or

 (6) adversely affect the status of any Trust as a grantor trust under Subpart E, Part I of Subchapter J of Chapter 1
of Subtitle A of the Internal Revenue Code of 1986, as amended, for U.S. federal income tax purposes. 
 It shall not be necessary for any
Direction of such Certificateholders under this Section 9.02 to approve the particular form of any proposed supplemental agreement, but it shall be sufficient if such Direction shall approve the substance thereof. 

  
 39 

 Section 9.03. Documents Affecting Immunity or Indemnity. If in the opinion of the
Trustee any document required to be executed by it pursuant to the terms of Section 9.01 or 9.02 affects any interest, right, duty, immunity or indemnity in favor of the Trustee under this Basic Agreement or any Trust Supplement, the Trustee
may in its discretion decline to execute such document. 
 Section 9.04. Execution of Supplemental Agreements. In executing, or
accepting the additional trusts created by, any supplemental agreement permitted by this Article or the modifications thereby of the trusts created by this Agreement, the Trustee shall be entitled to receive, and shall be fully protected in relying
upon, an Opinion of Counsel stating that the execution of such supplemental agreement is authorized or permitted by this Agreement. 

Section 9.05. Effect of Supplemental Agreements. Upon the execution of any agreement supplemental to this Agreement under this
Article, this Basic Agreement shall be modified in accordance therewith, and such supplemental agreement shall form a part of this Basic Agreement for all purposes; and every Certificateholder of each series theretofore or thereafter authenticated
and delivered hereunder shall be bound thereby to the extent applicable to such series. 
 Section 9.06. Conformity with Trust
Indenture Act. Every supplemental agreement executed pursuant to this Article shall conform to the requirements of the Trust Indenture Act as then in effect. 

Section 9.07. Reference in Certificates to Supplemental Agreements. Certificates of each series authenticated and delivered after
the execution of any supplemental agreement applicable to such series pursuant to this Article may bear a notation in form approved by the Trustee as to any matter provided for in such supplemental agreement; and, in such case, suitable notation may
be made upon Outstanding Certificates of such series after proper presentation and demand. 
 ARTICLE X 

AMENDMENTS TO INDENTURE AND NOTE DOCUMENTS 

Section 10.01. Amendments and Supplements to Indenture and Other Note Documents. In the event that the Trustee, as holder (or
beneficial owner through the Subordination Agent) of any Equipment Notes (or as a prospective purchaser of any Postponed Notes) in trust for the benefit of the Certificateholders of any series or as Controlling Party under an Intercreditor
Agreement, receives (directly or indirectly through the Subordination Agent) a request for a consent to any amendment, modification, waiver or supplement under any Indenture, other Note Document or any other related document, subject to
Section 9.01 hereof, the Trustee shall forthwith send a notice of such proposed amendment, modification, waiver or supplement to each Certificateholder of such series registered on the Register as of the date of such notice. The Trustee shall
request from the Certificateholders of such series a Direction as to (a) whether or not to take or refrain from taking (or direct the Subordination Agent to take or refrain from taking) any action which a holder of (or, with respect to
Postponed Notes, a prospective purchaser of) such Equipment Note or a Controlling Party has the option to direct, (b) whether or not to give or execute (or direct the Subordination Agent to give or execute) any waivers, consents, amendments,
modifications or supplements as a holder of (or, with respect to Postponed Notes, a prospective purchaser of) such Equipment Note or as Controlling Party and (c) how to vote (or direct the Subordination Agent to vote) any Equipment Note (or,
with respect to a Postponed Note, its commitment to acquire such Postponed Note) if a vote has been called for with respect thereto. Provided such a request for Certificateholder Direction shall have been made, in directing any action or casting any
vote or giving any consent as the holder of any Equipment Note (or in directing the 

  
 40 

 
Subordination Agent in any of the foregoing), (i) other than as Controlling Party, the Trustee shall vote for or give consent to any such action with respect to such Equipment Note (or
Postponed Note) in the same proportion as that of (A) the aggregate face amounts of all Certificates actually voted in favor of or for giving consent to such action by such Direction of Certificateholders to (B) the aggregate face amount
of all Outstanding Certificates and (ii) as Controlling Party, the Trustee shall vote as directed in such Certificateholder Direction by the Certificateholders of such series evidencing a Fractional Undivided Interest aggregating not less than
a majority in interest in the Trust. For purposes of the immediately preceding sentence, a Certificate shall have been “actually voted” if the Holder of such Certificate has delivered to the Trustee an instrument evidencing such
Holder’s consent to such Direction prior to one Business Day before the Trustee directs such action or casts such vote or gives such consent. Notwithstanding the foregoing, but subject to Section 6.04 and any Intercreditor Agreement, the
Trustee may, with respect to the Certificates of any series, in its own discretion and at its own direction, consent and notify the relevant Loan Trustee of such consent (or direct the Subordination Agent to consent and notify the Loan Trustee of
such consent) to any amendment, modification, waiver or supplement under any related Indenture or any other related Note Document if an Event of Default hereunder shall have occurred and be continuing or if such amendment, modification, waiver or
supplement will not materially adversely affect the interests of the Certificateholders of such series. 
 ARTICLE XI 

TERMINATION OF TRUSTS 

Section 11.01. Termination of the Trusts. In respect of each Trust created by this Basic Agreement as supplemented by a related
Trust Supplement, the respective obligations and responsibilities of the Company and the Trustee with respect to such Trust shall terminate upon the distribution to all Holders of Certificates of the series of such Trust and the Trustee of all
amounts required to be distributed to them pursuant to this Agreement and the disposition of all property held as part of the Trust Property of such Trust; provided, however, that in no event shall such Trust continue beyond the final
expiration date determined as provided in such Trust Supplement. 
 Notice of any termination of a Trust, specifying the applicable Regular
Distribution Date (or applicable Special Distribution Date, as the case may be) upon which the Certificateholders of any series may surrender their Certificates to the Trustee for payment of the final distribution and cancellation, shall be mailed
promptly by the Trustee to Certificateholders of such series not earlier than the minimum number of days and not later than the maximum number of days specified therefor in the related Trust Supplement preceding such final distribution specifying
(A) the Regular Distribution Date (or Special Distribution Date, as the case may be) upon which the proposed final payment of the Certificates of such series will be made upon presentation and surrender of Certificates of such series at the
office or agency of the Trustee therein specified, (B) the amount of any such proposed final payment, and (C) that the Record Date otherwise applicable to such Regular Distribution Date (or Special Distribution Date, as the case may be) is
not applicable, payments being made only upon presentation and surrender of the Certificates of such series at the office or agency of the Trustee therein specified. The Trustee shall give such notice to the Registrar at the time such notice is
given to Certificateholders of such series. Upon presentation and surrender of the Certificates of such series in accordance with such notice, the Trustee shall cause to be distributed to Certificateholders of such series amounts distributable on
such Regular Distribution Date (or Special Distribution Date, as the case may be) pursuant to Section 4.02. 
 In the event that all of
the Certificateholders of such series shall not surrender their Certificates for cancellation within six months after the date specified in the above-mentioned written 

  
 41 

 
notice, the Trustee shall give a second written notice to the remaining Certificateholders of such series to surrender their Certificates for cancellation and receive the final distribution with
respect thereto. No additional interest shall accrue on the Certificates of such series after any Regular Distribution Date (or Special Distribution Date, as the case may be) of such series, as specified in the first written notice. In the event
that any money held by the Trustee for the payment of distributions on the Certificates of such series shall remain unclaimed for two years (or such lesser time as the Trustee shall be satisfied, after 60 days’ notice from the Company, is one
month prior to the escheat period provided under applicable law) after the final distribution date with respect thereto, the Trustee shall pay to each Loan Trustee the appropriate amount of money relating to such Loan Trustee and shall give written
notice thereof to the related Owner Trustees and the Company. 
 ARTICLE XII 

MISCELLANEOUS PROVISIONS 

Section 12.01. Limitation on Rights of Certificateholders. The death or incapacity of any Certificateholder of any series shall
not operate to terminate this Agreement or the related Trust, nor entitle such Certificateholder’s legal representatives or heirs to claim an accounting or to take any action or commence any proceeding in any court for a partition or winding up
of the Trust, nor otherwise affect the rights, obligations, and liabilities of the parties hereto or any of them. 
 Section 12.02.
Liabilities of Certificateholders. Neither the existence of the Trust nor any provision in this Agreement is intended to or shall limit the liability the Certificateholders would otherwise incur if the Certificateholders owned Trust Property
as co-owners, or incurred any obligations of the Trust, directly rather than through the Trust. 
 Section 12.03. Registration of
Equipment Notes in Name of Subordination Agent. If a Trust is party to an Intercreditor Agreement, the Trustee agrees that all Equipment Notes to be purchased by such Trust shall be issued in the name of the Subordination Agent under such
Intercreditor Agreement or its nominee and held by such Subordination Agent in trust for the benefit of the Certificateholders, or, if not so held, such Subordination Agent or its nominee shall be reflected as the owner of such Equipment Notes in
the register of the issuer of such Equipment Notes. 
 Section 12.04. Notices. (a) Unless otherwise specifically provided
herein or in the applicable Trust Supplement with respect to any Trust, all notices required under the terms and provisions of this Basic Agreement or such Trust Supplement with respect to such Trust shall be in English and in writing, and any such
notice may be given by United States mail, courier service or telecopy, and any such notice shall be effective when delivered or received or, if mailed, three days after deposit in the United States mail with proper postage for ordinary mail
prepaid, 
 if to the Company: 

Spirit Airlines, Inc. 
 2800
Executive Way 
 Miramar, Florida 33025 

Attention: Treasurer 

Facsimile: (954) 447-7854 

if to the Trustee: 
 Wilmington
Trust, National Association 
 1100 North Market Street 

Wilmington, DE 19890-1605 

Attention: Corporate Trust Administration 

Facsimile: (302) 636-4140 

Telephone: (302) 636-6294 

  
 42 

 (b) The Company or the Trustee, by notice to the other, may designate additional or different
addresses for subsequent notices or communications. 
 (c) Any notice or communication to Certificateholders of any series shall be mailed
by first-class mail to the addresses for Certificateholders of such series shown on the Register kept by the Registrar and to addresses filed with the Trustee for Certificate Owners of such series. Failure so to mail a notice or communication or any
defect in such notice or communication shall not affect its sufficiency with respect to other Certificateholders or Certificate Owners of such series. 

(d) If a notice or communication is mailed in the manner provided above within the time prescribed, it is conclusively presumed to have been
duly given, whether or not the addressee receives it. 
 (e) If the Company mails a notice or communication to the Certificateholders of
such series, it shall mail a copy to the Trustee and to each Paying Agent for such series at the same time. 
 (f) Notwithstanding the
foregoing, all communications or notices to the Trustee shall be deemed to be given only when received by a Responsible Officer of the Trustee. 

(g) The Trustee shall promptly furnish the Company with a copy of any demand, notice or written communication received by the Trustee
hereunder from any Certificateholder, Owner Trustee or Loan Trustee. 
 Section 12.05. Governing Law. THIS BASIC AGREEMENT HAS
BEEN DELIVERED IN THE STATE OF NEW YORK AND, TOGETHER WITH ALL TRUST SUPPLEMENTS AND CERTIFICATES, SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE PARTIES HEREUNDER SHALL BE
DETERMINED IN ACCORDANCE WITH SUCH LAWS. 
 Section 12.06. Severability of Provisions. If any one or more of the covenants,
agreements, provisions or terms of this Agreement shall be for any reason whatsoever held invalid, then such covenants, agreements, provisions, or terms shall be deemed severable from the remaining covenants, agreements, provisions or terms of this
Agreement and shall in no way affect the validity or enforceability of the other provisions of this Agreement or the related Trust, or of the Certificates of such series or the rights of the Certificateholders thereof. 

Section 12.07. Trust Indenture Act Controls. This Agreement is subject to the provisions of the Trust Indenture Act and shall, to
the extent applicable, be governed by such provisions. If any provision of this Agreement limits, qualifies or conflicts with another provision which is required to be included in this Agreement by the Trust Indenture Act, the required provision
shall control. 

  
 43 

 Section 12.08. Effect of Headings and Table of Contents. The Article and Section
headings herein and the Table of Contents are for convenience only and shall not affect the construction hereof. 
 Section 12.09.
Successors and Assigns. All covenants, agreements, representations and warranties in this Agreement by the Trustee and the Company shall bind and, to the extent permitted hereby, shall inure to the benefit of and be enforceable by their
respective successors and assigns, whether so expressed or not. 
 Section 12.10. Benefits of Agreement. Nothing in this
Agreement or in the Certificates of any series, express or implied, shall give to any Person, other than the parties hereto and their successors hereunder, and the Certificateholders of each series, any benefit or any legal or equitable right,
remedy or claim under this Agreement. 
 Section 12.11. Legal Holidays. In any case where any Regular Distribution Date or
Special Distribution Date relating to any Certificate of any series shall not be a Business Day with respect to such series, then (notwithstanding any other provision of this Agreement) payment need not be made on such date, but may be made on the
next succeeding Business Day with the same force and effect as if made on such Regular Distribution Date or Special Distribution Date, and no interest shall accrue during the intervening period. 

Section 12.12. Counterparts. For the purpose of facilitating the execution of this Agreement and for other purposes, this
Agreement may be executed simultaneously in any number of counterparts, each of which counterparts shall be deemed to be an original, and all of which counterparts shall constitute but one and the same instrument. 

Section 12.13. Communication by Certificateholders with Other Certificateholders. Certificateholders of any series may communicate
with other Certificateholders of such series with respect to their rights under this Basic Agreement, the related Trust Supplement or the Certificates of such series pursuant to Section 312(b) of the Trust Indenture Act. The Company, the
Trustee and any and all other persons benefitted by this Agreement shall have the protection afforded by Section 312(c) of the Trust Indenture Act. 

Section 12.14. Intention of Parties. The parties hereto intend that each Trust be classified for U.S. federal income tax purposes
as a grantor trust under Subpart E, Part I of Subchapter J of the Internal Revenue Code of 1986, as amended, and not as a trust or association taxable as a corporation or as a partnership. The powers granted and obligations undertaken pursuant to
this Agreement shall be so construed so as to further such intent. 

  
 44 

 IN WITNESS WHEREOF, the parties have caused this Agreement to be duly executed by their
respective officers thereunto duly authorized as of the day and year first written above. 
  

			
	SPIRIT AIRLINES, INC.
		
	By:	 	 /s/ Edward Christie

		 	Name: Edward Christie
		 	 Title: Senior Vice President and

          Chief Financial Officer

	
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee
		
	By:	 	 /s/ Scott Wetzel

		 	Name: Scott Wetzel
		 	Title: Financial Services Officer

  
 45 

 EXHIBIT A 

FORM OF CERTIFICATE 
 Certificate No.
     
 Unless this certificate is presented by an authorized representative of The Depository Trust Company, a
New York corporation (“DTC”), to Issuer or its agent for registration of transfer, exchange or payment, and any certificate issued is registered in the name of Cede & Co. or in such other name as is requested by an
authorized representative of DTC (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS
WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest herein.1 

SPIRIT AIRLINES              PASS THROUGH TRUST 

Pass Through 
 Certificate, Series

 Final Regular Distribution Date:
[                    ], 
 evidencing a
fractional undivided interest in a trust, the property of which includes certain equipment notes each secured by Aircraft owned by or leased to Spirit Airlines, Inc. 

$         Fractional Undivided Interest representing .    % of the Trust per $1,000
face amount 
 THIS CERTIFIES THAT
                    , for value received, is the registered owner of a $         (
         dollars) Fractional Undivided Interest in the Spirit Airlines Pass Through Trust, Series [    ] (the “Trust”) created by Wilmington Trust, National Association, as
trustee (the “Trustee”), pursuant to a Pass Through Trust Agreement dated as of [    ] (the “Basic Agreement”), as supplemented by Trust Supplement No. [    ] thereto dated
[    ] (collectively, the “Agreement”), between the Trustee and Spirit Airlines, Inc., a corporation incorporated under Delaware law (the “Company”), a summary of certain of the pertinent
provisions of which is set forth below. To the extent not otherwise defined herein, the capitalized terms used herein have the meanings assigned to them in the Agreement. This Certificate is one of the duly authorized Certificates designated as
“    % Spirit Airlines Pass Through Certificate, Series                     ” (herein called the
“Certificates”). This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement. By virtue of its acceptance hereof, the Certificateholder of this Certificate assents to and agrees to be
bound by the provisions of the Agreement and any related Intercreditor Agreement. The property of the Trust includes certain Equipment Notes and all rights of the Trust to receive any payments under any related Intercreditor Agreement or Liquidity
Facility (the “Trust Property”). Each issue of the Equipment Notes is or will be secured by, among other things, a security interest in aircraft leased to or owned by the Company. 

The Certificates represent fractional undivided interests in the Trust and the Trust Property, and have no rights, benefits or interest in
respect of any other separate trust established pursuant to the terms of the Basic Agreement for any other series of certificates issued pursuant thereto. 
  

 

	1 	This legend to appear on Book-Entry Certificates to be deposited with The Depository Trust Company. 

  
 1 

 Subject to and in accordance with the terms of the Agreement and any related Intercreditor
Agreement, from funds then available to the Trustee, there will be distributed on each [    ] and [    ] (a “Regular Distribution Date”), commencing on [    ], to the
Person in whose name this Certificate is registered at the close of business on the 15th day preceding the Regular Distribution Date, an amount in respect of the Scheduled Payments on the Equipment Notes due on such Regular Distribution Date, the
receipt of which has been confirmed by the Trustee, equal to the product of the percentage interest in the Trust evidenced by this Certificate and an amount equal to the sum of such Scheduled Payments. Subject to and in accordance with the terms of
the Agreement and any related Intercreditor Agreement, in the event that Special Payments on the Equipment Notes are received by the Trustee, from funds then available to the Trustee, there shall be distributed on the applicable Special Distribution
Date, to the Person in whose name this Certificate is registered at the close of business on the 15th day preceding the Special Distribution Date, an amount in respect of such Special Payments on the Equipment Notes, the receipt of which has been
confirmed by the Trustee, equal to the product of the percentage interest in the Trust evidenced by this Certificate and an amount equal to the sum of such Special Payments so received. If a Regular Distribution Date or Special Distribution Date is
not a Business Day, distribution shall be made on the immediately following Business Day with the same force and effect as if made on such Regular Distribution Date or Special Distribution Date and no interest shall accrue during the intervening
period. The Trustee shall mail notice of each Special Payment and the Special Distribution Date therefor to the Certificateholder of this Certificate. 

Distributions on this Certificate will be made by the Trustee by check mailed to the Person entitled thereto, without the presentation or
surrender of this Certificate or the making of any notation hereon, except with respect to Certificates registered on the Record Date in the name of Clearing Agency (or its nominee), in which case, such distribution shall be made by wire transfer.
Except as otherwise provided in the Agreement and notwithstanding the above, the final distribution on this Certificate will be made after notice mailed by the Trustee of the pendency of such distribution and only upon presentation and surrender of
this Certificate at the office or agency of the Trustee specified in such notice. 
 The Certificates do not represent a direct obligation
of, or an obligation guaranteed by, or an interest in, the Company or the Trustee or any affiliate thereof. The Certificates are limited in right of payment, all as more specifically set forth on the face hereof and in the Agreement. All payments or
distributions made to Certificateholders under the Agreement shall be made only from the Trust Property and only to the extent that the Trustee shall have sufficient income or proceeds from the Trust Property to make such payments in accordance with
the terms of the Agreement. Each Certificateholder of this Certificate, by its acceptance hereof, agrees that it will look solely to the income and proceeds from the Trust Property to the extent available for distribution to such Certificateholder
as provided in the Agreement. This Certificate does not purport to summarize the Agreement and reference is made to the Agreement for information with respect to the interests, rights, benefits, obligations, proceeds, and duties evidenced hereby. A
copy of the Agreement may be examined during normal business hours at the principal office of the Trustee, and at such other places, if any, designated by the Trustee, by any Certificateholder upon request. 

The Agreement permits, with certain exceptions therein provided, the amendment thereof and the modification of the rights and obligations of
the Company and the rights of the Certificateholders under the Agreement at any time by the Company and the Trustee with the consent of the Certificateholders holding Certificates evidencing Fractional Undivided Interests aggregating not less than a
majority in interest in the Trust. Any such consent by the Certificateholder of this Certificate shall be conclusive and binding on such Certificateholder and upon all future Certificateholders of this

  
 2 

 
Certificate and of any Certificate issued upon the transfer hereof or in exchange hereof or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement
also permits the amendment thereof, in certain limited circumstances, without the consent of the Certificateholders of any of the Certificates. 

As provided in the Agreement and subject to certain limitations set forth therein, the transfer of this Certificate is registrable in the
Register upon surrender of this Certificate for registration of transfer at the offices or agencies maintained by the Trustee in its capacity as Registrar, or by any successor Registrar duly endorsed or accompanied by a written instrument of
transfer in form satisfactory to the Trustee and the Registrar, duly executed by the Certificateholder hereof or such Certificateholder’s attorney duly authorized in writing, and thereupon one or more new Certificates of authorized
denominations evidencing the same aggregate Fractional Undivided Interest in the Trust will be issued to the designated transferee or transferees. 

The Certificates are issuable only as registered Certificates without coupons in minimum denominations of $1,000 Fractional Undivided Interest
and integral multiples thereof except that one Certificate may be issued in a different denomination. As provided in the Agreement and subject to certain limitations therein set forth, the Certificates are exchangeable for new Certificates of
authorized denominations evidencing the same aggregate Fractional Undivided Interest in the Trust, as requested by the Certificateholder surrendering the same. 

No service charge will be made for any such registration of transfer or exchange, but the Trustee shall require payment of a sum sufficient to
cover any tax or governmental charge payable in connection therewith. 
 The Trustee, the Registrar, and any agent of the Trustee or the
Registrar may treat the person in whose name this Certificate is registered as the owner hereof for all purposes, and neither the Trustee, the Registrar, nor any such agent shall be affected by any notice to the contrary. 

The obligations and responsibilities created by the Agreement and the Trust created thereby shall terminate upon the distribution to
Certificateholders of all amounts required to be distributed to them pursuant to the Agreement and the disposition of all property held as part of the Trust Property. 

THIS CERTIFICATE AND THE AGREEMENT HAVE EACH BEEN DELIVERED IN THE STATE OF NEW YORK AND SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE
STATE OF NEW YORK AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE PARTIES AND CERTIFICATEHOLDERS HEREUNDER AND THEREUNDER SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS. 

Unless the certificate of authentication hereon has been executed by the Trustee, by manual signature, this Certificate shall not be entitled
to any benefit under the Agreement or be valid for any purpose. 

  
 3 

 IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly executed. 

 

									
		 		 		 	SPIRIT AIRLINES PASS THROUGH TRUST
				
		 		 		 	By: WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee
					
		 		 		 	By:	 	  

		 		 		 	Title:	 	  

					
	Dated:	 	  
	 		 		 	

  
 4 

 [FORM OF THE TRUSTEE’S CERTIFICATE OF AUTHENTICATION] 

This is one of the Certificates referred to 

in the within-mentioned Agreement. 
  

			
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee
		
	By:	 	  

		 	Authorized Officer

  
 5Trust Supplement No. 2015-1A

 Exhibit 4.2 

EXECUTION VERSION 
 TRUST
SUPPLEMENT NO. 2015-1A 
 Dated as of August 11, 2015 

between 
 SPIRIT AIRLINES, INC.

 and 
 WILMINGTON
TRUST, NATIONAL ASSOCIATION, 
 as Trustee, 

To 
 PASS THROUGH TRUST
AGREEMENT 
 Dated as of August 11, 2015 

Spirit Airlines Pass Through Trust 2015-1A 

Spirit Airlines Pass Through Certificates, 

Series 2015-1A 

  
 Trust Supplement No.
2015-1A 
 (Spirit 2015-1 EETC) 

 Table of Contents 

 

							
	 	 	 	  	Page	 
		
	Article I DEFINITIONS	  	 	2	  
	Section 1.01	 	 Definitions
	  	 	2	  
		
	Article II DECLARATION OF TRUST	  	 	8	  
	Section 2.01	 	 Declaration of Trust
	  	 	8	  
	Section 2.02	 	 Permitted Activities
	  	 	8	  
		
	Article III THE CERTIFICATES	  	 	8	  
	Section 3.01	 	 The Certificates
	  	 	8	  
	Section 3.02	 	 Terms and Conditions
	  	 	8	  
		
	Article IV ISSUANCE AND TRANSFER OF THE CLASS A CERTIFICATES	  	 	10	  
	Section 4.01	 	 Issuance of Class A Certificates
	  	 	10	  
	Section 4.02	 	 Legends
	  	 	10	  
	Section 4.03	 	 Book-Entry Provisions for Global Certificates
	  	 	11	  
		
	Article V DISTRIBUTION; STATEMENTS TO CERTIFICATEHOLDERS	  	 	12	  
	Section 5.01	 	 Statements to Certificateholders
	  	 	12	  
		
	Article VI DEFAULT	  	 	14	  
	Section 6.01	 	 Purchase Rights of Certificateholders
	  	 	14	  
		
	Article VII THE TRUSTEE	  	 	16	  
	Section 7.01	 	 Delivery of Documents; Delivery Dates
	  	 	16	  
	Section 7.02	 	 Withdrawal of Deposits
	  	 	17	  
	Section 7.03	 	 The Trustee
	  	 	18	  
	Section 7.04	 	 Representations and Warranties of the Trustee
	  	 	18	  
	Section 7.05	 	 Trustee Liens
	  	 	19	  
		
	Article VIII ADDITIONAL AMENDMENT; SUPPLEMENTAL AGREEMENTS	  	 	19	  
	Section 8.01	 	 Amendment of Sections 5.02, 6.07, 7.09, 8.04, 9.01, 12.01 and 12.02 of the Basic Agreement
	  	 	19	  
	Section 8.02	 	 Supplemental Agreements Without Consent of Class A Certificateholders
	  	 	19	  
	Section 8.03	 	 Supplemental Agreements with Consent of Class A Certificateholders
	  	 	20	  
	Section 8.04	 	 Consent of Trustees for Amendment of Section 6.01
	  	 	20	  
		
	Article IX MISCELLANEOUS PROVISIONS	  	 	21	  
	Section 9.01	 	 Final Termination Date
	  	 	21	  
	Section 9.02	 	 Basic Agreement Ratified
	  	 	21	  
	Section 9.03	 	 Governing Law
	  	 	21	  
	Section 9.04	 	 Counterparts
	  	 	21	  
	Section 9.05	 	 Intention of Parties
	  	 	21	  
	Section 9.06	 	 Submission to Jurisdiction
	  	 	21	  
	Section 9.07	 	 Successor and Assigns
	  	 	22	  
	Section 9.08	 	 Normal Commercial Relations
	  	 	22	  
	Section 9.09	 	 No Recourse against Others
	  	 	22	  

  

					
	EXHIBITS	  		  	
	Exhibit A	  	-	  	Form of Certificate
	Exhibit B	  	-	  	DTC Letter of Representations
	Exhibit C	  	-	  	Amendments to Basic Agreement

  

					
		  	i	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

							
	SCHEDULES	  		  		  	
	Schedule I	  	-	  	Series A Equipment Notes, Principal Amounts, Maturities and Aircraft	  	
	Schedule II	  	-	  	Note Documents	  	

  

					
		  	(ii)	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 TRUST SUPPLEMENT NO. 2015-1A 

This TRUST SUPPLEMENT NO. 2015-1A, dated as of August 11, 2015 (as amended from time to time, the “Trust Supplement”),
between SPIRIT AIRLINES, INC., a Delaware corporation (together with any successor in interest pursuant to Section 5.02 of the Basic Agreement, the “Company” or “Spirit”), and WILMINGTON TRUST, NATIONAL ASSOCIATION, a
national banking association, as trustee (together with any successor in interest and any successor or other trustee appointed as provided in the Basic Agreement, the “Trustee”) under the Pass Through Trust Agreement, dated as of
August 11, 2015, between the Company and Wilmington Trust, National Association (the “Basic Agreement”). 
 W I T N E S S E
T H: 
 WHEREAS, the Basic Agreement, which is unlimited as to the aggregate face amount of Certificates that may be issued and
authenticated thereunder, has heretofore been executed and delivered; 
 WHEREAS, Spirit has obtained commitments from Airbus S.A.S. for the
delivery scheduled on or prior to December 31, 2016 of the 15 aircraft described in Schedule I (the “Aircraft”), and Spirit wishes to finance the Aircraft pursuant to the NPA; 

WHEREAS, pursuant to each Indenture, Spirit will issue on a recourse basis two series of Equipment Notes secured by the related Aircraft and
may issue one or more series of Additional Equipment Notes and one or more series of Refinancing Equipment Notes; 
 WHEREAS, the Trustee
shall hereby declare the creation of the Class A Trust (as defined below) for the benefit of Holders of the Class A Certificates (as defined below) to be issued in respect of such Class A Trust, and the initial Holders of the
Class A Certificates, as grantors of such Class A Trust, by their respective acceptances of the Class A Certificates, shall join in the creation of the Class A Trust with the Trustee; 

WHEREAS, all Certificates to be issued by the Class A Trust will evidence Fractional Undivided Interests in the Class A Trust and
will have no rights, benefits or interests in respect of any other separate Trust or the property held therein; 
 WHEREAS, the Escrow Agent
and the Underwriters have contemporaneously herewith entered into an Escrow Agreement with the Escrow Paying Agent pursuant to which the Underwriters will deliver to the Escrow Agent the proceeds from the sale of the Class A Certificates, and
have irrevocably instructed the Escrow Agent to withdraw and pay funds from such proceeds upon request and proper certification by the Trustee to purchase Series A Equipment Notes pursuant to the NPA and the applicable Participation Agreements from
time to time prior to the Delivery Period Termination Date; 
 WHEREAS, the Escrow Agent on behalf of the Class A Certificateholders
has contemporaneously herewith entered into a Deposit Agreement with the Depositary under which the Deposits referred to therein will be made and from which Deposits it will withdraw funds to allow the Trustee to purchase Series A Equipment Notes
from time to time prior to the Delivery Period Termination Date; 
 WHEREAS, pursuant to the terms and conditions of the Basic Agreement, as
supplemented by this Trust Supplement, the NPA and the Participation Agreements, the Trustee on behalf of the Class A Trust shall from time to time purchase the Series A Equipment Notes issued by the Company pursuant to the Indentures related
to the Aircraft having the identical interest rate as, and final maturity dates not later than the final Regular Distribution Date of, the Class A Certificates issued hereunder and shall hold such Series A Equipment Notes in trust for the
benefit of the Class A Certificateholders; 

  
 Trust Supplement No.
2015-1A 
 (Spirit 2015-1 EETC) 

 WHEREAS, pursuant to the terms and conditions of the Intercreditor Agreement referred to in
Section 3.02(i) hereof, the Trustee and the other parties thereto will agree to the terms of subordination set forth therein; 

WHEREAS, all of the conditions and requirements necessary to make this Trust Supplement, when duly executed and delivered, a valid, binding
and legal instrument in accordance with its terms and for the purposes herein expressed, have been done, performed and fulfilled, and the execution and delivery of this Trust Supplement in the form and with the terms hereof have been in all respects
duly authorized; 
 WHEREAS, the Basic Agreement, as supplemented by this Trust Supplement, is subject to the provisions of the Trust
Indenture Act and shall, to the extent applicable, be governed by such provisions; 
 NOW, THEREFORE, in consideration of the mutual
agreements herein contained, and of other good and valuable consideration the receipt and adequacy of which are hereby acknowledged, the parties hereto agree as follows: 

ARTICLE I 
 DEFINITIONS

 Section 1.01 Definitions. Unless otherwise specified herein or the context otherwise requires, capitalized terms used but
not defined herein, including in the recitals hereto, shall have the respective meanings set forth, and shall be construed and interpreted in the manner described, in the Basic Agreement. As used herein, the term “Agreement” shall mean the
Basic Agreement, as supplemented by this Trust Supplement. For all purposes of the Basic Agreement as supplemented by this Trust Supplement, the following capitalized terms have the following meanings (any term used herein which is defined in both
this Trust Supplement and the Basic Agreement shall have the meaning assigned thereto in this Trust Supplement for purposes of the Basic Agreement as supplemented by this Trust Supplement). 

Account: Has the meaning ascribed thereto in the Deposit Agreement. 

Additional Certificateholder: Has the meaning specified in the Intercreditor Agreement. 

Additional Certificates: Has the meaning specified in the Intercreditor Agreement. 

Additional Equipment Notes: Has the meaning specified in the Intercreditor Agreement. 

Additional Trust: Has the meaning specified in the Intercreditor Agreement. 

Additional Trust Agreement: Has the meaning specified in the Intercreditor Agreement. 

Affiliate: Has the meaning specified in the Intercreditor Agreement. 

Agreement: Has the meaning specified in the first paragraph of Section 1.01 of this Trust Supplement. 

Aircraft: Has the meaning specified in the recitals to this Trust Supplement and any Replacement Aircraft (as defined in
the applicable Indenture) in replacement thereof in accordance with the applicable Indenture. 
 Applicable Funding
Date: Has the meaning specified in Section 7.01(b) of this Trust Supplement. 

  

					
		  	2	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 Applicable Notice of Purchase Withdrawal: Has the meaning specified in the
Escrow Agreement. 
 Applicable Participation Agreement: Has the meaning specified in Section 7.01(b) of this
Trust Supplement. 
 Basic Agreement: Has the meaning specified in the preamble to this Trust Supplement. 

Business Day: Has the meaning specified in the Intercreditor Agreement. 

Certificate: Means a Class A Certificate or a Class B Certificate, as applicable. 

Certificate Buy-Out Event: Has the meaning specified in the Intercreditor Agreement. 

Certificateholder: Means, with respect to any Class of Certificates, the Person in whose name a Certificate is
registered in the Register for the Certificates of such Class. 
 Class: Has the meaning specified in the
Intercreditor Agreement. 
 Class A Certificateholder: Means, at any time, any Certificateholder of one or more
Class A Certificates. 
 Class A Certificates: Has the meaning specified in Section 3.01 of this Trust
Supplement. 
 Class A Liquidity Facility: Has the meaning specified in the Intercreditor Agreement. 

Class A Liquidity Provider: Has the meaning specified in the Intercreditor Agreement. 

Class A Trust: Has the meaning specified in Section 2.01 of this Trust Supplement. 

Class B Certificateholder: Has the meaning specified in the Intercreditor Agreement. 

Class B Certificates: Has the meaning specified in the Intercreditor Agreement. 

Class B Trust: Has the meaning specified in the Intercreditor Agreement. 

Class B Trust Agreement: Has the meaning specified in the Intercreditor Agreement. 

Class B Trustee: Has the meaning specified in the Intercreditor Agreement. 

Code: Means the Internal Revenue Code of 1986, as amended. 

Company: Has the meaning specified in the preamble to this Trust Supplement. 

Corporate Trust Office: Has the meaning specified in the Intercreditor Agreement. 

Cut-off Date: Has the meaning specified in Section 3.02(b) of this Trust Supplement. 

Definitive Certificates: Has the meaning specified in Section 4.01(e) of this Trust Supplement. 

Delivery Period Termination Date: Has the meaning specified in the NPA. 

Deposit Agreement: Means, subject to Section 5 of the NPA, the Deposit Agreement (Class A), dated as of the date
hereof, relating to the Class A Certificates between the Depositary and the Escrow Agent, as the same may be amended, supplemented or otherwise modified from time to time in accordance with its terms. 

  

					
		  	3	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 Depositary: Means, subject to Section 5 of the NPA, Natixis, a French
société anonyme, acting via its New York Branch. 
 Deposits: Has the meaning specified in the Deposit
Agreement. 
 Distribution Date: Means a Regular Distribution Date or a Special Distribution Date. 

DTC: Has the meaning specified in Section 3.02(f) of this Trust Supplement. 

DTC Participants: Has the meaning specified in Section 4.01(b) of this Trust Supplement. 

Equipment Notes: Has the meaning specified in the Intercreditor Agreement. 

ERISA: Means the Employee Retirement Income Security Act of 1974, as amended. 

Escrow Agent: Means, initially, Wilmington Trust Company, a Delaware trust company, and any replacement or successor
therefor appointed in accordance with the Escrow Agreement. 
 Escrow Agreement: Means the Escrow and Paying Agent
Agreement (Class A), dated as of the date hereof, relating to the Class A Certificates, among the Escrow Agent, the Escrow Paying Agent, the Trustee and the Underwriters, as the same may be amended, supplemented or otherwise modified from time
to time in accordance with its terms. 
 Escrow Paying Agent: Means the “Paying Agent” as defined in the
Escrow Agreement. 
 Escrow Period Termination Date: Has the meaning specified in Section 5.01(c)(i) of this
Trust Supplement. 
 Escrow Receipt: Means a receipt substantially in the form annexed to the Escrow Agreement
representing a fractional undivided interest in the funds held in escrow thereunder. 
 Event of Default: With respect
to any Indenture, has the meaning specified in Section 4.01 of such Indenture. 
 Final Withdrawal: Has the
meaning specified in the Escrow Agreement. 
 Final Withdrawal Date: Has the meaning specified in the Escrow
Agreement. 
 Fractional Undivided Interests: Has the meaning specified in the Intercreditor Agreement. 

Funding Date: Has the meaning specified in the NPA. 

Funding Notice: Has the meaning specified in the NPA. 

Global Certificate: Has the meaning specified in Section 4.01(b) of this Trust Supplement. 

Holder: Means a Certificateholder. 

Indenture: Has the meaning specified in the Intercreditor Agreement. 

Indenture Event of Default: Means, with respect to any Indenture, any Event of Default (as such term is defined in such
Indenture). 

  

					
		  	4	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 Indirect Participants: Has the meaning specified in Section 4.01(b)
of this Trust Supplement. 
 Intercreditor Agreement: Has the meaning specified in Section 3.02(i) of this Trust
Supplement. 
 Issuance Date: Has the meaning specified in Section 7.01(a) of this Trust Supplement. 

Junior Additional Certificateholder: Means, with respect to any Additional Certificateholder exercising its right to
purchase Certificates under Section 6.01 of this Trust Supplement, any holder of any class of Additional Certificates that rank junior, in priority of payment of “Expected Distributions” for such class under the Intercreditor
Agreement, to the class of Additional Certificates held by such Additional Certificateholder. 
 Liquidity Provider:
Has the meaning specified in the Intercreditor Agreement. 
 Loan Trustee: Means, with respect to any Indenture, the
bank, trust company or other financial institution designated as loan trustee thereunder, and any successor to such loan trustee. 

Note Documents: Means, collectively, the Participation Agreements, the Indentures, each Indenture Supplement (as defined
in any Indenture), each Manufacturer’s Consent (as defined in any Indenture) and the Equipment Notes. 
 Notice of
Purchase Withdrawal: Has the meaning specified in the Deposit Agreement. 
 NPA: Means the Note Purchase
Agreement, dated as of the date hereof, among the Trustee, the Class B Trustee, the Company, the Escrow Agent, the Escrow Paying Agent and the Subordination Agent, providing for, among other things, the purchase of Series A Equipment Notes by the
Trustee on behalf of the Class A Trust, as the same may be amended, supplemented or otherwise modified from time to time, in accordance with its terms. 

Operative Agreements: Has the meaning specified in the Intercreditor Agreement. 

Other Agreements: Means (i) the Class B Trust Agreement, (ii) any Additional Trust Agreement and
(iii) any Refinancing Trust Agreement. 
 Other Trustees: Means the trustees under the Other Agreements, and any
successor or other trustee appointed as provided therein. 
 Other Trusts: Means the Class B Trust, any Additional
Trust or Trusts, or any Refinancing Trust or Trusts, in each case created by the applicable Other Agreement. 

Participation Agreement: Has the meaning specified in the Intercreditor Agreement. 

Paying Agent: Means, with respect to the Class A Certificates, the paying agent maintained and appointed for such
Class A Certificates pursuant to Section 7.12 of the Basic Agreement. 
 Person: Means any individual,
corporation, limited liability company, partnership, joint venture, association, joint-stock company, trust, trustee, unincorporated organization or government or any agency or political subdivision thereof. 

Plan: Means (i) a retirement plan or other employee benefit plan or arrangement, including for this purpose an
individual retirement account, annuity or Keogh plan, that is subject to Title I of ERISA or Section 4975 of the Code, (ii) any other entity whose underlying assets are 

  

					
		  	5	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 
deemed to include the assets of any plan or arrangement described in (i) above by virtue of the U.S. Department of Labor regulation in 29 CFR §2510.3-101, as modified by
Section 3(42) of ERISA (or any successor to such regulation), or (iii) such a plan or arrangement which is a foreign, church or governmental plan or arrangement exempt from Title I of ERISA and Section 4975 of the Code but subject to
a Similar Law. 
 Pool Balance: Means, as of any date, (i) the original aggregate face amount of the Class A
Certificates less (ii) the aggregate amount of all distributions made as of such date in respect of the Class A Certificates or in respect of Deposits other than distributions made in respect of interest or Premium or reimbursement of any
costs or expenses incurred in connection therewith. The Pool Balance as of any date shall be computed after giving effect to any distribution with respect to unused Deposits, the payment of principal, if any, of the Series A Equipment Notes or
payment with respect to other Trust Property and the distribution thereof to be made on such date. 
 Pool Factor:
Means, as of any Distribution Date, the quotient (rounded to the seventh decimal place) computed by dividing (i) the Pool Balance by (ii) the original aggregate face amount of the Class A Certificates. The Pool Factor as of any
Distribution Date shall be computed after giving effect to any distribution with respect to unused Deposits, payment of principal, if any, of the Series A Equipment Notes or payment with respect to other Trust Property and the distribution thereof
to be made on that date. 
 Premium: Has the meaning specified in the Intercreditor Agreement. 

Prospectus Supplement: Means the final prospectus supplement, dated July 28, 2015, relating to the offering of the
Certificates. 
 PTC Event of Default: Has the meaning specified in the Intercreditor Agreement. 

Rating Agencies: Has the meaning specified in the Intercreditor Agreement. 

Refinancing Certificateholder: Has the meaning specified in the Intercreditor Agreement. 

Refinancing Certificates: Has the meaning specified in the Intercreditor Agreement. 

Refinancing Equipment Notes: Has the meaning specified in the Intercreditor Agreement. 

Refinancing Trust: Has the meaning specified in the Intercreditor Agreement. 

Refinancing Trust Agreement: Has the meaning specified in the Intercreditor Agreement. 

Regular Distribution Date: Has the meaning specified in Section 3.02(c) of this Trust Supplement. 

Replacement Deposit Agreement: Has the meaning specified in the NPA. 

Replacement Depositary: Has the meaning specified in the NPA. 

Replacement Liquidity Facility: Has the meaning specified in the Intercreditor Agreement. 

Replacement Liquidity Provider: Has the meaning specified in the Intercreditor Agreement. 

Responsible Officer: Has the meaning specified in the Intercreditor Agreement. 

  

					
		  	6	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 Scheduled Payment: Has the meaning specified in the Intercreditor
Agreement. 
 Securities Act: Means the Securities Act of 1933, as amended. 

Series A Equipment Notes: Has the meaning specified in the Intercreditor Agreement. 

Similar Law: Means a foreign, federal, state, or local law which is substantially similar to the prohibited transaction
provisions of Title I of ERISA or Section 4975 of the Code. 
 Special Distribution Date: Means, with respect to
the Class A Certificates, each date on which a Special Payment is to be distributed as specified in this Agreement. 

Special Payment: Means any payment (other than a Scheduled Payment) in respect of, or any proceeds of, any Equipment
Note or the Collateral (as defined in any Indenture). 
 Special Payments Account: Means, with respect to the
Class A Certificates, the account or accounts created and maintained for such series pursuant to Section 4.01(b) of the Basic Agreement (as modified by Section 7.01(c) of this Trust Supplement) and this Trust Supplement. 

Spirit: Has the meaning specified in the preamble to this Trust Supplement. 

Subordination Agent: Has the meaning specified in the Intercreditor Agreement. 

Triggering Event: Has the meaning specified in the Intercreditor Agreement. 

Trust: Means the Class A Trust or the Class B Trust, as applicable. 

Trust Indenture Act: Means the Trust Indenture Act of 1939, as amended. 

Trust Property: Means (i) subject to the Intercreditor Agreement, the Series A Equipment Notes held as the property
of the Class A Trust, all monies at any time paid thereon and all monies due and to become due thereunder, (ii) funds from time to time deposited in the Certificate Account and the Special Payments Account and, subject to the Intercreditor
Agreement, any proceeds from the sale by the Trustee pursuant to Article VI of the Basic Agreement of any Equipment Notes and (iii) all rights of the Class A Trust and the Trustee, on behalf of the Class A Trust, under the
Intercreditor Agreement, the Escrow Agreement, the NPA and the Class A Liquidity Facility, including, without limitation, all rights to receive certain payments thereunder, and all monies paid to the Trustee on behalf of the Class A Trust
pursuant to the Intercreditor Agreement or the Class A Liquidity Facility, provided that rights with respect to the Deposits or under the Escrow Agreement, except for the right to direct withdrawals for the purchase of Series A Equipment
Notes to be held herein, will not constitute Trust Property. 
 Trust Supplement: Has the meaning specified in the
preamble hereto. 
 Trustee: Has the meaning specified in the preamble to this Trust Supplement. 

Underwriters: Means Citigroup Global Markets, Inc., Morgan Stanley & Co. LLC and Credit Suisse Securities (USA)
LLC. 
 Underwriting Agreement: Means the Underwriting Agreement, dated July 28, 2015, among the Underwriters and
the Company, as the same may be amended, supplemented or otherwise modified from time to time in accordance with its terms. 

Withdrawal Certificate: Has the meaning specified in the Escrow Agreement. 

  

					
		  	7	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 ARTICLE II 

DECLARATION OF TRUST 

Section 2.01 Declaration of Trust. The Trustee hereby declares the creation of a Trust, designated the “Spirit Airlines Pass
Through Trust 2015-1A” (the “Class A Trust”), for the benefit of the Holders of the Class A Certificates to be issued in respect of such Class A Trust, and the initial Holders of the Class A Certificates, as grantors of
such Class A Trust, by their respective acceptances of the Class A Certificates, join in the creation of such Class A Trust with the Trustee. The Trustee, by the execution and delivery of this Trust Supplement, acknowledges its
acceptance of all right, title and interest in and to the Trust Property to be acquired pursuant to Section 7.01(b) of this Trust Supplement, the NPA and the Participation Agreements and the Trustee will hold such right, title and interest for
the benefit of all present and future Holders of the Class A Certificates, upon the trusts set forth in the Basic Agreement and this Trust Supplement. The provisions of this Section 2.01 supersede and replace the provisions of
Sections 2.03 of the Basic Agreement, with respect to the Class A Trust. 
 Section 2.02 Permitted Activities. The
Class A Trust may only engage in the transactions contemplated by the Operative Agreements, subject to Section 9.05 of this Trust Supplement. 

ARTICLE III 
 THE
CERTIFICATES 
 Section 3.01 The Certificates. There is hereby created a series of Certificates to be issued under this
Agreement designated as “Spirit Airlines Pass Through Certificates, Series 2015-1A” (the “Class A Certificates”). Each Class A Certificate represents a Fractional Undivided Interest in the Class A Trust created
hereby. The Class A Certificates shall be the only instruments evidencing a Fractional Undivided Interest in the Class A Trust. The Class A Certificates do not represent indebtedness of the Class A Trust, and references herein to
interest accruing on the Class A Certificates are included for purposes of computation only. 
 Section 3.02 Terms and
Conditions. The terms and conditions applicable to the Class A Certificates and the Class A Trust are as follows: 
 (a) The
aggregate face amount of the Class A Certificates that may be authenticated and delivered under this Agreement (except for Class A Certificates authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu
of, other Class A Certificates pursuant to Sections 3.03, 3.04, 3.05 and 3.06 of the Basic Agreement and Section 4.03 of this Trust Supplement) is $455,622,000. 

(b) The “Cut-off Date” is the earlier of (i) the day after the Delivery Period Termination Date, and (ii) the date on
which a Triggering Event occurs. 
 (c) The distribution dates with respect to any payment of Scheduled Payments (each such distribution
date, a “Regular Distribution Date”) shall be April 1 and October 1 of each year, commencing on April 1, 2016, until payment of all of the Scheduled Payments to be made under the Equipment Notes has been made;
provided, however, that, if any such day shall not be a Business Day, the related distribution shall be made on the next succeeding Business Day without additional interest. The principal amount of the Series A Equipment Notes to be
held by the Class A Trust is scheduled for payment on April 1 and October 1 in certain years, commencing on October 1, 2016 and ending on the applicable date specified under the heading “Maturity” on Schedule I with
respect to the related Aircraft, as set out in Schedule III to the NPA. 

  

					
		  	8	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 (d) The Special Distribution Date with respect to the Class A Certificates means any
Business Day on which a Special Payment is to be distributed pursuant to this Agreement. 
 (e) At the Escrow Agent’s request under the
Escrow Agreement, the Trustee shall affix the corresponding Escrow Receipt to each Class A Certificate. In any event, any transfer or exchange of any Class A Certificate shall also effect a transfer or exchange of the related Escrow
Receipt. Prior to the Final Withdrawal Date, no transfer or exchange of any Class A Certificate shall be permitted unless the corresponding Escrow Receipt is attached thereto and also is so transferred or exchanged. By acceptance of any
Class A Certificate to which an Escrow Receipt is attached, each holder of such a Class A Certificate acknowledges and accepts the restrictions on transfer of the Escrow Receipt as set forth herein, in such Escrow Receipt, and in the
Escrow Agreement. 
 (f) The Class A Certificates shall be in the form attached hereto as Exhibit A, shall be Book-Entry
Certificates (subject to Section 3.05(d) of the Basic Agreement and Section 4.03 of this Trust Supplement), and shall be subject to the conditions set forth in the Letter of Representations between the Class A Trust and The Depository
Trust Company and any successor agency thereto (“DTC”), as initial Clearing Agency, attached hereto as Exhibit B. 
 (g) The
proceeds of the offering of Class A Certificates issued by the Class A Trust and related Escrow Receipts shall be deposited in the Accounts and shall be used in accordance with the Escrow Agreement, the Deposit Agreement and the NPA to
acquire from time to time the Series A Equipment Notes described in Schedule I that relate to the Aircraft and to the Note Documents described in Schedule II. 

(h) Any Person acquiring or accepting a Class A Certificate or an interest therein will, by such acquisition or acceptance, be deemed to
(i) represent and warrant to the Company, the Loan Trustees and the Trustee that either (1) no assets of a Plan or any trust established with respect to a Plan have been used to purchase or hold Class A Certificates or an interest
therein or (2) the purchase and holding of Class A Certificates or interests therein by such Person are exempt from the prohibited transaction restrictions of ERISA and the Code or provisions of Similar Law pursuant to one or more
prohibited transaction statutory or administrative exemptions or similar exemptions under Similar Law and (ii) direct the Trustee to invest the assets held in the Trust pursuant to, and take all other actions contemplated by, the terms and
conditions of the Basic Agreement, this Trust Supplement, the Intercreditor Agreement, the Deposit Agreement, the Escrow Agreement, the NPA, and each Participation Agreement. 

(i) The Class A Certificates will be subject to the following Intercreditor Agreement (and to the extent the terms thereof (including the
definitions of defined terms) are inconsistent with the terms of this Agreement, such Intercreditor Agreement shall control): that certain Intercreditor Agreement, dated as of the date hereof, among Wilmington Trust, National Association, as Trustee
and as Class B Trustee, Natixis, acting via its New York Branch, as each Liquidity Provider, and Wilmington Trust, National Association, as Subordination Agent thereunder (as may be amended, supplemented or otherwise modified from time to time in
accordance with its terms, the “Intercreditor Agreement”). Under Article VI hereof, the Holders of the Class B Certificates, Additional Certificates (if issued) or Refinancing Certificates (if issued) shall have the rights upon the
occurrence of a Certificate Buy Out Event set forth therein. The Trustee and, by acceptance of any Class A Certificate, each Certificateholder thereof, agrees to be bound by all of the provisions of the Intercreditor Agreement, including the
subordination provisions of Section 9.09 thereof. 
 (j) The Class A Certificates have the benefit of the Deposit Agreement and
the Escrow Agreement. 

  

					
		  	9	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 (k) The Class A Certificates will have the benefit of the following liquidity facility: that
certain Revolving Credit Agreement (2015-1A), dated as of the date hereof, between Wilmington Trust, National Association, as Subordination Agent under the Intercreditor Agreement, as agent and trustee for the Class A Trust, and the
Class A Liquidity Provider. 
 (l) The Responsible Party is the Company. 

(m) The Company, any other obligor upon the Class A Certificates, and any Affiliate of any thereof may acquire, tender for, purchase,
own, hold, become the pledgee of and otherwise deal with any Class A Certificate. 
 (n) The “particular sections of the Note
Purchase Agreement”, for purposes of clause (3) of Section 7.07 of the Basic Agreement, are Section 4.02 of each Participation Agreement. 

ARTICLE IV 
 ISSUANCE
AND TRANSFER OF THE CLASS A CERTIFICATES 
 Section 4.01 Issuance of Class A Certificates. (a) The Class A
Certificates will be issued in minimum denominations of $2,000 (or such other denomination that is the lowest integral multiple of $1,000 that is, at the time of issuance, equal to at least 1,000 euros) and integral multiples of $1,000 in excess
thereof, except that one Certificate may be issued in a different denomination. Each Class A Certificate shall be dated the date of its authentication. 

(b) The Class A Certificates shall be issued initially in the form of one or more global Certificates in definitive, fully registered
form without interest coupons, substantially in the form of Exhibit A hereto (each, a “Global Certificate”), duly executed and authenticated by the Trustee as hereinafter provided. Each Global Certificate will be registered in the
name of a nominee for DTC for credit to the account of members of, or participants in, DTC (“DTC Participants”) or to the account of indirect participants that clear through or maintain a custodial relationship with a DTC Participant,
either directly or indirectly (“Indirect Participants”), and will be deposited with the Trustee, as custodian for DTC. The aggregate principal amount of a Global Certificate may from time to time be decreased by adjustments made on the
records of DTC or its nominee, or of the Trustee, as custodian for DTC or its nominee, as hereinafter provided, which adjustments shall be conclusive as to the aggregate principal amount of any such Global Certificate. 

(c) [Reserved] 
 (d) [Reserved]

 (e) Certificated Certificates in registered form shall be issued in substantially the form set forth as Exhibit A hereto (the
“Definitive Certificates”) and shall be in fully registered form and shall be typed, printed, lithographed or engraved or produced by any combination of these methods or may be produced in any other manner, all as determined by the
officers executing such Definitive Certificates, as evidenced by their execution of such Definitive Certificates. 
 Section 4.02
Legends. (a) Each Global Certificate shall bear the following legend on the face thereof: 
 UNLESS THIS CERTIFICATE IS PRESENTED
BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE TRUSTEE OR ITS AGENT FOR 

  

					
		  	10	  	Trust Supplement No. 2015-1A
		  		  	(Spirit 2015-1 EETC)

 
REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IN EXCHANGE FOR THIS CERTIFICATE IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED
BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO
ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. 
 (b) Each Class A
Certificate shall bear the following legend on the face thereof: 
 BY ITS ACQUISITION HEREOF, THE HOLDER REPRESENTS THAT EITHER (A) NO
ASSETS OF A PLAN OR ANY TRUST ESTABLISHED WITH RESPECT TO A PLAN HAVE BEEN USED TO PURCHASE OR HOLD THIS CERTIFICATE OR AN INTEREST HEREIN OR (B) THE PURCHASE AND HOLDING OF THIS CERTIFICATE OR INTEREST HEREIN BY SUCH A PERSON ARE EXEMPT FROM
THE PROHIBITED TRANSACTION RESTRICTIONS OF ERISA AND THE CODE OR PROVISIONS OF SIMILAR LAW PURSUANT TO ONE OR MORE PROHIBITED TRANSACTION STATUTORY OR ADMINISTRATIVE EXEMPTIONS OR SIMILAR EXEMPTIONS UNDER SIMILAR LAW. CERTAIN TERMS USED IN THIS
PARAGRAPH SHALL HAVE THE MEANINGS SPECIFIED IN THE AGREEMENT. 
 Section 4.03 Book-Entry Provisions for Global Certificates.
(a) DTC Participants shall have no rights under this Agreement with respect to any Global Certificate held on their behalf by DTC, or the Trustee as its custodian, and DTC may be treated by the Trustee and any agent of the Trustee as the
absolute owner of such Global Certificate for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall prevent the Trustee or any agent of the Trustee from giving effect to any written certification, proxy or other authorization
furnished by DTC or shall impair, as between DTC and its DTC Participants, the operation of customary practices governing the exercise of the rights of a holder of any Class A Certificate. Upon the issuance of any Global Certificate, the
Registrar or its duly appointed agent shall record Cede & Co. or another nominee of DTC as the registered holder of such Global Certificate. 

(b) Transfers of any Global Certificate shall be limited to transfers of such Global Certificate in whole, but not in part, to nominees of
DTC, its successor or such successor’s nominees. Beneficial interests in Global Certificates may be transferred in accordance with the rules and procedures of DTC and the provisions of Section 4.02 of this Trust Supplement. Beneficial
interests in Global Certificates shall be delivered to all beneficial owners thereof in the form of Definitive Certificates, if (i) DTC notifies the Trustee in writing that it is no longer willing or able to discharge properly its
responsibilities as depositary for the Global Certificates, and a successor depositary is not appointed by the Trustee within 90 days of such notice, (ii) the Company, at its option, advises the Trustee in writing that it elects to
terminate the book-entry system through DTC or (iii) after the occurrence and during the continuance of an Event of Default, Class A Certificateholders with Fractional Undivided Interests aggregating not less than a majority in interest in
the Class A Trust advise the Trustee, the Company and DTC through DTC Participants in writing that the continuation of a book-entry system through DTC (or a successor thereto) is no longer in the Class A Certificateholders’ best
interests. Neither the Company nor the Trustee shall be liable if the Company or the Trustee is unable to locate a qualified successor clearing system. 

(c) [Reserved] 

  

					
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 (d) In connection with the transfer of the entire amount of a Global Certificate to the
beneficial owners thereof pursuant to paragraph (b) of this Section 4.03, such Global Certificate shall be deemed to be surrendered to the Trustee for cancellation, and the Trustee shall execute, authenticate and deliver to each beneficial
owner, in exchange for the beneficial interest thereof in such Global Certificate, an equal aggregate principal amount of Definitive Certificates of authorized denominations, in each case as such beneficial owner and related aggregate principal
amount shall have been identified and otherwise set forth (together with such other information as may be required for the registration of such Definitive Certificates) in registration instructions that shall have been delivered by or on behalf of
DTC to the Trustee. None of the Company, the Registrar, the Paying Agent nor the Trustee shall be liable for any delay in delivery of such registration instructions and each such Person may conclusively rely on, and shall be protected in relying on,
such registration instructions. Upon the issuance of any Definitive Certificate, the Trustee shall recognize the Person in whose name such Definitive Certificate is registered in the Register as a Certificateholder hereunder. 

(e) The registered Holder of a Global Certificate may grant proxies and otherwise authorize any Person, including DTC Participants and Persons
that may hold interests through DTC Participants, to take any action which a Holder is entitled to take under this Agreement or the Class A Certificates. 

(f) Neither the Company, nor the Trustee, nor the Registrar, nor the Paying Agent shall have any responsibility or liability for: (i) any
aspect of the records relating to or payments made on account of beneficial ownership interests in the Global Certificates, (ii) maintaining, supervising or reviewing any records relating to such beneficial ownership interests or (iii) the
performance by DTC, any DTC Participant or any Indirect Participant of their respective obligations under the rules, regulations and procedures creating and affecting DTC and its operation or any other statutory, regulatory, contractual or customary
procedures governing their obligations. 
 ARTICLE V 

DISTRIBUTION; STATEMENTS TO CERTIFICATEHOLDERS 

Section 5.01 Statements to Certificateholders. (a) On each Regular Distribution Date and Special Distribution Date, the
Trustee will include with each distribution to the Class A Certificateholders a statement, giving effect to the distribution to be made on such Regular Distribution Date or Special Distribution Date, setting forth the following information (per
$1,000 aggregate face amount of Class A Certificates as to clauses (ii), (iii), (iv) and (v) below): 
 (i)
the aggregate amount of funds distributed on such Distribution Date under this Agreement and the Escrow Agreement, indicating the amount, if any, allocable to each source (including any portion thereof paid by the Class A Liquidity Provider);

 (ii) the amount of such distribution under this Agreement allocable to principal and the amount allocable to Premium (if
any); 
 (iii) the amount of such distribution under this Agreement allocable to interest (including any portion thereof paid
by the Class A Liquidity Provider); 
 (iv) the amount of such distribution under the Escrow Agreement allocable to
interest, if any; 
 (v) the amount of such distribution under the Escrow Agreement allocable to unused Deposits, if any; and

 (vi) the Pool Balance and the Pool Factor. 

  

					
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 With respect to the Class A Certificates registered in the name of DTC or its nominee, on
the Record Date prior to each Regular Distribution Date and Special Distribution Date, the Trustee will request that DTC post on its Internet bulletin board a securities position listing setting forth the names of all the DTC Participants reflected
on DTC’s books as holding interests in the Class A Certificates on such Record Date. On each Regular Distribution Date and Special Distribution Date, the Trustee will mail to each such DTC Participant whose name has been provided by DTC
the statement described above and will make available additional copies as requested by such DTC Participants for forwarding to holders of interests in the Class A Certificates. 

(b) Within a reasonable period of time after the end of each calendar year but not later than the latest date permitted by law, the Trustee
shall furnish to each Person who at any time during such calendar year was a Class A Certificateholder of record a statement containing the sum of the amounts determined pursuant to clauses (a)(i), (a)(ii), (a)(iii), (a)(iv) and (a)(v)
above for such calendar year or, in the event such Person was a Class A Certificateholder of record during a portion of such calendar year, for the applicable portion of such year, and such other items as are readily available to the Trustee
and which a Class A Certificateholder may reasonably request as necessary for the purpose of such Certificateholder’s preparation of its United States federal income tax returns or foreign income tax returns. With respect to Class A
Certificates registered in the name of DTC or its nominee, such statement and such other items shall be prepared on the basis of information supplied to the Trustee by the DTC Participants and shall be delivered by the Trustee to such DTC
Participants to be available for forwarding by such DTC Participants to the holders of interests in the Class A Certificates. 
 (c)
Promptly following: 
 (i) the Delivery Period Termination Date, or, if later, the date of any Final Withdrawal (the later of
such dates, the “Escrow Period Termination Date”), if there has been, on or prior to the Escrow Period Termination Date, (A) any change in the information set forth in clauses (y) and (z) below from that set forth on page
S-106 of the Prospectus Supplement, or (B) any early redemption or purchase of, or any default in the payment of principal or interest in respect of, any of the Series A Equipment Notes held in the Class A Trust, any Event of Loss
Withdrawal or any Final Withdrawal, and 
 (ii) the date of any early redemption or purchase of, or any default in the
payment of principal or interest in respect of, any of the Series A Equipment Notes held in the Class A Trust, in either case described in this clause (ii), occurring after the Escrow Period Termination Date, 

the Trustee shall furnish to Class A Certificateholders of record on such date a statement setting forth (x) the expected Pool
Balances for each subsequent Regular Distribution Date following the Delivery Period Termination Date, (y) the related Pool Factors for such Regular Distribution Dates and (z) the expected principal distribution schedule of the Series A
Equipment Notes, in the aggregate, held as Trust Property at the date of such notice. With respect to the Class A Certificates registered in the name of DTC, on the Delivery Period Termination Date, the Trustee will request from DTC a
securities position listing setting forth the names of all DTC Participants reflected on DTC’s books as holding interests in the Class A Certificates on such date. The Trustee will mail to each such DTC Participant the statement described
above and will make available additional copies as requested by such DTC Participant for forwarding to holders of interests in the Class A Certificates. 

(d) If the aggregate principal payments scheduled for a Regular Distribution Date prior to the Delivery Period Termination Date differ from
the amount thereof set forth for the Class A Certificates on page S-106 of the Prospectus Supplement, by no later than the 15th day prior to such Regular Distribution Date, the Trustee shall mail written notice of the actual amount of such
scheduled payments to the Class A Certificateholders of record as of a date within 15 Business Days prior to the date of mailing. 

(e) The provisions of this Section 5.01 supersede and replace the provisions of Section 4.03 of the Basic Agreement in their
entirety with respect to the Class A Trust. 

  

					
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 ARTICLE VI 

DEFAULT 

Section 6.01 Purchase Rights of Certificateholders. (a) By acceptance of its Class A Certificate, each Class A
Certificateholder agrees that at any time after the occurrence and during the continuation of a Certificate Buy-Out Event: 

(i) so long as no Additional Certificateholder has elected to exercise its rights to purchase Certificates pursuant to, and
given notice of such election in accordance with, this Section 6.01(a) (upon such election and notification thereof, the right specified in this Section 6.01(a)(i) shall be suspended and (x) upon consummation of the purchase pursuant
to such election, be terminated with respect to such Certificate Buy-Out Event, or (y) upon failure to consummate such purchase on the proposed purchase date, such right shall be revived), each Class B Certificateholder (other than the Company
or any of its Affiliates) shall have the right to purchase all, but not less than all, of the Class A Certificates upon ten days’ prior written irrevocable notice to the Trustee, the Class B Trustee and each other Class B
Certificateholder, on the third Business Day following the expiration of such ten day notice period, provided that (A) if prior to the end of such ten-day period any other Class B Certificateholder(s) (other than the Company or any of its
Affiliates) notifies such purchasing Class B Certificateholder that such other Class B Certificateholder(s) want(s) to participate in such purchase, then such other Class B Certificateholder(s) (other than the Company or any of its Affiliates) may
join with the purchasing Class B Certificateholder to purchase all, but not less than all, of the Class A Certificates pro rata based on the Fractional Undivided Interest in the Class B Trust held by each such Class B Certificateholder and
(B) upon consummation of such purchase no Class B Certificateholder shall have a right to purchase the Class A Certificates pursuant to this Section 6.01(a)(i) during the continuance of such Certificate Buy-Out Event, 

(ii) if any Additional Certificates are issued by an Additional Trust, so long as no Junior Additional Certificateholder (if
any) has elected to exercise its rights to purchase Certificates pursuant to, and given notice of such election in accordance with, this Section 6.01(a) (upon such election and notification thereof, the right specified in this
Section 6.01(a)(ii) shall be suspended and (x) upon consummation of the purchase pursuant to such election, be terminated with respect to such Certificate Buy-Out Event, or (y) upon failure to consummate such purchase on the proposed
purchase date, such right shall be revived), each Additional Certificateholder (other than the Company or any of its Affiliates) shall have the right (which shall not expire upon any purchase of the Class A Certificates pursuant to
clause (i) above) to purchase all, but not less than all, of the Class A Certificates, the Class B Certificates and any Additional Certificates ranked senior, in priority of payment of “Expected Distributions” therefor under the
Intercreditor Agreement, to the Additional Certificates held by the purchasing Additional Certificateholder upon ten days’ prior written irrevocable notice to the Trustee, the Class B Trustee, the trustee of any Additional Trust with respect to
any Additional Certificates that rank senior, in priority of payment of “Expected Distributions” therefor under the Intercreditor Agreement, to the Additional Certificates held by the purchasing Additional Certificateholder and each other
Additional Certificateholder of the same class, on the third Business Day following the expiration of such ten-day notice period, provided that (A) if prior to the end of such ten-day period any

  

					
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other Additional Certificateholder(s) of such class (other than the Company or any of its Affiliates) notifies such purchasing Additional Certificateholder that such other Additional
Certificateholder(s) want(s) to participate in such purchase, then such other Additional Certificateholder(s) (other than the Company or any of its Affiliates) may join with the purchasing Additional Certificateholder to purchase all, but not less
than all, of the Class A Certificates, the Class B Certificates and such senior Additional Certificates pro rata based on the Fractional Undivided Interest in the applicable Additional Trust held by each such Additional Certificateholder and
(B) upon consummation of such purchase no Additional Certificateholder of such class shall have a right to purchase the Class A Certificates, the Class B Certificates and such senior Additional Certificates pursuant to this
Section 6.01(a)(ii) during the continuance of such Certificate Buy-Out Event, and 
 (iii) if any Refinancing
Certificates are issued, each Refinancing Certificateholder shall have the same right (subject to the same terms and conditions) to purchase Certificates pursuant to this Section 6.01(a) (and to receive notice in connection therewith) as the
Holders of the Class that such Refinancing Certificates refinanced. 
 The purchase price with respect to the Class A Certificates
shall be equal to the Pool Balance of the Class A Certificates, together with accrued and unpaid interest in respect thereof to the date of such purchase, and any other amounts then due and payable to the Class A Certificateholders under
this Agreement, the Intercreditor Agreement, the Escrow Agreement, any Series A Equipment Note held as the property of the Class A Trust or the related Indenture and Participation Agreement or on or in respect of the Class A Certificates
but without any Premium, provided, however, that if such purchase occurs after (x) a record date specified in Section 2.03 of the Escrow Agreement relating to the distribution of unused Deposits and/or accrued and unpaid
interest on Deposits and prior to or on the related distribution date under the Escrow Agreement, such purchase price shall be reduced by the aggregate amount of unused Deposits and/or interest to be distributed under the Escrow Agreement (which
deducted amounts shall remain distributable to, and may be retained by, the Class A Certificateholders as of such record date) or (y) the Record Date relating to any Distribution Date, such purchase price shall be reduced by the amount to
be distributed hereunder on such related Distribution Date (which deducted amounts shall remain distributable to, and may be retained by, the Class A Certificateholders as of such Record Date); provided further that no such
purchase of Class A Certificates pursuant to this Section 6.01(a) shall be effective unless the purchaser(s) shall certify to the Trustee that contemporaneously with such purchase, such purchaser(s) is purchasing, pursuant to the terms of
this Agreement, the Class B Trust Agreement, the applicable Additional Trust Agreement (if any) or the applicable Refinancing Trust Agreement (as the case may be), and the Intercreditor Agreement, all of the Class A Certificates, the Class B
Certificates and, if applicable, the Additional Certificates that rank senior, in priority of payment of “Expected Distributions” therefor under the Intercreditor Agreement, to the Additional Certificates held by the purchasing Additional
Certificateholder(s) and, if applicable, the Refinancing Certificates that are senior to the securities held by such purchaser(s). Each payment of the purchase price of the Class A Certificates referred to in the first sentence of this
paragraph shall be made to an account or accounts designated by the Trustee and each such purchase shall be subject to the terms of this Section 6.01(a). Each Class A Certificateholder agrees by its acceptance of its Class A
Certificate that it will, upon payment from such Class B Certificateholder(s), Additional Certificateholder(s) or Refinancing Certificateholder(s), as the case may be, of the purchase price set forth in the first sentence of this paragraph,
forthwith sell, assign, transfer and convey to the purchaser(s) thereof (without recourse, representation or warranty of any kind except as to its own acts) all of the right, title, interest and obligation of such Class A Certificateholder in
this Agreement, the Escrow Agreement, the Deposit Agreement, the Intercreditor Agreement, the Class A Liquidity Facility, the NPA, the Note Documents and all Class A Certificates and Escrow Receipts held by such Class A
Certificateholder (excluding all right, title and interest under any of the foregoing to the extent such right, title or interest is with respect to 

  

					
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an obligation not then due and payable as respects any action or inaction or state of affairs occurring prior to such sale) and the purchaser(s) shall assume all of such Class A
Certificateholder’s obligations under this Agreement, the Escrow Agreement, the Deposit Agreement, the Intercreditor Agreement, the Class A Liquidity Facility, the NPA, the Note Documents and all such Class A Certificates and Escrow
Receipts. The Class A Certificates will be deemed to be purchased on the date payment of the purchase price is made notwithstanding the failure of any Class A Certificateholder to deliver any Class A Certificate and, upon such a
purchase, (i) the Class A Certificateholders shall have no further rights with respect to the Class A Certificates and (ii) if the purchaser(s) shall so request, each such Class A Certificateholder will comply with all the
provisions of Section 3.04 of the Basic Agreement and the applicable provisions of this Trust Supplement to enable new Class A Certificates to be issued to the purchaser(s) in such denominations otherwise authorized under this Agreement as
it shall request. All charges and expenses in connection with the issuance of any such new Class A Certificates shall be borne by the purchaser(s) thereof. 

(b) This Section 6.01 supplements and, to the extent inconsistent with any provision of Section 6.01(b) of the Basic Agreement,
replaces the provisions of Section 6.01(b) of the Basic Agreement. Notwithstanding anything to the contrary set forth herein or in any Operative Agreement, the provisions of this Section 6.01 may not be amended in any manner without the
consent of each Class A Certificateholder, each Class B Certificateholder and each Additional Certificateholder (if any) or, as the case may be, Refinancing Certificateholder (if any) (in each case, other than the Company or any of its
Affiliates in its respective capacity as a Certificateholder) that would be adversely affected thereby; provided that the purchase price under this Section 6.01 (as in effect on the date hereof) for any Certificate held by the Company or
any of its Affiliates shall not be modified without the prior written consent of the Company. For the avoidance of doubt, if a Certificate Buy-Out Event ceases to exist and another Certificate Buy-Out Event occurs and is continuing, the purchase
rights set forth in Section 6.01(a) shall be revived notwithstanding any exercise of such rights during the continuance of any preceding Certificate Buy-Out Event. 

ARTICLE VII 
 THE
TRUSTEE 
 Section 7.01 Delivery of Documents; Delivery Dates. (a) The Trustee is hereby directed (i) to execute
and deliver the Intercreditor Agreement, the Escrow Agreement and the NPA on or prior to the date of the initial issuance of the Class A Certificates (the “Issuance Date”), each in the form delivered to the Trustee by the Company, and
(ii) subject to the respective terms thereof, to perform its obligations thereunder. Upon request of the Company and the satisfaction or waiver of the closing conditions specified in the Underwriting Agreement, the Trustee shall execute,
deliver, authenticate, issue and sell Class A Certificates in authorized denominations equaling in the aggregate the amount set forth, with respect to the Class A Trust, in Schedule I to the Underwriting Agreement evidencing the entire
ownership interest in the Class A Trust, which amount equals the maximum aggregate principal amount of Series A Equipment Notes which may be purchased from time to time by the Trustee pursuant to the NPA. Except as provided in
Sections 3.03, 3.04, 3.05 and 3.06 of the Basic Agreement or Section 4.03 of this Trust Supplement, the Trustee shall not execute, authenticate or deliver Class A Certificates in excess of the aggregate amount specified in this
paragraph. The provisions of this Section 7.01(a) supersede and replace the first three sentences of Section 2.02(a) of the Basic Agreement and the first sentence of Section 3.02(a) of the Basic Agreement, with respect to the
Class A Trust. 
 (b) On or after the Issuance Date, the Company may deliver from time to time, and in accordance with
Section 1(b) of the NPA, to the Trustee a Funding Notice relating to one or more Series A Equipment Notes. After receipt of such a Funding Notice and in any case no later than one Business Day prior to a Funding Date as to which such Funding
Notice relates (the “Applicable Funding 

  

					
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Date”), the Trustee shall (as and when specified in the Funding Notice) deliver to the Escrow Agent the Withdrawal Certificates and related Applicable Notices of Purchase Withdrawal, as
contemplated by Section 1.02(c) of the Escrow Agreement and by such Funding Notice. The Trustee shall (as and when specified in such Funding Notice), subject to the conditions set forth in Section 2 of the NPA, enter into and perform its
obligations under the Participation Agreement specified in such Funding Notice (the “Applicable Participation Agreement”) and cause such certificates, documents and legal opinions relating to the Trustee to be duly delivered as required by
the Applicable Participation Agreement. If at any time prior to the Applicable Funding Date, the Trustee receives from the Company a notice pursuant to the first sentence of Section 1(f) of the NPA, then the Trustee shall give notice to the
Depositary (with a copy to the Escrow Agent) of the cancellation of such Notice of Purchase Withdrawal relating to such Deposit or Deposits on such Applicable Funding Date as contemplated by Section 2.3 of the Deposit Agreement. Upon
satisfaction of the conditions specified in the NPA and the Applicable Participation Agreement, the Trustee shall purchase the applicable Series A Equipment Notes with the proceeds of the withdrawals of one or more Deposits made on the Applicable
Funding Date in accordance with the terms of the Deposit Agreement and the Escrow Agreement. The purchase price of such Series A Equipment Notes shall equal the principal amount of such Series A Equipment Notes. Amounts withdrawn from such Deposit
or Deposits in excess of the purchase price of the Series A Equipment Notes or to the extent not applied on the Applicable Funding Date to the purchase price of the Series A Equipment Notes shall be re-deposited by the Trustee with the Depositary on
the Applicable Funding Date in accordance with the terms of the Deposit Agreement. The provisions of this Section 7.01(b) supersede and replace the last sentence of Section 2.02(a) of the Basic Agreement and the provisions of
Section 2.02(b) of the Basic Agreement with respect to the Class A Trust, and no provisions of the Basic Agreement relating to Postponed Notes and Section 2.02(b) of the Basic Agreement shall apply to the Class A Trust. 

(c) With respect to the Class A Trust, Section 4.01(b) of the Basic Agreement is superseded and replaced in its entirety with the
following: “The Trustee shall establish and maintain on behalf of the Class A Certificateholders a Special Payments Account as one or more accounts, which shall be non-interest bearing except as provided in Section 4.04 of the Basic
Agreement. The Trustee shall hold the Special Payments Account in trust for the benefit of the Class A Certificateholders and shall make or permit withdrawals therefrom only as provided in the Agreement or the Intercreditor Agreement. On each
day when one or more Special Payments are made to the Trustee under the Intercreditor Agreement, the Trustee, upon receipt thereof, shall immediately deposit the aggregate amount of such Special Payments in the Special Payments Account.” 

(d) With respect to the Class A Trust, the second through fifth sentences of Section 4.02(c) of the Basic Agreement shall be
superseded and replaced in their entirety with the following sentence: “Subject to the provisions of the Intercreditor Agreement: (i) in the event of redemption or purchase of Series A Equipment Notes held in the Class A Trust, such
notice shall be mailed not less than 15 days prior to the Special Distribution Date for the Special Payment resulting from such redemption or purchase, which Special Distribution Date shall be the date of such redemption or purchase; and
(ii) in the case of any other Special Payments, such notice of Special Payment shall be mailed as soon as practicable after the Trustee has confirmed that it has received funds for such Special Payment and shall state the Special Distribution
Date for such Special Payment, which shall occur 15 days after the date of such notice of Special Payment or (if such 15th day is not practicable) as soon as practicable thereafter.” 

(e) With respect to the Class A Trust, clause (ii) of the sixth sentence of Section 4.02(c) of the Basic Agreement shall be
amended by deleting in its entirety the parenthetical phrase “(taking into account any payment to be made by the Company pursuant to Section 2.02(b)).” 

Section 7.02 Withdrawal of Deposits. If any Deposits remain outstanding on the Business Day next succeeding the Cut-off Date, the
Trustee shall promptly give the Escrow Agent notice, as contemplated by clause (ii) of Section 1.02(f) of the Escrow Agreement, that the Trustee’s obligation to purchase Series A Equipment Notes under the NPA has terminated and the
Cut-off Date has occurred. 

  

					
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 Section 7.03 The Trustee. (a) Subject to Section 7.04 of this Trust
Supplement and Section 7.15 of the Basic Agreement, the Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Trust Supplement, the Intercreditor Agreement, the Deposit Agreement, the
NPA or the Escrow Agreement or the due execution hereof or thereof by the Company or the other parties thereto (other than the Trustee), or for or in respect of the recitals and statements contained herein or therein, all of which recitals and
statements are made solely by the Company or the other parties thereto (other than the Trustee), except that the Trustee hereby represents and warrants that each of this Trust Supplement, the Basic Agreement, each Class A Certificate, the
Intercreditor Agreement, the NPA and the Escrow Agreement has been executed and delivered by one of its officers who is duly authorized to execute and deliver such document on its behalf. 

(b) In addition to the requirements in Section 7.08 of the Basic Agreement, the Trustee shall at all times be a bank or trust company,
organized and doing business under the laws of the United States or any state thereof, a substantial part of the business of which consists of (i) receiving deposits and making loans or (ii) exercising fiduciary powers similar to those
permitted to national banks by the Comptroller of the Currency, and which is subject to supervision and examination by state or federal authority having supervision over banking institutions. 

Section 7.04 Representations and Warranties of the Trustee. The Trustee hereby represents and warrants that: 

(a) the Trustee has full power, authority and legal right to execute, deliver and perform this Trust Supplement, the Intercreditor Agreement,
the Escrow Agreement, the NPA, the Class A Certificates and the Note Documents to which it is or is to become a party and has taken all necessary action to authorize the execution, delivery and performance by it of this Trust Supplement, the
Intercreditor Agreement, the Escrow Agreement, the NPA, the Class A Certificates and the Note Documents to which it is or is to become a party; 

(b) the execution, delivery and performance by the Trustee of this Trust Supplement, the Intercreditor Agreement, the Escrow Agreement, the
NPA, the Class A Certificates and the Note Documents to which it is or is to become a party (i) will not violate any provision of any United States federal law governing its banking powers or the law of the state of the United States where
it is located governing the banking and trust powers of the Trustee or any order, writ, judgment, or decree of any court, arbitrator or governmental authority applicable to the Trustee or any of its assets, (ii) will not violate any provision
of the articles of association or by-laws of the Trustee, and (iii) will not violate any provision of, or constitute, with or without notice or lapse of time, a default under, or result in the creation or imposition of any lien on any
properties included in the Trust Property pursuant to the provisions of, any mortgage, indenture, contract, agreement or other undertaking to which it is a party, which violation, default or lien could reasonably be expected to have an adverse
effect on the Trustee’s performance or ability to perform its duties hereunder or thereunder or on the transactions contemplated herein or therein; 

(c) the execution, delivery and performance by the Trustee of this Trust Supplement, the Intercreditor Agreement, the Escrow Agreement, the
NPA, the Class A Certificates and the Note Documents to which it is or is to become a party will not require the authorization, consent, or approval of, the giving of notice to, the filing or registration with, or the taking of any other action
in respect of, any governmental authority or agency of the United States or the state of the United States where it is located regulating the banking and corporate trust activities of the Trustee; and 

(d) this Trust Supplement, the Intercreditor Agreement, the Escrow Agreement, the NPA, the Class A Certificates and the Note Documents to
which it is or is to become a party have been, 

  

					
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or will be, as applicable, duly executed and delivered by the Trustee and constitute, or will constitute, as applicable, the legal, valid and binding agreements of the Trustee, enforceable
against it in accordance with their respective terms; provided, however, that enforceability may be limited by (i) applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the rights of creditors
generally and (ii) general principles of equity. 
 Section 7.05 Trustee Liens. The Trustee in its individual capacity
agrees, in addition to the agreements contained in Section 7.17 of the Basic Agreement, that it will at its own cost and expense promptly take any action as may be necessary to duly discharge and satisfy in full any Trustee’s Liens on or
with respect to the Trust Property which are attributable to the Trustee in its individual capacity and which are unrelated to the transactions contemplated by the Intercreditor Agreement or the NPA. 

ARTICLE VIII 

ADDITIONAL AMENDMENT; SUPPLEMENTAL AGREEMENTS 

Section 8.01 Amendment of Sections 5.02, 6.07, 7.09, 8.04, 9.01, 12.01 and 12.02 of the Basic Agreement. For purposes of this
Agreement, the Basic Agreement shall be deemed amended as follows: 
 (a) Section 5.02 of the Basic Agreement shall be deemed amended
and restated in its entirety to read as set forth in Part A of Exhibit C. 
 (b) Section 6.07 of the Basic Agreement shall be deemed
amended and restated in its entirety to read as set forth in Part B of Exhibit C. 
 (c) Section 7.09 of the Basic Agreement shall be
deemed amended by amending and restating the second sentence of subsection (e) thereof in its entirety to read as set forth in Part C of Exhibit C. 

(d) Section 8.04 of the Basic Agreement shall be deemed amended by amending and restating subsection (a) thereof in its entirety to
read as set forth in Part D of Exhibit C. 
 (e) Section 9.01 of the Basic Agreement shall be deemed amended by amending and restating
clause (4) thereof in its entirety to read as set forth in Part E of Exhibit C. 
 (f) Section 12.01 of the Basic Agreement shall
be deemed amended and restated in its entirety to read as set forth in Part F of Exhibit C. 
 (g) Section 12.02 of the Basic Agreement
shall be deemed amended and restated in its entirety to read as set forth in Part G of Exhibit C. 
 Section 8.02 Supplemental
Agreements Without Consent of Class A Certificateholders. Without limitation of Section 9.01 of the Basic Agreement (for the avoidance of doubt, as amended by Section 8.01 above), under the terms of, and subject to the limitations
contained in, such Section 9.01 of the Basic Agreement, the Company may (but will not be required to), and the Trustee (subject to Section 9.03 of the Basic Agreement) shall, at the Company’s request, at any time and from time to
time, enter into (or, in the case of the Deposit Agreement, consent to) and, if applicable, request the Escrow Agent and Escrow Paying Agent to enter into (i) one or more agreements supplemental to the Escrow Agreement, the NPA or the Deposit
Agreement, for any of the purposes set forth in clauses (1) through (9) of such Section 9.01, and (without limitation of the foregoing or Section 9.01 of the Basic Agreement) (a) clauses (2) and (3) of such
Section 9.01 shall also be deemed to include the Company’s obligations under (in the case of clause (2)), and the Company’s rights and powers 

  

					
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conferred by (in the case of clause (3)), the NPA and any Participation Agreement, (b) references in clauses (4) and (6) of such Section 9.01 to “any
Intercreditor Agreement or any Liquidity Facility” shall also be deemed to refer to “the Intercreditor Agreement, the Class A Liquidity Facility, the Escrow Agreement, the NPA, any Participation Agreement or the Deposit
Agreement”, and (c) references to “any Intercreditor Agreement or any Liquidity Facility” in clause (7) of such Section 9.01 shall also be deemed to refer to “the Intercreditor Agreement, the NPA, any Indenture,
the Class A Liquidity Facility, the Escrow Agreement, the Deposit Agreement or any Participation Agreement”, (ii) one or more agreements supplemental to any Operative Agreement, the NPA, the Escrow Agreement or the Deposit Agreement
to provide for the formation of one or more Additional Trusts, the issuance of one or more Classes of Additional Certificates, the purchase by any Additional Trust of applicable Additional Equipment Notes and other matters incidental thereto or as
otherwise contemplated by Section 2.01(b) of the Basic Agreement, all as provided in Section 4(a)(v) of the NPA and Section 8.01(d) of the Intercreditor Agreement, and (iii) one or more agreements supplemental to any Operative
Agreement, the NPA, the Escrow Agreement or the Deposit Agreement to provide for the formation of one or more Refinancing Trusts, the issuance of one or more Classes of Refinancing Certificates, the purchase by any Refinancing Trust of applicable
Refinancing Equipment Notes and other matters incidental thereto or as otherwise contemplated by Section 2.01(b) of the Basic Agreement, all as provided in Section 4(a)(v) of the NPA and Section 8.01(c) of the Intercreditor Agreement.
In addition, the following provisions of Section 9.01 of the Basic Agreement shall be amended, with respect to the Class A Trust, as follows: (A) Section 9.01(5) of the Basic Agreement shall be amended by inserting the phrase
“(or to facilitate any listing of any Certificates on any exchange or quotation system) or any requirement of DTC or like depositary,” after the phrase “any exchange or quotation system on which the Certificates of any series are
listed” but before the phrase “or of any regulatory body”; (B) Section 9.01(6) of the Basic Agreement shall be amended by inserting the phrase “to establish or” after the phrase “to such extent as shall be
necessary” but before the phrase “to continue”; and (C) Section 9.01(7) of the Basic Agreement shall be amended by replacing the phrase “and to add to or change” with the phrase “, or to evidence the
substitution of a Liquidity Provider with a Replacement Liquidity Provider or to provide for a Replacement Liquidity Facility, all as provided in any Intercreditor Agreement; or to evidence the substitution of a Depositary with a Replacement
Depositary or to provide for a Replacement Deposit Agreement, all as provided in the NPA; or to evidence and provide for the acceptance of appointment by a successor Escrow Agent or successor Escrow Paying Agent under the Escrow Agreement; or to
provide multiple Liquidity Facilities with respect to one or more Trusts; or to add to or change”. 
 Section 8.03 Supplemental
Agreements with Consent of Class A Certificateholders. Without limitation of Section 9.02 of the Basic Agreement, the provisions of Section 9.02 of the Basic Agreement shall apply to agreements or amendments for the purpose of
adding any provisions to or changing in any manner or eliminating any of the provisions of the Escrow Agreement, the Deposit Agreement, the Class A Liquidity Facility or the NPA or modifying in any manner the rights and obligations of the
Class A Certificateholders under the Escrow Agreement, the Deposit Agreement, the Class A Liquidity Facility or the NPA; provided that the provisions of Section 9.02(1) of the Basic Agreement shall be deemed to include reductions in
any manner of, or delay in the timing of, any receipt by the Class A Certificateholders of payments upon the Deposits. 

Section 8.04 Consent of Trustees for Amendment of Section 6.01. Notwithstanding any provision in Section 8.02 or
Section 8.03 of this Trust Supplement to the contrary, no amendment or modification of Section 6.01 of this Trust Supplement shall be effective unless the trustee for each Class of Certificates affected by such amendment or modification
shall have consented thereto. 

  

					
		  	20	  	Trust Supplement No. 2015-1A
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 ARTICLE IX 

MISCELLANEOUS PROVISIONS 

Section 9.01 Final Termination Date. The respective obligations and responsibilities of the Company and the Trustee created hereby
and the Class A Trust created hereby shall terminate upon the distribution to all Class A Certificateholders and the Trustee of all amounts required to be distributed to them pursuant to this Agreement and the disposition of all property
held as part of the Trust Property; provided, however, that in no event shall the Trust created hereby continue beyond the expiration of 21 years from the death of the last survivor of the descendants of Joseph P. Kennedy, Sr., the father of John F.
Kennedy, former President of the United States, living on the date of this Trust Supplement. 
 Notice of any termination of the
Class A Trust, specifying the applicable Regular Distribution Date (or applicable Special Distribution Date, as the case may be) upon which the Class A Certificateholders may surrender their Class A Certificates to the Trustee for
payment of the final distribution and cancellation, shall be mailed promptly by the Trustee to the Class A Certificateholders not earlier than 60 days and not later than 15 days preceding such final distribution. 

Section 9.02 Basic Agreement Ratified. Except and so far as herein expressly provided, all of the provisions, terms and conditions
of the Basic Agreement are in all respects ratified and confirmed; and the Basic Agreement and this Trust Supplement shall be taken, read and construed as one and the same instrument. To the extent that any provisions of the Basic Agreement are
superseded by any provisions of this Trust Supplement, any reference to such provisions of the Basic Agreement herein or in the Basic Agreement shall be deemed to be to such provisions of this Trust Supplement. 

Section 9.03 Governing Law. THIS AGREEMENT HAS BEEN DELIVERED IN THE STATE OF NEW YORK AND THIS AGREEMENT AND THE CLASS A
CERTIFICATES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK, INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE. 

Section 9.04 Counterparts. This Trust Supplement may be executed in any number of counterparts (and each of the parties shall
not be required to execute the same counterpart). Each counterpart of this Trust Supplement including a signature page or pages executed by each of the parties hereto shall be an original counterpart of this Trust Supplement, but all of such
counterparts together shall constitute one instrument. 
 Section 9.05 Intention of Parties. The parties hereto intend that the
Class A Trust be classified for United States federal income tax purposes as a grantor trust under Subpart E, Part I, Subchapter J, Chapter 1 of Subtitle A of the Code, and not as a trust or association taxable as a corporation or as
a partnership. Each Certificateholder of, and each Person acquiring a beneficial interest in, a Class A Certificate, by its acceptance of its Class A Certificate or a beneficial interest therein, agrees to treat the Class A Trust as a
grantor trust for all United States federal, state and local income tax purposes. The Trustee shall not be authorized or empowered to do anything that would cause the Class A Trust to fail to qualify as a grantor trust for such tax purposes
(including as subject to this restriction, acquiring any Aircraft by bidding the Equipment Notes relating thereto or otherwise, or taking any action with respect to any such Aircraft once acquired). 

Section 9.06 Submission to Jurisdiction. Each of the parties hereto, to the extent it may do so under applicable law, for purposes
hereof and of all other Operative Agreements hereby (i) irrevocably submits itself to the non-exclusive jurisdiction of the courts of the State of New York sitting in the City of New York and to the non-exclusive jurisdiction of the United
States District Court for the Southern District of New York, for the purposes of any suit, action or other proceeding arising out of this 

  

					
		  	21	  	Trust Supplement No. 2015-1A
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Agreement, the subject matter hereof or any of the transactions contemplated hereby brought by any party or parties hereto or thereto, or their successors or permitted assigns and
(ii) waives, and agrees not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or
proceeding is improper or that this Agreement or the subject matter hereof or any of the transactions contemplated hereby may not be enforced in or by such courts. 

Section 9.07 Successor and Assigns. All covenants, agreements, representations and warranties in this Agreement by the Trustee and
the Company shall bind and, to the extent permitted hereby, shall inure to the benefit of and be enforceable by their respective successors and assigns, whether so expressed or not. Any request, notice, direction, consent, waiver or other instrument
or action by any Class A Certificateholder shall bind the successors and assigns of such Class A Certificateholder. 

Section 9.08 Normal Commercial Relations. Anything contained in this Agreement to the contrary notwithstanding, the Trustee and
any Class A Certificateholder, or any bank or other affiliate of any such party, may conduct any banking or other financial transactions, and have banking and other commercial relationships, with the Company fully to the same extent as if this
Agreement were not in effect, including without limitation the making of loans or other extensions of credit to the Company for any purpose whatsoever, whether related to any of the transactions contemplated hereby or otherwise. 

Section 9.09 No Recourse against Others. No past, present or future director, officer, employee, agent, member, manager, trustee
or stockholder, as such, of the Company or any successor Person shall have any liability for any obligations of the Company or any successor Person, either directly or through the Company or any successor Person, under the Class A Certificates
or this Agreement or for any claim based on, in respect of or by reason of such obligations or their creation, whether by virtue of any rule of law, statute or constitutional provision of by the enforcement of any assessment or by any legal or
equitable proceeding or otherwise. By accepting a Class A Certificate, each Class A Certificateholder agrees to the provisions of this Section 9.09 and waives and releases all such liability. Such waiver and release shall be part of
the consideration for the issue of the Class A Certificates. 
 [Remainder of Page Intentionally Blank; Signature Pages
Follow] 

  

					
		  	22	  	Trust Supplement No. 2015-1A
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 IN WITNESS WHEREOF, the parties have caused this Trust Supplement to be duly executed by their
respective officers thereto duly authorized as of the date first written above. 
  

			
	SPIRIT AIRLINES, INC.
		
	By:	 	 /s/ Edward Christie

		 	Name: Edward Christie
		 	 Title: Senior Vice President and

          Chief Financial Officer

  
 Signature Page 

  
 Trust Supplement No.
2015-1A 
 (Spirit 2015-1 EETC) 

 
			
	WILMINGTON TRUST, NATIONAL ASSOCIATION,
	as Trustee
		
	By:	 	 /s/ Scott Wetzel

		 	Name: Scott Wetzel
		 	Title: Financial Services Officer

  
 Signature Page 

  
 Trust Supplement No.
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 EXHIBIT A to 

TRUST SUPPLEMENT NO. 2015-1A 

FORM OF CERTIFICATE 

[UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION
(“DTC”), TO THE TRUSTEE OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IN EXCHANGE FOR THIS CERTIFICATE IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY
AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY
PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]* 
 BY ITS ACQUISITION HEREOF, THE
HOLDER REPRESENTS THAT EITHER (A) NO ASSETS OF A PLAN OR ANY TRUST ESTABLISHED WITH RESPECT TO A PLAN HAVE BEEN USED TO PURCHASE OR HOLD THIS CERTIFICATE OR AN INTEREST HEREIN OR (B) THE PURCHASE AND HOLDING OF THIS CERTIFICATE OR INTEREST
HEREIN BY SUCH A PERSON ARE EXEMPT FROM THE PROHIBITED TRANSACTION RESTRICTIONS OF ERISA AND THE CODE OR PROVISIONS OF SIMILAR LAW PURSUANT TO ONE OR MORE PROHIBITED TRANSACTION STATUTORY OR ADMINISTRATIVE EXEMPTIONS OR SIMILAR EXEMPTIONS UNDER
SIMILAR LAW. CERTAIN TERMS USED IN THIS PARAGRAPH SHALL HAVE THE MEANINGS SPECIFIED IN THE AGREEMENT. 
  

	*	This legend to appear on Book-Entry Certificates to be deposited with The Depositary Trust Company. 

  
 Trust Supplement No.
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 [GLOBAL CERTIFICATE]† 

SPIRIT AIRLINES PASS THROUGH TRUST 2015-1A 

SPIRIT AIRLINES PASS THROUGH CERTIFICATE, SERIES 2015-1A 

Final Expected Regular Distribution Date: April 1, 2028 

evidencing a fractional undivided interest in the Trust, the property of which includes or will include, among other things, certain Equipment
Notes each secured by an Aircraft owned by Spirit Airlines, Inc. 
  

					
	Certificate No.     	  	$         Fractional Undivided Interest representing 0.0002194801831342648% of the Trust per $1,000 face amount	  	 CUSIP No. 84858D AA6
 ISIN No.
US84858DAA63

 THIS CERTIFIES THAT             , for value
received, is the registered owner of a $         (         dollars) Fractional Undivided Interest (or such lesser amounts as shall be the aggregate outstanding
face amount hereof as set forth in the records of the Trustee) in the Spirit Airlines Pass Through Trust, Series 2015-1A (the “Trust”) created by WILMINGTON TRUST, NATIONAL ASSOCIATION, as trustee (together with any successor in
interest and any successor or other trustee appointed pursuant to the Trust Supplement referred to below, the “Trustee”) under a Pass Through Trust Agreement, dated as of August 11, 2015 (the “Basic Agreement”), between
Wilmington Trust, National Association and Spirit Airlines, Inc., a Delaware corporation (together with any successor in interest pursuant to Section 5.02 of the Basic Agreement, the “Company”), as supplemented by Trust Supplement
No. 2015-1A thereto dated as of August 11, 2015 (collectively, and as may be amended from time to time, the “Agreement”), between the Trustee and the Company, a summary of certain of the pertinent provisions of which is set forth
below. To the extent not otherwise defined herein, the capitalized terms used herein have the meanings assigned to them in the Agreement. This Certificate is one of the duly authorized Certificates designated as “Spirit Airlines Pass Through
Certificates, Series 2015-1A” (herein called the “Certificates”). This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement. By virtue of its acceptance hereof, the Certificateholder
of this Certificate assents to and agrees to be bound by all of the provisions of the Agreement and the Intercreditor Agreement, including the subordination provisions of Section 9.09 of the Intercreditor Agreement. The Trust Property is
expected to include certain Equipment Notes and includes all rights of the Trust and the Trustee, on behalf of the Trust, to receive any payments under the Intercreditor Agreement and the Class A Liquidity Facility. Each issue of the Equipment
Notes will be secured by, among other things, a security interest in the Aircraft owned by the Company. 
 The Certificates represent
Fractional Undivided Interests in the Trust and the Trust Property, and will have no rights, benefits or interest in respect of any other separate trust established pursuant to the terms of the Basic Agreement for any other series of certificates
issued pursuant thereto. 
 Subject to and in accordance with the terms of the Agreement and the Intercreditor Agreement, from funds then
available to the Trustee, there will be distributed on each April 1 and October 1 (each, a “Regular Distribution Date”), commencing on April 1, 2016, to the Person in whose name this Certificate is registered at the close of
business on the 15th day preceding the Regular Distribution Date, an amount in respect of the Scheduled Payments on the Series A Equipment Notes due on such Regular Distribution Date, the receipt of which has been confirmed by the Trustee, equal to
the 
  

	†	To be included on the face of each Global Certificate. 

  
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product of the percentage interest in the Trust evidenced by this Certificate and an amount equal to the sum of such Scheduled Payments. Subject to and in accordance with the terms of the
Agreement and the Intercreditor Agreement, in the event that Special Payments on the Series A Equipment Notes are received by the Trustee, from funds then available to the Trustee, there shall be distributed on the applicable Special Distribution
Date, to the Person in whose name this Certificate is registered at the close of business on the 15th day preceding the applicable Special Distribution Date, an amount in respect of such Special Payments on the Series A Equipment Notes, the receipt
of which has been confirmed by the Trustee, equal to the product of the percentage interest in the Trust evidenced by this Certificate and an amount equal to the sum of such Special Payments so received. If a Regular Distribution Date or Special
Distribution Date is not a Business Day, distribution shall be made on the immediately following Business Day and no interest shall accrue during the intervening period. The Trustee shall mail notice of each Special Payment and the Special
Distribution Date therefor to the Certificateholder of this Certificate. 
 Distributions on this Certificate will be made by the Trustee by
check mailed to the Person entitled thereto, without the presentation or surrender of this Certificate or the making of any notation hereon, except that with respect to Certificates registered on the Record Date in the name of a Clearing Agency (or
its nominee), such distributions shall be made by wire transfer. Except as otherwise provided in the Agreement and notwithstanding the above, the final distribution on this Certificate will be made after notice mailed by the Trustee of the pendency
of such distribution and only upon presentation and surrender of this Certificate at the office or agency of the Trustee specified in such notice. 

The Certificates do not represent a direct obligation of, or an obligation guaranteed by, or an interest in, the Company, the Trustee, the
Subordination Agent, any Loan Trustee or any Affiliate of any thereof. The Certificates are limited in right of payment, all as more specifically set forth on the face hereof and in the Agreement. All payments or distributions made to
Certificateholders under the Agreement shall be made only from the Trust Property and only to the extent that the Trustee shall have sufficient income or proceeds from the Trust Property to make such payments in accordance with the terms of the
Agreement. Each Certificateholder of this Certificate, by its acceptance hereof, agrees that it will look solely to the income and proceeds from the Trust Property to the extent available for any payment or distribution to such Certificateholder
pursuant to the terms of the Agreement and that it will not have any recourse to the Company, the Trustee, the Loan Trustees or any Affiliate of any thereof except as otherwise expressly provided in the Agreement, in any Note Document or in the
Intercreditor Agreement. This Certificate does not purport to summarize the Agreement and reference is made to the Agreement for information with respect to the interests, rights, benefits, obligations, proceeds and duties evidenced hereby. A copy
of the Agreement may be examined during normal business hours at the principal office of the Trustee, and at such other places, if any, designated by the Trustee, by any Certificateholder upon request. 

The Agreement permits, with certain exceptions therein provided, the amendment thereof, and the modification of the rights and obligations of
the Company and the rights of the Certificateholders under the Agreement, at any time by the Company and the Trustee with the consent of the Certificateholders holding Certificates evidencing Fractional Undivided Interests aggregating not less than
a majority in interest in the Trust. Any such consent by the Certificateholder of this Certificate shall be conclusive and binding on such Certificateholder and upon all future Certificateholders of this Certificate and of any Certificate issued
upon the transfer hereof or in exchange hereof or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the
Certificateholders of any of the Certificates. 
 As provided in the Agreement and subject to certain limitations set forth therein, the
transfer of this Certificate is registrable in the Register upon surrender of this Certificate for registration 

  
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of transfer at the offices or agencies maintained by the Trustee in its capacity as Registrar, or by any successor Registrar, duly endorsed or accompanied by a written instrument of transfer in
form satisfactory to the Trustee and the Registrar, duly executed by the Certificateholder hereof or such Certificateholder’s attorney duly authorized in writing, and thereupon one or more new Certificates of authorized denominations evidencing
the same aggregate Fractional Undivided Interest in the Trust will be issued to the designated transferee or transferees. 
 The
Certificates are issuable only as registered Certificates without coupons in minimum denominations of $2,000 (or such other denomination that is the lowest integral multiple of $1,000 that is, at the time of issuance, equal to at least 1,000 euros)
Fractional Undivided Interest and integral multiples of $1,000 in excess thereof except that one Certificate may be issued in a different denomination. As provided in the Agreement and subject to certain limitations therein set forth, the
Certificates are exchangeable for new Certificates of authorized denominations evidencing the same aggregate Fractional Undivided Interest in the Trust, as requested by the Certificateholder surrendering the same. 

No service charge will be made for any such registration of transfer or exchange, but the Trustee shall require payment of a sum sufficient to
cover any tax or governmental charge payable in connection therewith. 
 The Company, the Trustee, the Registrar and any Paying Agent shall
deem and treat the Person in whose name this Certificate is registered as the owner hereof for all purposes, and none of the Company, the Trustee, the Registrar or any such agent shall be affected by any notice to the contrary. 

Each Certificateholder and Person with a beneficial interest herein, by its acceptance of this Certificate or such interest, agrees to treat
the Trust as a grantor trust for all U.S. federal, state and local income tax purposes. 
 The obligations and responsibilities created by
the Agreement and the Trust created thereby shall terminate upon the distribution to Certificateholders of all amounts required to be distributed to them pursuant to the Agreement and the disposition of all property held as part of the Trust
Property. 
 Any Person acquiring or accepting this Certificate or an interest herein will, by such acquisition or acceptance, be deemed to
(a) represent and warrant to the Company, the Loan Trustees and the Trustee that either: (i) no assets of a Plan or any trust established with respect to a Plan have been used to purchase or hold this Certificate or an interest herein or
(ii) the purchase and holding of this Certificate or interest herein by such Person are exempt from the prohibited transaction restrictions of ERISA and the Code or provisions of Similar Law pursuant to one or more prohibited transaction
statutory or administrative exemptions or similar exemptions under Similar Law and (b) direct the Trustee to invest the assets held in the Trust pursuant to, and take all other actions contemplated by, the terms and conditions of the Basic
Agreement, this Trust Supplement, the Intercreditor Agreement, the Deposit Agreement, the Escrow Agreement, the NPA, and each Participation Agreement. 

THIS CERTIFICATE AND THE AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK, INCLUDING ALL
MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE. 
 Unless the certificate of authentication hereon has been executed by the Trustee,
by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose. 

  
 Trust Supplement No.
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 IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly executed. 

 

			
	SPIRIT AIRLINES PASS THROUGH TRUST
	2015-1A
		
	By:	 	WILMINGTON TRUST, NATIONAL ASSOCIATION,
		 	as Trustee
		
	By:	 	  

		 	Title:

 Dated: 

  
 Trust Supplement No.
2015-1A 
 (Spirit 2015-1 EETC) 

 TRUSTEE’S CERTIFICATE OF AUTHENTICATION 

This is one of the Certificates referred to in the within-mentioned Agreement. 

 

			
	WILMINGTON TRUST, NATIONAL ASSOCIATION,
	as Trustee
		
	By:	 	  

		 	Authorized Officer

  
 Trust Supplement No.
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 (Spirit 2015-1 EETC) 

 [FORM OF TRANSFER NOTICE] 

FOR VALUE RECEIVED the undersigned registered holder hereby sell(s), assign(s) and transfer(s) unto 

Insert Taxpayer Identification No. 
  

                       
                                  

Please print or typewrite name and address including zip code of assignee 
  

                       
                                  

the within Certificate and all rights thereunder, hereby irrevocably constituting and appointing
                     attorney to transfer said Certificate on the books of the Trustee with full power of substitution in the premises. 

 

									
	Date:	 	  
	 		 	  

		 		 		 	NOTICE: The signature to this assignment must correspond with the name as written upon the face of the within-mentioned instrument in every particular, without alteration or any change
whatsoever.

									
					
		 		 		 	SIGNATURE GUARANTEE:	 	  

 Signatures must be guaranteed by an “eligible guarantor institution” meeting the requirements of the
Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program (“STAMP”) or such other “signature guarantee program” as may be determined by the Registrar in addition to, or in
substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended. 

  
 Trust Supplement No.
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 EXHIBIT B to 

TRUST SUPPLEMENT NO. 2015-1A 

DTC LETTER OF REPRESENTATIONS 

  
 Trust Supplement No.
2015-1A 
 (Spirit 2015-1 EETC) 

 EXHIBIT C to 

TRUST SUPPLEMENT NO. 2015-1A 

AMENDMENTS TO BASIC AGREEMENT 
 Part A

 Section 5.02. Consolidation, Merger, Etc. The Company shall not consolidate with or merge into any other
Person or convey, transfer or lease substantially all of its assets as an entirety to any Person, unless: 
 (i) the
successor or transferee entity shall, if and to the extent required under Section 1110 in order that any Loan Trustee continues to be entitled to any benefits of Section 1110 with respect to any Aircraft, be a holder of an air carrier
operating certificate issued by the Secretary of Transportation pursuant to Chapter 447 of Title 49 of the United States Code for aircraft capable of carrying ten or more individuals or 6,000 pounds or more of cargo, and shall execute and deliver to
the Trustee an agreement containing the express assumption by such successor or transferee entity of the due and punctual performance and observance of each covenant and condition of the Note Documents, the NPA and this Agreement to be performed or
observed by the Company; and 
 (ii) the Company shall deliver to the Trustee a certificate signed by a Responsible Officer
of the Company stating that such consolidation, merger, conveyance, transfer or lease and the assumption agreement mentioned in clause (i) above comply with this Section 5.02. 

Upon any consolidation or merger, or any conveyance, transfer or lease of substantially all of the assets of the Company as an
entirety in accordance with this Section 5.02, the successor Person formed by such consolidation or into which the Company is merged or to which such conveyance, transfer or lease is made shall succeed to, and be substituted for, and may
exercise every right and power of, the Company under the Note Documents, the NPA and this Agreement with the same effect as if such successor Person had been named as the Company herein. 

Part B 
 Section 6.07.
Certificateholders May Not Bring Suit Except Under Certain Conditions. A Certificateholder of any series shall not have the right to institute any suit, action or proceeding at law or in equity or otherwise with respect to this Agreement, the
related Trust Supplement or the Certificates or otherwise, or for the appointment of a receiver or for the enforcement of any other remedy under this Agreement, the related Trust Supplement or the Certificates or otherwise, unless: 

 

	 	(1)	such Certificateholder previously shall have given written notice to the Trustee of a continuing Event of Default; 

  

	 	(2)	Certificateholders holding Certificates of such series evidencing Fractional Undivided Interests aggregating not less than 25% of the related Trust shall have requested the Trustee in writing to institute such action,
suit or proceeding and shall have offered to the Trustee indemnity as provided in Section 7.03(e); 

  

	 	(3)	the Trustee shall have refused or neglected to institute any such action, suit or proceeding for 60 days after receipt of such notice, request and offer of indemnity; and 

 

	 	(4)	no Direction inconsistent with such written request shall have been given to the Trustee during such 60-day period by either Certificateholders holding Certificates of such series evidencing Fractional Undivided
Interests aggregating not less than a majority in interest in the related Trust or the Controlling Party under the related Intercreditor Agreement. 

  
 Trust Supplement No.
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 Except to the extent provided in any applicable Intercreditor Agreement or in any
applicable Trust Supplement, it is understood and intended that no one or more of the Certificateholders of any series shall have any right in any manner whatsoever hereunder or under the related Trust Supplement or under the Certificates of such
series to (i) surrender, impair, waive, affect, disturb or prejudice any property in the Trust Property of the related Trust, or the lien of any related Indenture on any property subject thereto, or the rights of the Certificateholders of such
series or the holders of the related Equipment Notes, (ii) obtain or seek to obtain priority over or preference with respect to any other such Certificateholder of such series or (iii) enforce any right under this Agreement, the related
Trust Supplement or under the Certificates of such series, except in the manner provided in this Agreement and for the equal, ratable and common benefit of all the Certificateholders of such series. 

Part C 
 Provided that
there is a bank or trust company in a U.S. jurisdiction where there are no Avoidable Taxes that is willing to act as Trustee and is eligible to act as Trustee under Section 7.08 and the applicable provisions of any Trust Supplement, the Company
shall promptly appoint a successor Trustee of such Trust in a jurisdiction where there are no Avoidable Taxes. 
 Part D 

(a) file with the Trustee, within 30 days after the Company files the same with the SEC, copies of the annual reports and of
the information, documents and other reports (or copies of such portions of any of the foregoing as the SEC may from time to time by rules and regulations prescribe) which the Company is required to file with the SEC pursuant to Section 13 or
Section 15(d) of the Securities Exchange Act of 1934, as amended; or, if the Company is not required to file information, documents or reports pursuant to either of such sections, then to file with the Trustee and the SEC, in accordance with
rules and regulations prescribed by the SEC, such supplementary and periodic information, documents and reports which may be required pursuant to Section 13 of the Securities Exchange Act of 1934, as amended, in respect of a security listed and
registered on a national securities exchange as may be prescribed in such rules and regulations; 
 Part E 

(4) (A) to cure any ambiguity or to correct any mistake or inconsistency contained in this Basic Agreement or in any related
Trust Supplement, any Intercreditor Agreement or any Liquidity Facility; or (B) to make or modify any other provision in regard to matters or questions arising under this Basic Agreement or any related Trust Supplement, any Intercreditor
Agreement or any Liquidity Facility as the Company may deem necessary or desirable and that will not materially adversely affect the interests of the related Certificateholders; or (C) to correct or supplement the description of any property
constituting property of any Trust or the description of any Aircraft, and to reflect the substitution of another aircraft for any Aircraft; or 

  
 Trust Supplement No.
2015-1A 
 (Spirit 2015-1 EETC) 

 Part F 

Section 12.01. Limitation on Rights of Certificateholders. (a) The insolvency, death or incapacity of any
Certificateholder of any series shall not operate to terminate this Agreement or the related Trust, nor entitle such Certificateholder’s legal representative or heirs to claim an accounting or to take any action or commence any proceeding in
any court for a partition or winding up of the Trust, nor otherwise affect the rights, obligations and liabilities of the parties hereto or any of them. No Certificateholder of any series shall be entitled to revoke the related Trust. 

(b) No transfer, by operation of law or otherwise, of any Certificate or other right, title and interest of any
Certificateholder in and to the applicable Trust Property or under the related Trust shall operate to terminate the Trust or entitle such Certificateholder or any successor or transferee of such Certificateholder to an accounting or to the transfer
to it of legal title to any part of such Trust Property. 
 Part G 

Section 12.02. Liabilities of Certificateholders. The Certificateholders of each series shall not be personally
liable for obligations of the related Trust, the Fractional Undivided Interests represented by the Certificates of such series shall be nonassessable for any losses or expenses of such Trust or for any reason whatsoever, and the Certificates of such
series upon authentication thereof by the Trustee pursuant to Section 3.02 are and shall be deemed fully paid. No Certificateholder of such series shall have any right (except as expressly provided herein) to vote or in any manner otherwise
control the operation and management of the related Trust Property, the related Trust, or the obligations of the parties hereto, nor shall anything set forth herein, or contained in the terms of the Certificates of such series, be construed so as to
constitute the Certificateholders of such series from time to time as partners or members of an association. 

  
 Trust Supplement No.
2015-1A 
 (Spirit 2015-1 EETC) 

 SCHEDULE I to 

TRUST SUPPLEMENT NO. 2015-1A 

SERIES A EQUIPMENT NOTES, 

PRINCIPAL AMOUNTS, MATURITIES AND AIRCRAFT 
  

									
	Initial Principal
Amount of Series
A Equipment
Notes*	 	  	Maturity	  	Aircraft**	  	Manufacturer Serial
Number**
	$	27,150,000.00	  	  	April 1, 2028	  	N644NK	  	TBD
	 	26,840,000.00	  	  	April 1, 2028	  	N645NK	  	TBD
	 	26,527,000.00	  	  	April 1, 2028	  	N646NK	  	TBD
	 	32,080,000.00	  	  	April 1, 2028	  	N660NK	  	6804
	 	31,924,000.00	  	  	April 1, 2028	  	N661NK	  	6867
	 	31,768,000.00	  	  	April 1, 2028	  	N662NK	  	6897
	 	31,570,000.00	  	  	April 1, 2028	  	N663NK	  	TBD
	 	31,413,000.00	  	  	April 1, 2028	  	N664NK	  	TBD
	 	31,413,000.00	  	  	April 1, 2028	  	N665NK	  	TBD
	 	31,369,000.00	  	  	April 1, 2028	  	N667NK	  	TBD
	 	31,212,000.00	  	  	April 1, 2028	  	N668NK	  	TBD
	 	30,851,000.00	  	  	April 1, 2028	  	N669NK	  	TBD
	 	30,692,000.00	  	  	April 1, 2028	  	N670NK	  	TBD
	 	30,486,000.00	  	  	April 1, 2028	  	N671NK	  	TBD
	 	30,327,000.00	  	  	April 1, 2028	  	N672NK	  	TBD

  

	*	Subject to adjustment as provided in the NPA. 

	**	Subject to substitution as provided in the NPA. 

  
 Trust Supplement No.
2015-1A 
 (Spirit 2015-1 EETC) 

 SCHEDULE II to 

TRUST SUPPLEMENT NO. 2015-1A 

NOTE DOCUMENTS 

Participation Agreement 
 Indenture

 Manufacturer’s Consent (as defined in any applicable Indenture) 

For each of the aircraft listed in Schedule I. 

  
 Trust Supplement No.
2015-1A 
 (Spirit 2015-1 EETC)

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