EX-4.5


 Exhibit 4.5 

EXECUTION VERSION 
  

 
  

REVOLVING CREDIT AGREEMENT 
 (2017-1AA) 
 Dated as of November 28, 2017 

between 
 WILMINGTON TRUST,
NATIONAL ASSOCIATION, 
 as Subordination Agent, 

as agent and trustee for the trustee of 

Spirit Airlines Pass Through Trust 2017-1AA, 

as Borrower 
 and 

COMMONWEALTH BANK OF AUSTRALIA, NEW YORK BRANCH, 

as Liquidity Provider 
 Spirit
Airlines Pass Through Trust 2017-1AA 
 Spirit Airlines 

Pass Through Certificates, 
 Series 2017-1AA 
  
  

 

  

					
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 Table of Contents 

 

							
	 	 	 	  	Page	 
		
	 ARTICLE I DEFINITIONS
	  	 	1	 
			
	 Section 1.01
	 	Definitions	  	 	1	 
		
	 ARTICLE II AMOUNT AND TERMS OF THE COMMITMENT
	  	 	11	 
			
	 Section 2.01
	 	The Advances	  	 	11	 
			
	 Section 2.02
	 	Making of Advances	  	 	11	 
			
	 Section 2.03
	 	Fees	  	 	13	 
			
	 Section 2.04
	 	Reduction or Termination of the Maximum Commitment	  	 	13	 
			
	 Section 2.05
	 	Repayments of Interest Advances, the Special Termination Advance or the Final Advance	  	 	14	 
			
	 Section 2.06
	 	Repayments of Provider Advances	  	 	15	 
			
	 Section 2.07
	 	Payments to the Liquidity Provider Under the Intercreditor Agreement	  	 	16	 
			
	 Section 2.08
	 	Book Entries	  	 	16	 
			
	 Section 2.09
	 	Payments from Available Funds Only	  	 	16	 
			
	 Section 2.10
	 	Extension of the Expiry Date; Non-Extension Advance	  	 	17	 
		
	 ARTICLE III OBLIGATIONS OF THE BORROWER
	  	 	17	 
			
	 Section 3.01
	 	Increased Costs	  	 	17	 
			
	 Section 3.02
	 	Reserved	  	 	19	 
			
	 Section 3.03
	 	Withholding Taxes	  	 	19	 
			
	 Section 3.04
	 	Payments	  	 	21	 
			
	 Section 3.05
	 	Computations	  	 	21	 
			
	 Section 3.06
	 	Payment on Non-Business Days	  	 	21	 


  

					
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	 Section 3.07
	 	Interest	  	 	21	 
			
	 Section 3.08
	 	Replacement of Borrower	  	 	23	 
			
	 Section 3.09
	 	Funding Loss Indemnification	  	 	23	 
			
	 Section 3.10
	 	Illegality	  	 	24	 
		
	 ARTICLE IV CONDITIONS PRECEDENT
	  	 	24	 
			
	 Section 4.01
	 	Conditions Precedent to Effectiveness of Section 2.01	  	 	24	 
			
	 Section 4.02
	 	Conditions Precedent to Borrowing	  	 	26	 
		
	 ARTICLE V COVENANTS
	  	 	26	 
			
	 Section 5.01
	 	Affirmative Covenants of the Borrower	  	 	26	 
			
	 Section 5.02
	 	Negative Covenants of the Borrower	  	 	27	 
		
	 ARTICLE VI LIQUIDITY EVENTS OF DEFAULT AND SPECIAL TERMINATION
	  	 	27	 
			
	 Section 6.01
	 	Liquidity Events of Default	  	 	27	 
		
	 ARTICLE VII MISCELLANEOUS
	  	 	28	 
			
	 Section 7.01
	 	No Oral Modifications or Continuing Waivers	  	 	28	 
			
	 Section 7.02
	 	Notices	  	 	28	 
			
	 Section 7.03
	 	No Waiver; Remedies	  	 	29	 
			
	 Section 7.04
	 	Further Assurances	  	 	29	 
			
	 Section 7.05
	 	Indemnification; Survival of Certain Provisions	  	 	29	 
			
	 Section 7.06
	 	Liability of the Liquidity Provider	  	 	30	 
			
	 Section 7.07
	 	Certain Costs and Expenses	  	 	30	 
			
	 Section 7.08
	 	Binding Effect; Participations	  	 	31	 
			
	 Section 7.09
	 	Severability	  	 	33	 
			
	 Section 7.10
	 	Governing Law	  	 	33	 


  

					
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	 Section 7.11
	 	Submission to Jurisdiction; Waiver of Jury Trial; Waiver of Immunity	  	33
			
	 Section 7.12
	 	Counterparts	  	34
			
	 Section 7.13
	 	Entirety	  	34
			
	 Section 7.14
	 	Headings	  	34
			
	 Section 7.15
	 	Liquidity Provider’s Obligation to Make Advances	  	34
			
	 Section 7.16
	 	Head Office Obligations	  	34

  

			
	Annex I	  	- Form of Interest Advance Notice of Borrowing
	Annex II	  	- Form of Non-Extension Advance Notice of Borrowing
	Annex III	  	- Form of Downgrade Advance Notice of Borrowing
	Annex IV	  	- Form of Final Advance Notice of Borrowing
	Annex V	  	- Form of Special Termination Advance Notice of Borrowing
	Annex VI	  	- Form of Notice of Termination
	Annex VII	  	- Form of Notice of Special Termination
	Annex VIII	  	- Form of Notice of Replacement Subordination Agent


  

					
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 REVOLVING CREDIT AGREEMENT 

(2017-1AA) 

This REVOLVING CREDIT AGREEMENT (2017-1AA), dated as of November 28, 2017, is made by and between
WILMINGTON TRUST, NATIONAL ASSOCIATION, a national banking association, not in its individual capacity but solely as Subordination Agent (such term and other capitalized terms used herein without definition being defined as provided in Article I)
under the Intercreditor Agreement (as defined below), as agent and trustee for the Class AA Trustee (in such capacity, together with its successors in such capacity, the “Borrower”), and COMMONWEALTH BANK OF AUSTRALIA,
NEW YORK BRANCH, an Australian corporation acting through its New York Branch (the “Liquidity Provider”). 
 W
I T N E S S E T H: 
 WHEREAS, pursuant to the Class AA Trust Agreement,
the Class AA Trust is issuing the Class AA Certificates; and 
 WHEREAS, the Borrower, in order to support the timely payment of a
portion of the interest on the Class AA Certificates in accordance with their terms, has requested the Liquidity Provider to enter into this Agreement, providing in part for the Borrower to request in specified circumstances that Advances be
made hereunder; 
 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. (a) The definitions stated herein apply equally to both the singular and the plural forms of the terms defined. 

(b) All references in this Agreement to designated “Articles”, “Sections”, “Annexes” and other subdivisions are
to the designated Article, Section, Annex or other subdivision of this Agreement, unless otherwise specifically stated. 

  

					
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 (c) The words “herein”, “hereof” and “hereunder” and other words of
similar import refer to this Agreement as a whole and not to any particular Article, Section, Annex or other subdivision. 
 (d) Unless the
context otherwise requires, whenever the words “including”, “include” or “includes” are used herein, it shall be deemed to be followed by the phrase “without limitation”. 

(e) All references in this Agreement to a Person shall include successors and permitted assigns of such Person. 

(f) For the purposes of this Agreement, unless the context otherwise requires, the following capitalized terms shall have the following
meanings: 
 “Advance” means an Interest Advance, a Final Advance, a Provider Advance, an Unapplied Provider
Advance, an Applied Provider Advance, a Special Termination Advance, an Unapplied Special Termination Advance, an Applied Special Termination Advance or an Unpaid Advance, as the case may be. 

“Agreement” means this Agreement, as the same may be amended, supplemented or otherwise modified from time to time in
accordance with its terms. 
 “Applicable Liquidity Rate” has the meaning specified in Section 3.07(h). 

“Applicable Margin” means (a) with respect to any Interest Advance, Final Advance, Applied Provider Advance or
Applied Special Termination Advance, 3.25% per annum, (b) with respect to any Unapplied Provider Advance, the rate per annum specified in the Fee Letter or (c) with respect to any Unapplied Special Termination Advance, the rate per annum
specified in the Fee Letter. 
 “Applied Downgrade Advance” has the meaning specified in Section 2.06(a). 

“Applied Non-Extension Advance” has the meaning specified in
Section 2.06(a). 
 “Applied Provider Advance” means an Applied Downgrade Advance or an Applied Non-Extension Advance. 

  

					
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 “Applied Special Termination Advance” has the meaning specified in
Section 2.05. 
 “Base Rate” means a fluctuating interest rate per annum in effect from time to time, which
rate per annum shall at all times be equal to the sum of (a) the weighted average of the rates on overnight Federal funds transactions with members of the Federal Reserve System arranged by Federal funds brokers, as published for each day in
the period for which the Base Rate is to be determined (or, if such day is not a Business Day, for the preceding Business Day) by the Federal Reserve Bank of New York, or if such rate is not so published for any day that is a Business Day, the
average of the quotations for such day for such transactions received by the Liquidity Provider from three Federal funds brokers of recognized standing selected by it (and reasonably satisfactory to Spirit) plus
(b) one-quarter of one percent (0.25%). 
 “Base Rate Advance” means an
Advance that bears interest at a rate based upon the Base Rate. 
 “Borrower” has the meaning specified in the
introductory paragraph to this Agreement. 
 “Borrowing” means the making of Advances requested by delivery of a
Notice of Borrowing. 
 “Business Day” means 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, Miramar, Florida, Wilmington, Delaware, or, so long as any Class AA Certificate is outstanding, the city and state in which the Class AA Trustee, the Borrower or any related
Loan Trustee maintains its Corporate Trust Office or receives or disburses funds, and, if the applicable Business Day relates to any Advance or other amount bearing interest based on the LIBOR Rate, on which dealings are carried on in the London
interbank market. 
 “Code” means the United States Internal Revenue Code of 1986, as amended. 

“Covered Taxes” means any Taxes imposed by the United States, or any political subdivision or taxing authority thereof
or therein, that are required by law to be deducted or withheld from any amounts payable to the Liquidity Provider under this Agreement other than (i) any such Tax on, based on or measured by net income, franchises or conduct of business,
(ii) any such Tax imposed, levied, withheld or assessed as a result of any connection between the Liquidity Provider and the United States or such political subdivision or taxing authority, other than a connection arising solely from the
Liquidity Provider’s having executed, delivered, performed its obligations or received a payment under, or enforced, any Operative Agreement, (iii) any such Tax attributable to the inaccuracy in or breach by the Liquidity Provider of any
of its representations, warranties or covenants contained in any Operative Agreement to which it is a party or the inaccuracy of any form, certificate or document furnished pursuant thereto, 

  

					
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(iv) any such withholding Taxes imposed by the United States, except to the extent such withholding Taxes are the result of a change in law after such Liquidity Provider became a Liquidity
Provider hereunder, (v) any withholding Taxes imposed by the United States which are imposed or increased as a result of the Liquidity Provider failing to deliver to the Borrower any form, certificate or document (which form, certificate or
document, in the good faith judgment of the Liquidity Provider, it is legally entitled to provide) which is reasonably requested by the Borrower to establish that payments under this Agreement are exempt from (or entitled to a reduced rate of) any
such withholding Tax, (vi) any such Taxes that would not have been imposed but for any change in the Lending Office without the prior written consent of Spirit (such consent not to be unreasonably withheld), or (vii) any Taxes imposed
under FATCA. 
 “Downgrade Advance” means an Advance made pursuant to Section 2.02(b)(ii). 

“Downgrade Event” means any downgrading of, or any suspension or withdrawal of any applicable rating of, the Liquidity
Provider by any Rating Agency such that after such downgrading, suspension or withdrawal the Liquidity Provider does not have the minimum Long-Term Rating specified for such Rating Agency in the definition of “Threshold Rating”. The
occurrence of a Downgrade Event shall be determined separately for each Rating Agency. 
 “Effective Date” has the
meaning specified in Section 4.01. The delivery of the certificate of the Liquidity Provider contemplated by Section 4.01(e) shall be conclusive evidence that the Effective Date has occurred. 

“Excluded Taxes” means (a) Taxes imposed on the overall net income of the Liquidity Provider, (b) Taxes
imposed on the “effectively connected income” of its Lending Office, (c) Covered Taxes that are indemnified pursuant to Section 3.03 hereof, and (d) Taxes described in clauses (i) through (vii) in the definition of
“Covered Taxes”. 
 “Expenses” means liabilities, losses, damages, costs and expenses
(including, without limitation, reasonable fees and disbursements of legal counsel), provided that Expenses shall not include any Taxes other than sales, use and V.A.T. taxes imposed on fees and expenses payable pursuant to Section 7.07.

 “Expiry Date” means the earlier of (a) the anniversary date of the Closing Date immediately following the
date on which the Liquidity Provider has provided a Non-Extension Notice to the Borrower pursuant to Section 2.10 and (b) the 15th day after the
Final Legal Distribution Date of the Class AA Certificates. 
 “FATCA” means Sections 1471 through 1474 of the
Code as of the date of this Agreement (or any amended or successor provisions that are substantively comparable and not 

  

					
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materially more onerous to comply with); any current or future regulations or official interpretations thereof; any agreements entered into pursuant to Section 1471(b)(1) of the Code; any
intergovernmental agreement entered into in connection with any of the foregoing; and any fiscal or regulatory legislation, rules or practices adopted pursuant to any such intergovernmental agreement. 

“Final Advance” means an Advance made pursuant to Section 2.02(c). 

“Head Office” has the meaning specified in Section 7.16. 

“Increased Cost” has the meaning specified in Section 3.01. 

“Intercreditor Agreement” means the Intercreditor Agreement, dated as of the date hereof, among the Trustees, the
Liquidity Provider, the liquidity provider under each Liquidity Facility (other than this Agreement), and the Subordination Agent, as the same may be amended, supplemented or otherwise modified from time to time in accordance with its terms. 

“Interest Advance” means an Advance made pursuant to Section 2.02(a). 

“Interest Period” means, with respect to any LIBOR Advance, each of the following periods: 

(i) the period beginning on the third Business Day following either (A) the Liquidity Provider’s receipt of the
Notice of Borrowing for such LIBOR Advance or (B) the date of the withdrawal of funds from the Class AA Cash Collateral Account for the purpose of paying interest on the Class AA Certificates as contemplated by Section 2.06(a)
hereof and, in each case, ending on the next succeeding Regular Distribution Date; and 
 (ii) each subsequent period
commencing on the last day of the immediately preceding Interest Period and ending on the next succeeding Regular Distribution Date; 
 provided,
however, that if (x) the Final Advance shall have been made pursuant to Section 2.02(c) or (y) other outstanding Advances shall have been converted into the Final Advance pursuant to Section 6.01(a), then the Interest
Periods shall be successive periods of one month beginning on (A) the third Business Day following the Liquidity Provider’s receipt of the Notice of Borrowing for such Final Advance (in the case of clause (x) above) or (B) the
Regular Distribution Date following such conversion (in the case of clause (y) above). 

  

					
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 “Lending Office” means the lending office of the Liquidity Provider
through which it acts for purposes of this Agreement, which is presently located at 599 Lexington Avenue, New York, NY 10022, or such other lending office as the Liquidity Provider from time to time shall notify the Borrower as its lending office
hereunder; provided that the Liquidity Provider shall not change its Lending Office without the prior written consent of Spirit (such consent not to be unreasonably withheld). 

“LIBOR Advance” means an Advance bearing interest at a rate based upon the LIBOR Rate. 

“LIBOR Rate” means, with respect to any Interest Period, (a) the interest rate per annum equal to the London
Interbank Offered Rate per annum administered by ICE Benchmark Administration Limited (or any other successor person which takes over administration of that rate) for Dollar deposits, which rate is displayed on the Reuters Screen LIBOR01 (or such
other page or screen as may replace such Reuters Screen) at approximately 11:00 a.m. (London time) on the day that is two Business Days prior to the first day of such Interest Period, for a period comparable to such Interest Period, or
(b) if no such rate is available on such Reuters Screen (or otherwise as aforesaid), the interest rate per annum equal to the average (rounded up, if necessary, to the nearest 1/100th of 1%) of the rates per annum at which deposits in Dollars
are offered by the Reference Banks (or, if fewer than all of the Reference Banks are quoting a rate for deposits in Dollars for the applicable period and amount, such fewer number of Reference Banks) at approximately 11:00 a.m. (London time) on
the day that is two Business Days prior to the first day of such Interest Period to prime banks in the London interbank market for a period comparable to such Interest Period and in an amount approximately equal to the principal amount of the LIBOR
Advance to be outstanding during such Interest Period, or (c) if none of the Reference Banks is quoting a rate for deposits in Dollars in the London interbank market for such a period and amount, the interest rate per annum equal to the average
(rounded up, if necessary, to the nearest 1/100th of 1%) of the rates at which deposits in Dollars are offered by the principal New York offices of the Reference Banks (or, if fewer than all of the Reference Banks are quoting a rate for deposits in
Dollars in the New York interbank market for the applicable period and amount, such fewer number of Reference Banks) at approximately 11:00 a.m. (New York time) on the day that is two Business Days prior to the first day of such Interest Period
to prime banks in the New York interbank market for a period comparable to such Interest Period and in an amount approximately equal to the principal amount of the LIBOR Advance to be outstanding during such Interest Period, or (d) if none of
the principal New York offices of the Reference Banks is quoting a rate for deposits in Dollars in the New York interbank market for the applicable period and amount, the Base Rate; provided that, if the LIBOR Rate determined as provided
above with respect to any LIBOR Advance for any Interest Period would be less than zero per annum, the LIBOR Rate shall be deemed to be zero. 

“Liquidity Event of Default” means the occurrence of either (a) the Acceleration of all of the Equipment Notes
(provided that, with respect to the period prior to the Delivery Period 

  

					
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Termination Date, the aggregate principal balance of such Equipment Notes is in excess of $250 million) or (b) a Spirit Bankruptcy Event. 

“Liquidity Indemnitee” means the Liquidity Provider, its directors, officers, employees and agents, and its successors
and permitted assigns. 
 “Liquidity Provider” has the meaning specified in the introductory paragraph to this
Agreement. 
 “Maximum Available Commitment” means, subject to the proviso contained in the third sentence of
Section 2.02(a), at any time of determination, (a) the Maximum Commitment at such time less (b) the aggregate amount of each Interest Advance outstanding at such time; provided that, subject to Section 2.06(d), following a
Provider Advance, a Special Termination Advance or a Final Advance, the Maximum Available Commitment shall be zero. 
 “Maximum
Commitment” means $14,293,133, as the same may be reduced from time to time in accordance with Section 2.04(a). 

“Non-Extension Advance” means an Advance made pursuant to
Section 2.02(b)(i). 
 “Non-Extension Notice” has the meaning specified
in Section 2.10. 
 “Notice Date” has the meaning specified in Section 2.10. 

“Notice of Borrowing” has the meaning specified in Section 2.02(e). 

“Notice of Replacement Subordination Agent” has the meaning specified in Section 3.08. 

“Participation” has the meaning specified in Section 7.08(b). 

“Performing Note Deficiency” means any time that less than 65% of the then aggregate outstanding principal amount of
all Series AA Equipment Notes, Series A Equipment Notes and Series B Equipment Notes are Performing Equipment Notes. 

“Permitted Transferee” means any Person that: 

  

					
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 (a) is not a commercial air carrier, Spirit or any affiliate of Spirit; and 

(b) is any one of: 

(1) a commercial banking institution organized under the laws of the United States or any state thereof or the District of
Columbia; 
 (2) a commercial banking institution that (x) is organized under the laws of France, Germany, The
Netherlands, Switzerland or the United Kingdom, (y) is entitled on the date it acquires any Participation to a complete exemption from United States federal income taxes for all income derived by it from the transactions contemplated by the
Operative Agreements under an income tax treaty, as in effect on such date, between the United States and such jurisdiction of its organization and (z) is engaged in the active conduct of a banking business in such jurisdiction of its
organization, holds its Participation in connection with such banking business in such jurisdiction and is regulated as a commercial banking institution by the appropriate regulatory authorities in such jurisdiction; or 

(3) a commercial banking institution that (x) is organized under the laws of Canada, France, Germany, Ireland, Japan,
Luxembourg, The Netherlands, Sweden, Switzerland or the United Kingdom and (y) is entitled on the date it acquires any Participation to a complete exemption from withholding of United States federal income taxes for all income derived by it
from the transactions contemplated by the Operative Agreements under laws as in effect on such date by reason of such income being effectively connected with the conduct of a trade or business within the United States. 

“Prospectus Supplement” means the Prospectus Supplement, dated November 13, 2017, relating to the Class AA
Certificates, the Class A Certificates and the Class B Certificates, as such Prospectus Supplement may be amended or supplemented. 

“Provider Advance” means a Downgrade Advance or a Non-Extension Advance. 

“Rate Determination Notice” has the meaning specified in Section 3.07(g). 

“Reference Banks” means the principal London offices of: Commonwealth Bank of Australia; Deutsche Bank AG; and JP
Morgan Chase Bank, N.A.; and such other or additional banking institutions as may be designated from time to time by mutual agreement of Spirit and the Liquidity Provider. 

  

					
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 “Regulatory Change” means (x) the enactment, adoption or
promulgation, after the date of this Agreement, of any law or regulation by a United States federal or state government or by any government having jurisdiction over the Liquidity Provider, or any change, after the date of this Agreement, in any
such law or regulation, or in the interpretation thereof by any governmental authority, central bank or comparable agency of the United States or any government having jurisdiction over the Liquidity Provider charged with responsibility for the
administration or application thereof, that shall impose, modify or deem applicable, or (y) the compliance by the Liquidity Provider (or its Head Office) with any applicable direction or requirement (whether or not having the force of law) of
any central bank or competent governmental or other authority, after the date of this Agreement, with respect to: (a) any reserve, special deposit or similar requirement against extensions of credit or other assets of, or deposits with or other
liabilities of, the Liquidity Provider including, or by reason of, the Advances, or (b) any capital adequacy requirement requiring the maintenance by the Liquidity Provider of additional capital in respect of any Advances or the Liquidity
Provider’s obligation to make any such Advances, or (c) any requirement to maintain liquidity or liquid assets in respect of the Liquidity Provider’s obligation to make any such Advances, or (d) any Taxes (other than Excluded
Taxes) with respect to the amounts payable or paid hereunder to the Liquidity Provider or any change in the basis of taxation of any amounts payable hereunder to the Liquidity Provider (other than in respect of Excluded Taxes). 

“Replenishment Amount” has the meaning specified in Section 2.06(b). 

“Required Amount” means, for any day, the sum of the aggregate amount of interest, calculated at the rate per annum
equal to the Stated Interest Rate for the Class AA Certificates on the basis of a 360-day year comprised of twelve 30-day months, that would be distributable on the
Class AA Certificates on each of the three successive semiannual Regular Distribution Dates immediately following such day or, if such day is a Regular Distribution Date, on such day and the succeeding two semiannual Regular Distribution Dates,
in each case calculated on the basis of the Pool Balance of the Class AA Certificates on such day and without regard to expected future distributions of principal on the Class AA Certificates. 

“Special Termination Advance” means an Advance made pursuant to Section 2.02(d). 

“Special Termination Notice” means the Notice of Special Termination substantially in the form of
Annex VII to this Agreement. 
 “Termination Date” means the earliest to occur of the
following: (i) the Expiry Date; (ii) the date on which the Borrower delivers to the Liquidity Provider a certificate, signed by a Responsible Officer of the Borrower, certifying that all of the Class AA Certificates have been paid in
full (or provision has been made for such payment in accordance with the Intercreditor Agreement and the Class AA Trust Agreement) or are otherwise no longer entitled to the 

  

					
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benefits of this Agreement; (iii) the date on which the Borrower delivers to the Liquidity Provider a certificate, signed by a Responsible Officer of the Borrower, certifying that a
Replacement Liquidity Facility has been substituted for this Agreement in full pursuant to Section 3.05(e) of the Intercreditor Agreement; (iv) the fifth Business Day following the receipt by the Borrower of a Termination Notice or a
Special Termination Notice from the Liquidity Provider pursuant to Section 6.01(a) or 6.01(b), as applicable; and (v) the date on which no Advance is or may (including by reason of reinstatement as herein provided) become available for a
Borrowing hereunder. 
 “Termination Notice” means the Notice of Termination substantially in the form of Annex
VI to this Agreement. 
 “Unapplied Advance” has the meaning specified in Section 3.07(e). 

“Unapplied Downgrade Advance” means the portion of any Downgrade Advance that is not an Applied Downgrade Advance.

 “Unapplied Non-Extension Advance” means the portion of any Non-Extension Advance that is not an Applied Non-Extension Advance. 

“Unapplied Provider Advance” means the portion any Provider Advance that is not an Applied Provider Advance. 

“Unapplied Special Termination Advance” means the portion any Special Termination Advance that is not an Applied
Special Termination Advance. 
 “Unpaid Advance” has the meaning specified in Section 2.05. 

For the purposes of this Agreement, the following terms shall have the respective meanings specified in the Intercreditor Agreement: 

“Acceleration”, “Additional Certificates”, “Aircraft”, “Certificate”, “Class A
Certificates”, “Class AA Cash Collateral Account” “Class AA Certificates”, “Class AA Certificateholders”, “Class AA Trust”, “Class AA Trust Agreement”,
“Class AA Trustee”, “Class B Certificates”, “Closing Date”, “Collection Account”, “Corporate Trust Office”, “Delivery Period Termination Date”, “Distribution Date”,
“Dollars”, “Downgrade Drawing”, “Downgraded Facility”, “Equipment Notes”, “Fee Letter”, “Final Legal Distribution Date”, “Indenture”, “Interest Payment Date”,
“Investment Earnings”, “Liquidity Facility”, “Loan 

  

					
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Trustee”, “Long-Term Rating”, “Non-Extended Facility”, “Note Purchase Agreement”, “Operative Agreements”,
“Participation Agreements”, “Performing Equipment Note”, “Person”, “Pool Balance”, “Rating Agencies”, “Regular Distribution Date”, “Replacement Liquidity Facility”,
“Responsible Officer”, “Scheduled Payment”, “Series A Equipment Notes”, “Series AA Equipment Notes”, “Series B Equipment Notes”, “Special Payment”, “Spirit”, “Spirit
Bankruptcy Event”, “Stated Interest Rate”, “Subordination Agent”, “Taxes”, “Threshold Rating”, “Treasury Regulations”, “Trust Agreement”, “Trustee”, “Underwriters”,
“Underwriting Agreement”, and “United States”. 
 ARTICLE II 

AMOUNT AND TERMS OF THE COMMITMENT 

Section 2.01 The Advances. The Liquidity Provider hereby irrevocably agrees, on the terms and conditions hereinafter set forth, to
make Advances to the Borrower from time to time on any Business Day during the period from the Effective Date until 12:00 noon (New York City time) on the Expiry Date (unless the obligations of the Liquidity Provider shall be earlier terminated in
accordance with the terms of Section 2.04(b)) in an aggregate amount at any time outstanding not to exceed the Maximum Commitment. 

Section 2.02 Making of Advances. (a) Each Interest Advance shall be made by the Liquidity Provider upon delivery to the
Liquidity Provider of a written and completed Notice of Borrowing in substantially the form of Annex I, signed by a Responsible Officer of the Borrower, such Interest Advance to be in an amount not exceeding the Maximum Available Commitment
at such time and used solely for the payment when due of interest with respect to the Class AA Certificates at the Stated Interest Rate therefor in accordance with Section 3.05(a) and 3.05(b) of the Intercreditor Agreement. Each Interest
Advance made hereunder shall automatically reduce the Maximum Available Commitment and the amount available to be borrowed hereunder by subsequent Advances by the amount of such Interest Advance (subject to reinstatement as provided in the next
sentence). Upon repayment to the Liquidity Provider in full or in part of the amount of any Interest Advance made pursuant to this Section 2.02(a), together with accrued interest thereon (as provided herein), the Maximum Available Commitment
shall be reinstated by an amount equal to the amount of such Interest Advance so repaid, but not to exceed the Maximum Commitment; provided, however, that the Maximum Available Commitment shall not be so reinstated at any time if
(x) both a Performing Note Deficiency exists and a Liquidity Event of Default shall have occurred and be continuing or (y) a Final Advance, a Downgrade Advance, a Non-Extension Advance or a Special
Termination Advance shall have occurred, except as provided in Section 2.06(d) with respect to a Downgrade Drawing. 
 (b) (i) A Non-Extension Advance shall be made by the Liquidity Provider in a single Borrowing if this Agreement is not extended in accordance with Section 3.05(d) of the 


  

					
		  	11	  	 Revolving Credit Agreement (Class AA)

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Intercreditor Agreement unless a Replacement Liquidity Facility to replace this Agreement shall have been previously delivered to the Borrower in accordance with said Section 3.05(d), upon
delivery to the Liquidity Provider of a written and completed Notice of Borrowing in substantially the form of Annex II, signed by a Responsible Officer of the Borrower, in an amount equal to the Maximum Available Commitment at such time, and
shall be used to fund the Class AA Cash Collateral Account in accordance with Sections 3.05(d) and 3.05(f) of the Intercreditor Agreement. 

(ii) A Downgrade Advance shall be made by the Liquidity Provider in a single Borrowing upon this Liquidity Facility becoming a Downgraded
Facility (as provided for in Section 3.05(c) of the Intercreditor Agreement) unless a Replacement Liquidity Facility to replace this Agreement shall have been previously delivered to the Borrower in accordance with said Section 3.05(c),
upon delivery to the Liquidity Provider of a written and completed Notice of Borrowing in substantially the form of Annex III, signed by a Responsible Officer of the Borrower, in an amount equal to the Maximum Available Commitment at such
time, and shall be used to fund the Class AA Cash Collateral Account in accordance with Sections 3.05(c) and 3.05(f) of the Intercreditor Agreement. 

(c) A Final Advance shall be made by the Liquidity Provider in a single Borrowing following the receipt by the Borrower of a Termination Notice
from the Liquidity Provider pursuant to Section 6.01(a) upon delivery to the Liquidity Provider of a written and completed Notice of Borrowing in substantially the form of Annex IV, signed by a Responsible Officer of the Borrower, in an
amount equal to the Maximum Available Commitment at such time, and shall be used to fund the Class AA Cash Collateral Account in accordance with Sections 3.05(f) and 3.05(i) of the Intercreditor Agreement. 

(d) A Special Termination Advance shall be made in a single Borrowing upon the receipt by the Borrower of a Special Termination Notice from the
Liquidity Provider pursuant to Section 6.01(b), by delivery to the Liquidity Provider of a written and completed Notice of Borrowing in substantially the form of Annex V, signed by a Responsible Officer of the Borrower, in an amount
equal to the Maximum Available Commitment at such time, and shall be used to fund the Class AA Cash Collateral Account in accordance with Section 3.05(f) and Section 3.05(k) of the Intercreditor Agreement. 

(e) Each Borrowing shall be made by notice in writing (a “Notice of Borrowing”) in substantially the form required by
Section 2.02(a), 2.02(b), 2.02(c) or 2.02(d), as the case may be, given by the Borrower to the Liquidity Provider. If a Notice of Borrowing is delivered by the Borrower in respect of any Borrowing no later than 12:30 p.m. (New York City
time) on a Business Day, upon satisfaction of the conditions precedent set forth in Section 4.02 with respect to such requested Borrowing, the Liquidity Provider shall make available to the Borrower, in accordance with its payment instructions,
the amount of such Borrowing in Dollars and immediately available funds, before 4:00 p.m. (New York City time) on such Business Day 

  

					
		  	12	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
or before 12:30 p.m. (New York City time) on such later Business Day specified in such Notice of Borrowing. If a Notice of Borrowing is delivered by the Borrower in respect of any Borrowing
after 12:30 p.m. (New York City time) on a Business Day, upon satisfaction of the conditions precedent set forth in Section 4.02 with respect to such requested Borrowing, the Liquidity Provider shall make available to the Borrower, in
accordance with its payment instructions, the amount of such Borrowing in Dollars and immediately available funds, before 1:00 p.m. (New York City time) on the first Business Day next following the day of receipt of such Notice of Borrowing or
on such later Business Day specified by the Borrower in such Notice of Borrowing. Payments of proceeds of a Borrowing shall be made by wire transfer of immediately available funds to the Borrower in accordance with such wire transfer instructions as
the Borrower shall furnish from time to time to the Liquidity Provider for such purpose. Each Notice of Borrowing shall be irrevocable and binding on the Borrower. Each Notice of Borrowing shall be effective upon delivery of a copy thereof to the
Liquidity Provider at the address and in the manner specified in Section 7.02 hereof. 
 (f) Upon the making of any Advance requested
pursuant to a Notice of Borrowing in accordance with the Borrower’s payment instructions, the Liquidity Provider shall be fully discharged of its obligation hereunder with respect to such Notice of Borrowing, and the Liquidity Provider shall
not thereafter be obligated to make any further Advances hereunder in respect of such Notice of Borrowing to the Borrower or to any other Person (including the Class AA Trustee or any Class AA Certificateholder). If the Liquidity Provider
makes an Advance requested pursuant to a Notice of Borrowing before 12:00 noon (New York City time) on the second Business Day after the date of payment specified in Section 2.02(e), the Liquidity Provider shall have fully discharged its
obligations hereunder with respect to such Advance and an event of default shall not have occurred hereunder. Following the making of any Advance pursuant to Section 2.02(b), 2.02(c) or 2.02(d) to fund the Class AA Cash Collateral Account,
the Liquidity Provider shall have no interest in or rights to the Class AA Cash Collateral Account, such Advance or any other amounts from time to time on deposit in the Class AA Cash Collateral Account; provided that the foregoing
shall not affect or impair the obligations of the Subordination Agent to make the distributions contemplated by Section 3.05(c)(v), 3.05(e) or 3.05(f) of the Intercreditor Agreement. By paying to the Borrower proceeds of Advances requested by
the Borrower in accordance with the provisions of this Agreement, the Liquidity Provider makes no representation as to, and assumes no responsibility for, the correctness or sufficiency for any purpose of the amount of the Advances so made and
requested. 
 Section 2.03 Fees. The Borrower agrees to pay to the Liquidity Provider the fees set forth in the Fee Letter. 

Section 2.04 Reduction or Termination of the Maximum Commitment. (a) Automatic Reduction. Promptly following each date on
which the Required Amount is reduced as a result of a reduction in the Pool Balance of the Class AA Certificates, the Maximum Commitment shall automatically be reduced to an amount equal to such reduced Required Amount (as calculated by the
Borrower). The Borrower shall give notice of any such automatic reduction of the Maximum 

  

					
		  	13	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
Commitment to the Liquidity Provider and Spirit within two Business Days thereof. The failure by the Borrower to furnish any such notice shall not affect any such automatic reduction of the
Maximum Commitment. 
 (b) Termination. Upon the making of any Provider Advance or Special Termination Advance or the making of or
conversion to a Final Advance hereunder or the occurrence of the Termination Date, the obligation of the Liquidity Provider to make further Advances hereunder shall automatically and irrevocably terminate, and the Borrower shall not be entitled to
request any further Borrowing hereunder, except in the case of a Downgrade Advance, as provided in Section 2.06(d). 

Section 2.05 Repayments of Interest Advances, the Special Termination Advance or the Final Advance. Subject to Sections 2.06, 2.07
and 2.09 hereof, the Borrower hereby agrees, without notice of an Advance or demand for repayment from the Liquidity Provider (which notice and demand are hereby waived by the Borrower), to pay, or to cause to be paid, to the Liquidity Provider
(a) on each date on which the Liquidity Provider shall make an Interest Advance, the Special Termination Advance or the Final Advance, an amount equal to the amount of such Advance (any such Advance, until repaid, is referred to herein as an
“Unpaid Advance”), plus (b) interest on the amount of each such Unpaid Advance in the amounts and on the dates determined as provided in Section 3.07; provided that if (i) the Liquidity Provider shall
make a Provider Advance at any time after making one or more Interest Advances which shall not have been repaid in accordance with this Section 2.05 or (ii) this Liquidity Facility shall become a Downgraded Facility or Non-Extended Facility at any time when unreimbursed Interest Advances have reduced the Maximum Available Commitment to zero, then such Interest Advances shall cease to constitute Unpaid Advances and shall be deemed
to have been changed into an Applied Downgrade Advance or an Applied Non-Extension Advance, as the case may be, for all purposes of this Agreement (including, without limitation, for the purpose of determining
when such Interest Advance is required to be repaid to the Liquidity Provider in accordance with Section 2.06 and for the purposes of Section 2.06(b)); provided, further, that amounts in respect of a Special Termination
Advance withdrawn from the Class AA Cash Collateral Account for the purpose of paying interest on the Class AA Certificates in accordance with Section 3.05(f) of the Intercreditor Agreement (the portion of the outstanding Special
Termination Advance equal to the amount of any such withdrawal, but not in excess of the outstanding Special Termination Advance, being an “Applied Special Termination Advance”) shall thereafter (subject to
Section 2.06(b)) be treated as an Interest Advance under this Agreement for purposes of determining the Applicable Liquidity Rate for interest payable thereon; provided, further, that if, following the making of a Special
Termination Advance, the Liquidity Provider delivers a Termination Notice to the Borrower pursuant to Section 6.01(a), such Special Termination Advance (including any portion thereof that is an Applied Special Termination Advance) shall
thereafter be treated as a Final Advance under this Agreement for purposes of determining the Applicable Liquidity Rate for interest payable thereon; and, provided, further, that if, after making a Provider Advance, the Liquidity
Provider delivers a Special Termination Notice to the Borrower pursuant to Section 6.01(b), any Unapplied Provider Advance shall be converted to and treated as a Special Termination Advance under this Agreement for purposes of determining 

  

					
		  	14	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
the Applicable Liquidity Rate for interest payable thereon and the obligation for repayment thereof under the Intercreditor Agreement. The Borrower and the Liquidity Provider agree that the
repayment in full of each Interest Advance, Special Termination Advance and Final Advance on the date such Advance is made is intended to be a contemporaneous exchange for new value given to the Borrower by the Liquidity Provider. For the avoidance
of doubt, interest payable on an Interest Advance, Special Termination Advance or the Final Advance shall not be regarded as overdue unless such interest is not paid when due under Section 3.07. 

Section 2.06 Repayments of Provider Advances. (a) Amounts advanced hereunder in respect of a Provider Advance shall be
deposited in the Class AA Cash Collateral Account and invested and withdrawn from the Class AA Cash Collateral Account as set forth in Sections 3.05(c), 3.05(d), 3.05(e) and 3.05(f) of the Intercreditor Agreement. Subject to Sections 2.07
and 2.09, the Borrower agrees to pay to the Liquidity Provider, on each Regular Distribution Date, commencing on the first Regular Distribution Date after the making of a Provider Advance, interest on the principal amount of any such Provider
Advance, in the amounts determined as provided in Section 3.07; provided, however, that amounts in respect of a Provider Advance withdrawn from the Class AA Cash Collateral Account for the purpose of paying interest on the
Class AA Certificates in accordance with Section 3.05(f) of the Intercreditor Agreement (the amount of any such withdrawal being (y), in the case of a Downgrade Advance, an “Applied Downgrade Advance” and
(z) in the case of a Non-Extension Advance, an “Applied Non-Extension Advance” and together with an Applied Downgrade Advance, an
“Applied Provider Advance”) shall thereafter (subject to Section 2.06(b)) be treated as an Interest Advance under this Agreement for purposes of determining the Applicable Liquidity Rate for interest payable thereon;
provided, further, however, that if, following the making of a Provider Advance, the Liquidity Provider delivers a Termination Notice to the Borrower pursuant to Section 6.01(a), such Provider Advance shall thereafter be
treated as a Final Advance under this Agreement for purposes of determining the Applicable Liquidity Rate for interest payable thereon. Subject to Sections 2.07 and 2.09, immediately upon the withdrawal of any amounts from the Class AA Cash
Collateral Account on account of a reduction in the Required Amount, the Borrower shall repay to the Liquidity Provider a portion of the Provider Advances in a principal amount equal to such reduction, plus interest on the principal amount so repaid
as provided in Section 3.07. 
 (b) At any time when an Applied Provider Advance or Applied Special Termination Advance (or any portion
thereof) is outstanding, upon the deposit in the Class AA Cash Collateral Account of any amount pursuant to clause “fourth” of Section 3.02 of the Intercreditor Agreement (any such amount being a “Replenishment
Amount”) for the purpose of replenishing or increasing the balance thereof up to the Required Amount at such time, (i) the aggregate outstanding principal amount of all Applied Provider Advances and Applied Special Termination
Advances (and of Provider Advances and Special Termination Advances treated as Interest Advances for purposes of determining the Applicable Liquidity Rate for interest payable thereon) shall be automatically reduced by the amount of such
Replenishment Amount, and (ii) the aggregate outstanding principal amount of all Unapplied Provider Advances shall be automatically increased by the amount of such Replenishment Amount. 

  

					
		  	15	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 (c) Upon the provision of a Replacement Liquidity Facility in replacement of this Agreement in
accordance with Section 3.05(e) of the Intercreditor Agreement, as provided in Section 3.05(f) of the Intercreditor Agreement, amounts remaining on deposit in the Class AA Cash Collateral Account after giving effect to any Applied
Provider Advance or Applied Special Termination Advance on the date of such replacement shall be reimbursed to the Liquidity Provider, but only to the extent such amounts are necessary to repay in full to the Liquidity Provider all amounts owing to
it hereunder. 
 (d) If, at any time after making a Downgrade Advance, the Liquidity Provider satisfies the Threshold Rating and delivers
written notice to that effect to the Borrower and Spirit, as of the second Business Day following receipt of such notice, (i) this Liquidity Facility shall cease to be a Downgraded Facility, (ii) any Unapplied Downgrade Advance shall be
withdrawn from the Class AA Cash Collateral Account and reimbursed to the Liquidity Provider, (iii) any Applied Downgrade Advance shall be converted to an Interest Advance, (iv) the Maximum Available Commitment shall be reinstated by
an amount equal to the amount of such Unapplied Downgrade Advance so reimbursed, but not to exceed the Maximum Commitment, and the obligation of the Liquidity Provider to make Advances shall be reinstated in an equal amount, (v) the Borrower
shall be entitled to request Borrowings and (vi) the proviso in the definition of Maximum Available Commitment and the proviso in the final sentence of Section 2.02(a) shall, in each case, no longer apply to such Downgrade Advance. 

Section 2.07 Payments to the Liquidity Provider Under the Intercreditor Agreement. In order to provide for payment or repayment to
the Liquidity Provider of any amounts hereunder, the Intercreditor Agreement provides that amounts available and referred to in Articles II and III of the Intercreditor Agreement, to the extent payable to the Liquidity Provider pursuant to the terms
of the Intercreditor Agreement (including, without limitation, Section 3.05(f) of the Intercreditor Agreement), shall be paid to the Liquidity Provider in accordance with the terms thereof (but, for the avoidance of doubt, without duplication
of or increase in any amounts payable hereunder). Amounts so paid to the Liquidity Provider shall be applied by the Liquidity Provider in the order of priority required by the applicable provisions of Articles II and III of the Intercreditor
Agreement and shall discharge in full the corresponding obligations of the Borrower hereunder. 
 Section 2.08 Book Entries. The
Liquidity Provider shall maintain in accordance with its usual practice an account or accounts evidencing the indebtedness of the Borrower resulting from Advances made from time to time and the amounts of principal and interest payable hereunder and
paid from time to time in respect thereof; provided, however, that the failure by the Liquidity Provider to maintain such account or accounts shall not affect the obligations of the Borrower in respect of Advances. 

Section 2.09 Payments from Available Funds Only. All payments to be made by the Borrower under this Agreement shall be made only
from the amounts that constitute Scheduled 

  

					
		  	16	  	 Revolving Credit Agreement (Class AA)

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Payments, Special Payments and other payments under the Operative Agreements, including payment under Section 4.02 of the Participation Agreements and payments under Section 2.14 of the
Indentures, and only to the extent that the Borrower shall have sufficient income or proceeds therefrom to enable the Borrower to make payments in accordance with the terms hereof after giving effect to the priority of payments provisions set forth
in the Intercreditor Agreement. The Liquidity Provider agrees that it will look solely to such amounts to the extent available for distribution to it as provided in the Intercreditor Agreement and this Agreement and that the Borrower, in its
individual capacity, is not personally liable to it for any amounts payable or liability under this Agreement except as expressly provided in this Agreement, the Intercreditor Agreement or any Participation Agreement. Amounts on deposit in the
Class AA Cash Collateral Account shall be available to the Borrower to make payments under this Agreement only to the extent and for the purposes expressly contemplated in Section 3.05(f) of the Intercreditor Agreement. 

Section 2.10 Extension of the Expiry Date; Non-Extension Advance. If the Liquidity
Provider notifies the Borrower and Spirit in writing before the 25th day prior to any anniversary date of the Closing Date that occurs prior to the
15th day after the Final Legal Distribution Date for the Class AA Certificates (such notice, a “Non-Extension Notice”; and such
25th day, the “Notice Date”) that its obligations to make Advances hereunder shall not be extended beyond the immediately following anniversary date of the Closing Date
(and if the Liquidity Provider shall not have been replaced in accordance with Section 3.05(e) of the Intercreditor Agreement), the Borrower shall be entitled on and after the Notice Date (but prior to such anniversary date and in any event
prior to the then applicable Expiry Date) to request a Non-Extension Advance in accordance with Section 2.02(b)(i) hereof and Section 3.05(d) of the Intercreditor Agreement. 

ARTICLE III 
 OBLIGATIONS OF THE
BORROWER 
 Section 3.01 Increased Costs. Without duplication of any rights created by Section 3.03, if as a result of any
Regulatory Change there shall be any increase by an amount reasonably deemed by the Liquidity Provider to be material in the actual cost to the Liquidity Provider of making, funding or maintaining any Advances or its obligation to make any such
Advances or there shall be any reduction by an amount reasonably deemed by the Liquidity Provider to be material in the amount receivable by the Liquidity Provider under this Agreement or the Intercreditor Agreement in respect thereof, and in case
of either such an increase or reduction, such event does not arise from the gross negligence or willful misconduct of the Liquidity Provider, from its breach of any of its representations, warranties, covenants or agreements contained herein or in
the Intercreditor Agreement or from its failure to comply with any such Regulatory Change (any such increase or reduction being referred to herein as an “Increased Cost”), then, subject to Sections 2.07 and 2.09, the Borrower
shall from time to time pay to the Liquidity Provider an amount equal to such Increased Cost within 10 Business Days after delivery to the Borrower and Spirit of a certificate of an officer of the Liquidity Provider 

  

					
		  	17	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
describing in reasonable detail the event by reason of which it claims such Increased Cost and the basis for the determination of the amount of such Increased Cost; provided that the
Borrower shall be obligated to pay amounts only with respect to any Increased Costs accruing from the date 120 days prior to the date of delivery of such certificate. Such certificate, in the absence of manifest error, shall be considered prima
facie evidence of the amount of the Increased Costs for purposes of this Agreement; provided that any determinations and allocations by the Liquidity Provider of the effect of any Regulatory Change on the costs of maintaining the Advances or
the obligation to make Advances are made on a reasonable basis. For the avoidance of doubt, the Liquidity Provider shall not be entitled to assert any claim under this Section 3.01 in respect of or attributable to Excluded Taxes. The Liquidity
Provider will notify the Borrower and Spirit as promptly as practicable of any event occurring after the date of this Agreement that will entitle the Liquidity Provider to compensation under this Section 3.01. The Liquidity Provider agrees to
investigate all commercially reasonable alternatives for reducing any Increased Costs and to use all commercially reasonable efforts to avoid or minimize, to the greatest extent possible, any claim in respect of Increased Costs, including, without
limitation, by designating a different Lending Office, if such designation or other action would avoid the need for, or reduce the amount of, any such claim; provided that the foregoing shall not obligate the Liquidity Provider to take any
action that would, in its reasonable judgment, cause the Liquidity Provider to take any action that is not materially consistent with its internal policies or is otherwise materially disadvantageous to the Liquidity Provider or that would cause the
Liquidity Provider to incur any material loss or cost, unless the Borrower or Spirit agrees to reimburse or indemnify the Liquidity Provider therefor. If no such designation or other action is effected, or, if effected, such notice fails to avoid
the need for any claim in respect of Increased Costs, Spirit may arrange for a Replacement Liquidity Facility in accordance with Section 3.05(e) of the Intercreditor Agreement. 

Notwithstanding the foregoing provisions, in no event shall the Borrower be required to make payments under this Section 3.01:
(a) in respect of any Regulatory Change proposed by any applicable governmental authority (including any branch of a legislature), central bank or comparable agency of the United States or the Liquidity Provider’s jurisdiction of
organization or in which its Lending Office is located and pending as of the date of this Agreement (it being agreed that the Regulatory Changes contemplated by the frameworks published by the Basel Committee on Banking Supervision entitled
“Basel III: A global regulatory framework for more resilient banks and banking systems” dated December 2010 (revised June 2011) and “Basel III: The Liquidity Coverage Ratio and liquidity risk monitoring tools,” dated January
2013, shall not be considered to have been proposed or pending as of the date of this Agreement); (b) if a claim hereunder in respect of an Increased Cost arises through circumstances peculiar to the Liquidity Provider and that do not affect
similarly organized commercial banking institutions in the same jurisdiction generally that are in compliance with the law, rule, regulation or interpretation giving rise to the Regulatory Change relating to such Increased Cost; (c) if the
Liquidity Provider shall fail to comply with its obligations under this Section 3.01 or (d) if the Liquidity Provider is not also seeking payment for similar increased costs in other similarly situated transactions related to the airline
industry. 

  

					
		  	18	  	 Revolving Credit Agreement (Class AA)

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 Section 3.02 Reserved. 

Section 3.03 Withholding Taxes. (a) All payments made by the Borrower under this Agreement shall be made without deduction or
withholding for or on account of any Taxes, unless such deduction or withholding is required by law. If any Taxes are so required to be withheld or deducted from any amounts payable to the Liquidity Provider under this Agreement, then, subject to
Sections 2.07 and 2.09, the Borrower shall pay to the relevant authorities the full amount so required to be deducted or withheld and, without duplication of any rights created by Section 3.01, if such Taxes are Covered Taxes, pay to the
Liquidity Provider such additional amounts as shall be necessary to ensure that the net amount actually received by the Liquidity Provider (after deduction or withholding of all Covered Taxes) shall be equal to the full amount that would have been
received by the Liquidity Provider had no withholding or deduction of Covered Taxes been required. The Liquidity Provider agrees to use reasonable efforts (consistent with applicable legal and regulatory restrictions) to change the jurisdiction of
its Lending Office if making such change would avoid the need for, or reduce the amount of, any such additional amounts that may thereafter accrue and would not, in the reasonable judgment of the Liquidity Provider, be otherwise materially
disadvantageous to the Liquidity Provider. 
 If the Liquidity Provider receives a refund of, or realizes a net Tax benefit not otherwise
available to it as a result of, any Taxes for which additional amounts were paid by the Borrower pursuant to this Section 3.03, the Liquidity Provider shall pay to the Borrower (for deposit into the Collection Account) the amount of such refund
(and any interest thereon), net of any related out-of-pocket expenses, or net benefit. The Borrower, upon the request of the Liquidity Provider, shall repay to the
Liquidity Provider the amount paid over pursuant to this paragraph (plus any penalties, interest or other charges imposed by the relevant governmental or taxing authority) in the event that the Liquidity Provider is required to repay such refund to
such governmental or taxing authority. Notwithstanding anything to the contrary in this paragraph, in no event will the Liquidity Provider be required to pay any amount to the Borrower pursuant to this paragraph the payment of which would place the
Liquidity Provider in a less favorable net after-Tax position than the Liquidity Provider would have been in if the Tax subject to indemnification and giving rise to such refund or net Tax benefit had not been
deducted, withheld or otherwise imposed and the indemnification payments or additional amounts with respect to such Tax had never been paid. This paragraph shall not be construed to require the Liquidity Provider to make available its Tax returns
(or any other information relating to its Taxes that it deems confidential) to the Borrower or any other Person. 
 The Liquidity Provider
will (i) provide (on its behalf and on behalf of any participant holding a Participation pursuant to Section 7.08) to the Borrower (x) on or prior to the Effective Date two valid completed and executed copies of Internal Revenue
Service Form W-9, W-8BEN-E or W-8ECI (whichever is applicable), including thereon a valid
U.S. taxpayer identification number (or, with respect to any such participant, such other form or documentation as may be applicable) covering all amounts receivable by it in connection with the transactions contemplated by the Operative Agreements
and (y) thereafter from time to time such additional 

  

					
		  	19	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
forms or documentation as may be necessary to establish an available exemption from withholding of United States Tax on payments hereunder so that such forms or documentation are effective for
all periods during which it is the Liquidity Provider and (ii) provide timely notice to the Borrower if any such form or documentation is or becomes inaccurate. The Liquidity Provider shall deliver to the Borrower such other forms or documents
as may be reasonably requested by the Borrower or required by applicable law to establish that payments hereunder are exempt from or entitled to a reduced rate of Covered Taxes. 

(b) All payments (including, without limitation, Advances) made by the Liquidity Provider under this Agreement shall be made free and clear of,
and without reduction for or on account of, any Taxes. If any Taxes are required to be withheld or deducted from any amounts payable to the Borrower under this Agreement, the Liquidity Provider shall (i) within the time prescribed therefor by
applicable law pay to the appropriate governmental or taxing authority the full amount of any such Taxes (and any additional Taxes in respect of the additional amounts payable under clause (ii) hereof) and make such reports or returns in
connection therewith at the time or times and in the manner prescribed by applicable law, and (ii) pay to the Borrower an additional amount which (after deduction of all such Taxes) will be sufficient to yield to the Borrower the full amount
which would have been received by it had no such withholding or deduction been made. Within 30 days after the date of each payment hereunder, the Liquidity Provider shall furnish to the Borrower the original or a certified copy of (or other
documentary evidence of) the payment of the Taxes applicable to such payment. 
 If any exemption from, or reduction in the rate of, any
Taxes required to be borne by the Liquidity Provider under this Section 3.03(b) is reasonably available to the Borrower without providing any information regarding the holders or beneficial owners of the Certificates, the Borrower shall deliver
the Liquidity Provider such form or forms and such other evidence of the eligibility of the Borrower for such exemption or reductions (but without any requirement to provide any information regarding the holders or beneficial owners of the
Certificates) as the Liquidity Provider may reasonably identify to the Borrower as being required as a condition to exemption from, or reduction in the rate of, such Taxes. 

(c) If a payment made hereunder to the Liquidity Provider would be subject to U.S. federal withholding Tax imposed by FATCA if the Liquidity
Provider were to fail to comply with the applicable reporting requirement of FATCA (including without limitation those contained in Section 1471(b) or 1472(b) of the Code, as applicable), the Liquidity Provider shall deliver to the Borrower at
the time or times prescribed by law and at such time or times reasonably requested by the Borrower such documentation prescribed by applicable law (including as prescribed by Section 1471(b)(3)(C)(i) of the Code) and such additional
documentation reasonably requested by the Borrower as may be necessary for the Borrower to comply with the Borrower’s obligations under FATCA and to determine whether the Liquidity Provider has complied with the Liquidity Provider’s
obligations under FATCA or to determine the amount to deduct and withhold from such payment. Solely for purposes of this paragraph, “FATCA” shall include any amendments made to FATCA after the date of this Agreement. 

  

					
		  	20	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 Section 3.04 Payments. Subject to Sections 2.07 and 2.09, the Borrower shall make or
cause to be made each payment to the Liquidity Provider under this Agreement so as to cause the same to be received by the Liquidity Provider not later than 1:00 p.m. (New York City time) on the day when due. The Borrower shall make all such
payments in Dollars, to the Liquidity Provider in immediately available funds, by wire transfer to the account of Commonwealth Bank of Australia, New York Branch, at The Bank of New York Mellon, New York, New York; Swift/ABA Routing No.
[            ]; For Account of Commonwealth Bank of Australia, New York; Account #: [            ], Reference to: Spirit 2017-1AA, Attention: Loan Administration; or to such other U.S. bank account as the Liquidity Provider may from time to time direct the Subordination Agent. 

Section 3.05 Computations. All computations of interest based on the Base Rate shall be made on the basis of a year of 365 or 366
days, as the case may be, and all computations of interest based on the LIBOR Rate shall be made on the basis of a year of 360 days, in each case for the actual number of days (including the first day but excluding the last day) occurring in the
period for which such interest is payable. 
 Section 3.06 Payment on Non-Business
Days. Whenever any payment to be made hereunder shall be stated to be due on a day other than a Business Day, such payment shall be made on the next succeeding Business Day and no additional interest shall be due as a result (and if so made,
shall be deemed to have been made when due). If any payment in respect of interest on an Advance is so deferred to the next succeeding Business Day, such deferral shall not delay the commencement of the next Interest Period for such Advance (if such
Advance is a LIBOR Advance) or reduce the number of days for which interest will be payable on such Advance on the next Interest Payment Date for such Advance. 

Section 3.07 Interest. (a) Subject to Sections 2.07 and 2.09, the Borrower shall pay, or shall cause to be paid, without
duplication, interest on (i) the unpaid principal amount of each Advance from and including the date of such Advance (or, in the case of an Applied Provider Advance or Applied Special Termination Advance, from and including the date on which
the amount thereof was withdrawn from the Class AA Cash Collateral Account to pay interest on the Class AA Certificates) to but excluding the date such principal amount shall be paid in full (or, in the case of an Applied Provider Advance
or Applied Special Termination Advance, the date on which the Class AA Cash Collateral Account is fully replenished in respect of such Advance) and (ii), to the extent permitted by law, any other amount due hereunder (whether fees,
commissions, expenses or other amounts or installments of interest on Advances or any such other amount) that is not paid when due (whether at stated maturity, by acceleration or otherwise) from and including the due date thereof to but excluding
the date such amount is paid in full, in each such case, at the interest rate per annum for each day that such amount remains overdue and unpaid equal to the Applicable Liquidity Rate for such Advance or such other amount, as the case may be, as in
effect for such day, but in no event in any case referred to in clause (i) or (ii) above at a rate per annum greater than the maximum rate permitted by applicable law; provided, however, that, if at any time the otherwise
applicable interest rate as set 

  

					
		  	21	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
forth in this Section 3.07 shall exceed the maximum rate permitted by applicable law, then to the maximum extent permitted by applicable law any subsequent reduction in such interest rate
will not reduce the rate of interest payable pursuant to this Section 3.07 below the maximum rate permitted by applicable law until the total amount of interest accrued equals the absolute amount of interest that would have accrued (without
additional interest thereon) if such otherwise applicable interest rate as set forth in this Section 3.07 had at all relevant times been in effect. 

(b) Each Advance (other than a Provider Advance or a Special Termination Advance) will be a Base Rate Advance for the period from the date of
its Borrowing to (but excluding) the third Business Day following the Liquidity Provider’s receipt of the Notice of Borrowing for such Advance. Thereafter, such Advance shall be a LIBOR Advance, and an Applied Provider Advance and an Applied
Special Termination Advance shall be a LIBOR Advance from the date of its withdrawal from the Class AA Cash Collateral Account. 
 (c)
Each LIBOR Advance shall bear interest during each Interest Period at a rate per annum equal to the LIBOR Rate for such Interest Period plus the Applicable Margin for such LIBOR Advance, payable in arrears on the last day of such Interest Period
and, in the event of the payment of principal of such LIBOR Advance on a day other than such last day, on the date of such payment (to the extent of interest accrued on the amount of principal repaid). 

(d) Each Base Rate Advance shall bear interest at a rate per annum equal to the Base Rate plus the Applicable Margin for such Base Rate
Advance, payable in arrears on each Regular Distribution Date and, in the event of the payment of principal of such Base Rate Advance on a day other than a Regular Distribution Date, on the date of such payment (to the extent of interest accrued on
the amount of principal repaid). 
 (e) Each outstanding Unapplied Non-Extension Advance, Unapplied
Downgrade Advance or Unapplied Special Termination Advance (each, an “Unapplied Advance”), as the case may be, shall bear interest, payable in arrears on each Regular Distribution Date, in an amount equal to (i) the Investment
Earnings on the amounts on deposit in the Class AA Cash Collateral Account on account of such Unapplied Advance during the period beginning on the later of the date of deposit of such Unapplied Advance and the preceding Regular Distribution
Date and ending on the last day prior to such Regular Distribution Date or, if greater, interest on such Unapplied Advance during such period at the interest rate per annum specified for such Unapplied Advance in the Fee Letter, plus (ii) an
amount equal to interest at the Applicable Margin on the amount of such Unapplied Advance during such period. 
 (f) Each amount not paid
when due hereunder (whether fees, commissions, expenses or other amounts or installments of interest on Advances but excluding Advances) shall bear interest, to the extent permitted by applicable law, at a rate per annum equal to the Base Rate plus
2.0% per annum until paid. 

  

					
		  	22	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 (g) If at any time, the Liquidity Provider shall have determined (which determination shall be
conclusive and binding upon the Borrower, absent manifest error) that, by reason of circumstances affecting the relevant interbank lending market generally, the LIBOR Rate determined or to be determined for the next succeeding Interest Period will
not adequately and fairly reflect the cost to the Liquidity Provider (as conclusively certified by the Liquidity Provider, absent manifest error) of making or maintaining Advances, the Liquidity Provider shall give facsimile or telephonic notice
thereof (a “Rate Determination Notice”) to the Borrower and Spirit. If such notice is given, then the outstanding principal amount of the LIBOR Advances shall be converted to Base Rate Advances effective from the date of the
Rate Determination Notice; provided that the Applicable Liquidity Rate in respect of such Base Rate Advances shall be increased by one percent (1.00%). The Liquidity Provider shall withdraw a Rate Determination Notice given hereunder when the
Liquidity Provider determines that the circumstances giving rise to such Rate Determination Notice no longer apply to the Liquidity Provider, and the Base Rate Advances shall be converted to LIBOR Advances effective as of the first day of the next
succeeding Interest Period after the date of such withdrawal. 
 (h) Each change in the Base Rate shall become effective immediately. The
rates of interest specified in this Section 3.07 with respect to any Advance or other amount shall be referred to as the “Applicable Liquidity Rate”. 

Section 3.08 Replacement of Borrower. Subject to Section 5.02, from time to time and subject to the successor Borrower’s
meeting the eligibility requirements set forth in Section 6.09 of the Intercreditor Agreement applicable to the Subordination Agent, upon the effective date and time specified in a written and completed Notice of Replacement Subordination Agent
in substantially the form of Annex VIII (a “Notice of Replacement Subordination Agent”) delivered to the Liquidity Provider by the then Borrower, the successor Borrower designated therein shall become the Borrower for
all purposes hereunder. 
 Section 3.09 Funding Loss Indemnification. The Borrower shall pay to the Liquidity Provider, upon the
request of the Liquidity Provider, such amount or amounts as shall be sufficient (in the reasonable opinion of the Liquidity Provider) to compensate it for any loss, cost or expense incurred by reason of the liquidation or redeployment of deposits
or other funds acquired by the Liquidity Provider to fund or maintain any LIBOR Advance (but excluding loss of the Applicable Margin or anticipated profits) incurred as a result of: 

(1) Any repayment of a LIBOR Advance on a date other than the last day of the Interest Period for such Advance; or 

(2) Any failure by the Borrower to borrow a LIBOR Advance on the date for borrowing specified in the relevant notice under
Section 2.02. 

  

					
		  	23	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 Section 3.10 Illegality. Notwithstanding any other provision in this Agreement, if
any change in any law, rule or regulation applicable to or binding on the Liquidity Provider, or any change in the interpretation or administration thereof by any governmental authority, central bank or comparable agency charged with the
interpretation or administration thereof, or compliance by the Liquidity Provider with any request or directive (whether or not having the force of law) of any such authority, central bank or comparable agency shall make it unlawful or impossible
for the Liquidity Provider to maintain or fund its LIBOR Advances, then upon notice to the Borrower and Spirit by the Liquidity Provider, the outstanding principal amount of the LIBOR Advances shall be converted to Base Rate Advances
(a) immediately upon demand of the Liquidity Provider, if such change or compliance with such request, in the reasonable judgment of the Liquidity Provider, requires immediate conversion; or (b) at the expiration of the last Interest
Period to expire before the effective date of any such change or request. The Liquidity Provider will notify the Borrower and Spirit as promptly as practicable of any event that will or to its knowledge is reasonably likely to lead to the conversion
of LIBOR Advances to Base Rate Advances under this Section 3.10; provided that a failure by the Liquidity Provider to notify the Borrower or Spirit of an event that is reasonably likely to lead to such a conversion prior to the time that
it is determined that such event will lead to such a conversion shall not prejudice the rights of the Liquidity Provider under this Section 3.10. The Liquidity Provider agrees to investigate all commercially reasonable alternatives for avoiding
the need for such conversion, including, without limitation, designating a different Lending Office, if such designation or other action would avoid the need to convert such LIBOR Advances to Base Rate Advances; provided that the foregoing
shall not obligate the Liquidity Provider to take any action that would, in its reasonable judgment, cause the Liquidity Provider to incur any material loss or cost, unless the Borrower or Spirit agrees to reimburse or indemnify the Liquidity
Provider therefor. If no such designation or other action is effected, or, if effected, fails to avoid the need for conversion of the LIBOR Advances to Base Rate Advances, Spirit may arrange for a Replacement Liquidity Facility in accordance with
Section 3.05(e) of the Intercreditor Agreement. 
 ARTICLE IV 

CONDITIONS PRECEDENT 

Section 4.01 Conditions Precedent to Effectiveness of Section 2.01. Section 2.01 of this Agreement shall
become effective on and as of the first date (the “Effective Date”) on which the following conditions precedent have been satisfied (or waived by the appropriate party or parties): 

(a) The Liquidity Provider shall have received on or before the Closing Date each of the following, and in the case of each document delivered
pursuant to paragraphs (i), (ii) and (iii), each in form and substance satisfactory to the Liquidity Provider: 

  

					
		  	24	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 (i) This Agreement and the Fee Letter duly executed on behalf of the Borrower
and, in the case of the Fee Letter, Spirit; 
 (ii) The Intercreditor Agreement duly executed on behalf of each of the
parties thereto (other than the Liquidity Provider); 
 (iii) Fully executed copies of each of the Operative Agreements
executed and delivered on or before the Closing Date (other than this Agreement, the Fee Letter and the Intercreditor Agreement); 

(iv) A copy of the Prospectus Supplement and specimen copies of the Class AA Certificates; 

(v) An executed copy of each opinion (other than the negative assurance letter of Debevoise and Plimpton LLP, special counsel
to Spirit, and the opinion and the negative assurance letter of White & Case LLP, special counsel to the Underwriters) delivered on the Closing Date pursuant to the Underwriting Agreement (in the case of each such opinion, either addressed
to the Liquidity Provider or accompanied by a letter from the counsel rendering such opinion to the effect that the Liquidity Provider is entitled to rely on such opinion as of its date as if it were addressed to the Liquidity Provider);  
 (vi) An executed copy of each document, instrument, certificate and
opinion delivered on or before the Closing Date pursuant to the Class AA Trust Agreement, the Intercreditor Agreement and the other Operative Agreements (in the case of each such opinion, either addressed to the Liquidity Provider or
accompanied by a letter from the counsel rendering such opinion to the effect that the Liquidity Provider is entitled to rely on such opinion as of its date as if it were addressed to the Liquidity Provider); and 

(vii) An agreement from Spirit, pursuant to which (x) Spirit agrees to provide copies of quarterly financial statements
and audited annual financial statements to the Liquidity Provider (which Spirit may provide in an electronic format by electronic mail or making such available over the internet) and (y) Spirit agrees to allow the Liquidity Provider to discuss
the transactions contemplated by the Operative Agreements with officers and employees of Spirit. 
 (b) On and as of the Effective Date no
event shall have occurred and be continuing, or would result from the entering into of this Agreement or the making of any Advance, which constitutes a Liquidity Event of Default. 

  

					
		  	25	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 (c) The Liquidity Provider shall have received payment in full of the fees and other sums
required to be paid to or for the account of the Liquidity Provider on or prior to the Effective Date pursuant to the Fee Letter. 
 (d) All
conditions precedent to the issuance of the Certificates under the Trust Agreements shall have been satisfied or waived, all conditions precedent to the effectiveness of the other Liquidity Facilities shall have been satisfied or waived, and all
conditions precedent to the purchase of the Class AA Certificates, the Class A Certificates and the Class B Certificates by the Underwriters under the Underwriting Agreement shall have been satisfied (unless any of such conditions
precedent under the Underwriting Agreement shall have been waived by the Underwriters). 
 (e) The Borrower and Spirit shall have received a
certificate, dated the Effective Date signed by a duly authorized representative of the Liquidity Provider, certifying that all conditions precedent specified in this Section 4.01 have been satisfied or waived by the Liquidity Provider. 

Section 4.02 Conditions Precedent to Borrowing. The obligation of the Liquidity Provider to make an Advance on the occasion of
each Borrowing shall be subject to the conditions precedent that the Effective Date shall have occurred and, prior to the time of such Borrowing, the Borrower shall have delivered a Notice of Borrowing which conforms to the terms and conditions of
this Agreement. 
 ARTICLE V 

COVENANTS 
 Section 5.01
Affirmative Covenants of the Borrower. So long as any Advance shall remain unpaid or the Liquidity Provider shall have any Maximum Available Commitment hereunder or the Borrower shall have any obligation to pay any amount to the Liquidity
Provider hereunder, the Borrower will, unless the Liquidity Provider shall otherwise consent in writing: 
 (a) Performance of
Agreements. Subject to Sections 2.07 and 2.09, punctually pay or cause to be paid all amounts payable by it under this Agreement and the Intercreditor Agreement and observe and perform in all material respects the conditions, covenants and
requirements applicable to it contained in this Agreement and the Intercreditor Agreement; 
 (b) Reporting Requirements. Furnish to
the Liquidity Provider with reasonable promptness, such other information and data with respect to the transactions 

  

					
		  	26	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
contemplated by the Operative Agreements as from time to time may be reasonably requested by the Liquidity Provider; and permit the Liquidity Provider, upon reasonable notice, to inspect the
Borrower’s books and records with respect to such transactions and to meet with officers and employees of the Borrower to discuss such transactions; and 

(c) Certain Operative Agreements. Furnish to the Liquidity Provider, with reasonable promptness, copies of such Operative Agreements
entered into after the date hereof as from time to time may be reasonably requested by the Liquidity Provider. 
 Section 5.02
Negative Covenants of the Borrower. Subject to the first and fourth paragraphs of Section 7.01(a) of the Intercreditor Agreement and Section 7.01(b) of the Intercreditor Agreement, so long as any Advance shall remain unpaid or the
Liquidity Provider shall have any Maximum Available Commitment hereunder or the Borrower shall have any obligation to pay any amount to the Liquidity Provider hereunder, the Borrower will not appoint or permit or suffer to be appointed any successor
Borrower without the prior written consent of the Liquidity Provider, which consent shall not be unreasonably withheld or delayed. 
 ARTICLE
VI 
 LIQUIDITY EVENTS OF DEFAULT AND SPECIAL TERMINATION 

Section 6.01 Liquidity Events of Default. (a) If any Liquidity Event of Default has occurred and is continuing and there is a
Performing Note Deficiency, the Liquidity Provider may, in its discretion, deliver to the Borrower and Spirit a Termination Notice, the effect of which shall be to cause (i) the Termination Date to occur on the fifth Business Day after the date
on which such Termination Notice is received by the Borrower and Spirit, (ii) the Borrower to promptly request, and the Liquidity Provider to promptly make, a Final Advance in accordance with Section 2.02(c) hereof and Section 3.05(i)
of the Intercreditor Agreement, (iii) all other outstanding Advances to be automatically converted into Final Advances for purposes of determining the Applicable Liquidity Rate for interest payable thereon and (iv) subject to Sections 2.07
and 2.09, all Advances, any accrued interest thereon and any other amounts outstanding hereunder to become immediately due and payable to the Liquidity Provider. 

(b) If the aggregate Pool Balance of the Class AA Certificates is greater than the aggregate outstanding principal amount of the Series AA
Equipment Notes (other than any Series AA Equipment Notes previously sold by the Borrower or with respect to which the Aircraft related to such Series AA Equipment Notes has been disposed of by the Loan Trustee) at any time during the 18-month period ending on February 15, 2030, the Liquidity Provider may, in its discretion, deliver to the Borrower and Spirit a Special Termination Notice, the effect of which shall be to cause (i) the
Termination Date to occur on the fifth Business Day after the date on which such Special Termination Notice is received by the Borrower and Spirit, (ii) the 

  

					
		  	27	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
Borrower to promptly request, and the Liquidity Provider to promptly make, a Special Termination Advance in accordance with Section 2.02(d) hereof and Section 3.05(k) of the
Intercreditor Agreement, and (iii) subject to Sections 2.07 and 2.09, all Advances (including, without limitation, any Unapplied Provider Advance), to be automatically treated as Special Termination Advances, subject to
Section 6.01(a). 
 ARTICLE VII 

MISCELLANEOUS 
 Section 7.01
No Oral Modifications or Continuing Waivers. No terms or provisions of this Agreement may be changed, waived, discharged or terminated orally, but only by an instrument in writing signed by the Borrower and the Liquidity Provider and any
other Person whose consent is required pursuant to this Agreement; provided that no such change or other action shall affect the payment obligations of Spirit or the rights of Spirit without Spirit’s prior written consent; and any waiver
of the terms hereof shall be effective only in the specific instance and for the specific purpose given. 
 Section 7.02
Notices. Unless otherwise expressly specified or permitted by the terms hereof, all notices, requests, demands, authorizations, directions, consents, waivers or documents required or permitted under the terms and provisions of this Agreement
shall be in English and in writing, and given by United States registered or certified mail, courier service or facsimile, and any such notice shall be effective when delivered (or, if delivered by facsimile, upon completion of transmission and
confirmation by the sender (by a telephone call to a representative of the recipient or by machine confirmation) that such transmission was received) addressed as follows: 

If to the Borrower, to: 

WILMINGTON TRUST, NATIONAL ASSOCIATION 

1100 North Market Street 

Wilmington, Delaware 19890-1605 

Attention: Corporate Trust Administration 

Ref.: Spirit 2017-1AA EETC 

Telephone: (302) 636-6387 

Telecopy: (302) 636-4140 

If to the Liquidity Provider, to: 

Commonwealth Bank of Australia, New York Branch 

Attention: Head of Structured Asset Finance 

599 Lexington Avenue 
 New York,
NY 10022 

  

					
		  	28	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 Telephone: (212) 848-9213 

Telecopy: (212) 336-7725 

cc: millej@cba.com.au; erik.doebler@cba.com.au; deborah.tan@dba.com.au 

With a copy to: 
 Commonwealth
Bank of Australia, New York Branch 
 Attention: Teresa Costa/Camille Marcigliano 

599 Lexington Avenue 
 New York,
NY 10022 
 Telephone: (212) 848-9301 

Telecopy: (212) 336-7725 

cc: NY_LoanAdmin@cba.com.au; pdm_saf@cba.com.au 

Any party, by notice to the other party hereto, may designate additional or different addresses for subsequent notices or communications.
Whenever the words “notice” or “notify” or similar words are used herein, they mean the provision of formal notice as set forth in this Section 7.02. 

Section 7.03 No Waiver; Remedies. No failure on the part of the Liquidity Provider to exercise, and no delay in exercising, any
right under this Agreement shall operate as a waiver thereof; nor shall any single or partial exercise of any right under this Agreement preclude any other or further exercise thereof or the exercise of any other right. The remedies herein provided
are cumulative and not exclusive of any remedies provided by law. 
 Section 7.04 Further Assurances. The Borrower agrees to do
such further acts and things and to execute and deliver to the Liquidity Provider such additional assignments, agreements, powers and instruments as the Liquidity Provider may reasonably require or deem advisable to carry into effect the purposes of
this Agreement and the other Operative Agreements or to better assure and confirm unto the Liquidity Provider its rights, powers and remedies hereunder and under the other Operative Agreements. 

Section 7.05 Indemnification; Survival of Certain Provisions. The Liquidity Provider shall be indemnified hereunder to the extent
and in the manner described in Section 4.02 of the Participation Agreements. In addition, the Borrower agrees to indemnify, protect, defend and hold harmless each Liquidity Indemnitee from and against all Expenses of any kind or nature
whatsoever (other than any Expenses of the nature described in Sections 3.01, 3.03, 3.09 or 7.07 or in the Fee Letter (regardless of whether indemnified against pursuant to said Sections or in such Fee Letter)), that may be imposed on or incurred by
such Liquidity Indemnitee, in any way relating to, resulting from, or arising out of or in connection with, any action, suit or proceeding by any third party against such Liquidity Indemnitee and relating to this Agreement, the Fee Letter, the
Intercreditor Agreement or any Participation Agreement; provided, however, that the Borrower shall not be required to indemnify, protect, defend and hold harmless any Liquidity 

  

					
		  	29	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
Indemnitee in respect of any Expense of such Liquidity Indemnitee to the extent such Expense is (i) attributable to the gross negligence or willful misconduct of such Liquidity Indemnitee or
any other Liquidity Indemnitee, (ii) an ordinary and usual operating overhead expense, (iii) attributable to the failure by such Liquidity Indemnitee or any other Liquidity Indemnitee to perform or observe any agreement, covenant or
condition on its part to be performed or observed in this Agreement, the Intercreditor Agreement, the Fee Letter or any other Operative Agreement to which it is a party or (iv) otherwise excluded from the indemnification provisions contained in
Section 4.02 of the Participation Agreements. The provisions of Sections 3.01, 3.03, 3.09, 7.05 and 7.07 and the indemnities contained in Section 4.02 of the Participation Agreements shall survive the termination of this Agreement. 

Section 7.06 Liability of the Liquidity Provider. (a) Neither the Liquidity Provider nor any of its officers, employees or
directors shall be liable or responsible for: (i) the use which may be made of the Advances or any acts or omissions of the Borrower or any beneficiary or transferee in connection therewith; (ii) the validity, sufficiency or genuineness of
documents, or of any endorsement thereon, even if such documents should prove to be in any or all respects invalid, insufficient, fraudulent or forged; or (iii) the making of Advances by the Liquidity Provider against delivery of a Notice of
Borrowing and other documents which do not comply with the terms hereof; provided, however, that the Borrower shall have a claim against the Liquidity Provider, and the Liquidity Provider shall be liable to the Borrower, to the extent
of any damages suffered by the Borrower that were the result of (A) the Liquidity Provider’s willful misconduct or gross negligence in determining whether documents presented hereunder comply with the terms hereof or (B) any breach by
the Liquidity Provider of any of the terms of this Agreement or the Intercreditor Agreement, including, but not limited to, the Liquidity Provider’s failure to make lawful payment hereunder after the delivery to it by the Borrower of a Notice
of Borrowing complying with the terms and conditions hereof. 
 (b) Neither the Liquidity Provider nor any of its officers, employees or
directors or affiliates shall be liable or responsible in any respect for (i) any error, omission, interruption or delay in transmission, dispatch or delivery of any message or advice, however transmitted, in connection with this Agreement or
any Notice of Borrowing delivered hereunder or (ii) any action, inaction or omission which may be taken by it in good faith, absent willful misconduct or negligence (in which event the extent of the Liquidity Provider’s potential liability
to the Borrower shall be limited as set forth in the immediately preceding paragraph), in connection with this Agreement or any Notice of Borrowing. 

Section 7.07 Certain Costs and Expenses. The Borrower agrees promptly to pay, or cause to be paid, (a) the reasonable fees,
expenses and disbursements of Winston & Strawn LLP, special counsel for the Liquidity Provider, in connection with the preparation, negotiation, execution, delivery, filing and recording of the Operative Agreements, any waiver or consent
thereunder or any amendment thereof and (b) if a Liquidity Event of Default occurs, all out-of-pocket expenses incurred by the Liquidity Provider, including
reasonable fees and disbursements of counsel, in connection with such Liquidity Event of Default and any collection, 

  

					
		  	30	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
bankruptcy, insolvency and other enforcement proceedings in connection therewith. In addition, the Borrower shall pay any and all recording, stamp and other similar Taxes and fees payable or
determined to be payable in the United States in connection with the execution, delivery, filing and recording of this Agreement, any other Operative Agreement and such other documents, and agrees to save the Liquidity Provider harmless from and
against any and all liabilities with respect to or resulting from any delay in paying or omission to pay such Taxes or fees. 

Section 7.08 Binding Effect; Participations. (a) This Agreement shall be binding upon and inure to the benefit of the
Borrower and the Liquidity Provider and their respective successors and permitted assigns, except that neither the Liquidity Provider (except as otherwise provided in this Section 7.08) nor (except as contemplated by Section 3.08) the
Borrower shall have the right to assign, pledge or otherwise transfer its rights or obligations hereunder or any interest herein, subject to the Liquidity Provider’s right to grant Participations pursuant to Section 7.08(b). 

(b) The Liquidity Provider agrees that it will not grant any participation (including, without limitation, a “risk participation”)
(any such participation, a “Participation”) in or to all or a portion of its rights and obligations hereunder or under the other Operative Agreements, unless all of the following conditions are satisfied: (i) such
Participation is to a Permitted Transferee, (ii) such Participation is made in accordance with all applicable laws, including, without limitation, the Securities Act of 1933, as amended, the Trust Indenture Act of 1939, as amended, any laws or
regulations imposing U.S. economic sanctions measures or any orders or licenses issued thereunder and any other applicable laws relating to the transfer of similar interests and (iii) such Participation shall not be made under circumstances
that require registration under the Securities Act of 1933, as amended, or qualification of any indenture under the Trust Indenture Act of 1939, as amended. Notwithstanding any such Participation, the Liquidity Provider agrees that (1) the
Liquidity Provider’s obligations under the Operative Agreements shall remain unchanged, and such participant shall have no rights or benefits as against Spirit or the Borrower or under any Operative Agreement, (2) the Liquidity Provider
shall remain solely responsible to the other parties to the Operative Agreements for the performance of such obligations, (3) the Liquidity Provider shall remain the maker of any Advances, and the other parties to the Operative Agreements shall
continue to deal solely and directly with the Liquidity Provider in connection with the Advances and the Liquidity Provider’s rights and obligations under the Operative Agreements, (4) the Liquidity Provider shall be solely responsible for
any withholding Taxes or any filing or reporting requirements relating to such Participation and shall hold the Borrower and Spirit and their respective successors, permitted assigns, affiliates, agents and servants harmless against the same and
(5) neither Spirit nor the Borrower shall be required to pay to the Liquidity Provider any amount under Section 3.01 or Section 3.03 greater than it would have been required to pay had there not been any grant of a Participation by
the Liquidity Provider. The Liquidity Provider may, in connection with any Participation or proposed Participation pursuant to this Section 7.08(b), disclose to the participant or proposed participant any information relating to the Operative
Agreements or to the parties thereto furnished to the Liquidity Provider thereunder or in connection therewith and permitted to be disclosed by the Liquidity Provider; provided, however,


  

					
		  	31	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
that prior to any such disclosure, the participant or proposed participant shall agree in writing for the express benefit of the Borrower and Spirit to preserve the confidentiality of any
confidential information included therein (subject to customary exceptions). 
 The Borrower acknowledges and agrees that the Liquidity
Provider’s source of funds may derive in part from its participants. Accordingly, in determining amounts due by the Borrower to the Liquidity Provider pursuant to Section 3.01 and Section 3.03 of this Agreement, references in this
Agreement to determinations, reserve, liquidity and capital adequacy requirements, increased costs, reduced receipts, additional amounts due pursuant to Section 3.03 as they pertain to the Liquidity Provider shall be deemed also to include
those of each of its participants that are commercial banking institutions and of whose participation the Borrower has been notified, in each case up to the maximum amount that would have been incurred by or attributable to the Liquidity Provider
directly had there not been any grant of a Participation by the Liquidity Provider, and references to the Liquidity Provider therein and in related definitions shall be treated as references to such participants where applicable; provided that in
any event, neither American nor the Borrower shall be required to pay any amount under Section 3.01 or Section 3.03 greater than it would have been required to pay had there not been any grant of a Participation by the Liquidity Provider.

 The Liquidity Provider shall, acting solely for this purpose as a non-fiduciary agent of the
Borrower, maintain a register on which it enters the name and address of each participant and the principal amounts (and stated interest) of each participant’s interest under this Agreement (the “Participant Register”);
provided that the Liquidity Provider shall not have any obligation to disclose all or any portion of the Participant Register (including the identity of any participant or any information relating to a participant’s interest in any
commitments, loans or its other obligations) to any Person except to the extent that such disclosure is necessary to establish that such commitment, loan or other obligation is in registered form under
Section 5f.103-1(c) of the United States Treasury Regulations. The entries in the Participant Register shall be conclusive absent manifest error, and the Liquidity Provider shall treat each Person whose
name is recorded in the Participant Register as the owner of such Participation for all purposes of this Agreement notwithstanding any notice to the contrary. 

(c) Notwithstanding the other provisions of this Section 7.08, the Liquidity Provider may assign and pledge all or any portion of the
Advances owing to it to any Federal Reserve Bank or the United States Treasury as collateral security pursuant to Regulation A of the Board of Governors of the Federal Reserve System and any Operating Circular issued by such Federal Reserve Bank;
provided that any payment in respect of such assigned Advances made by the Borrower to the Liquidity Provider in accordance with the terms of this Agreement shall satisfy the Borrower’s obligations hereunder in respect of such assigned
Advance to the extent of such payment. No such assignment shall release the Liquidity Provider from its obligations hereunder. 

  

					
		  	32	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 Section 7.09 Severability. To the extent permitted by applicable law, any provision
of this Agreement which is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such
prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction. 

Section 7.10 Governing Law. THIS AGREEMENT HAS BEEN DELIVERED IN THE STATE OF NEW YORK AND THIS 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. 

Section 7.11 Submission to Jurisdiction; Waiver of Jury Trial; Waiver of Immunity. (a) Each of the parties hereto, to the
extent it may do so under applicable law, for purposes hereof 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 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. 
 (b) THE BORROWER AND THE LIQUIDITY PROVIDER EACH HEREBY
AGREE TO WAIVE THEIR RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS BETWEEN THEM RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT AND THE RELATIONSHIP THAT IS BEING
ESTABLISHED, including, without limitation, contract claims, tort claims, breach of duty claims and all other common law and statutory claims. The Borrower and the Liquidity Provider each warrant and represent that it has reviewed this waiver with
its legal counsel, and that it knowingly and voluntarily waives its jury trial rights following consultation with such legal counsel. TO THE EXTENT PERMITTED BY APPLICABLE LAW, THIS WAIVER IS IRREVOCABLE, AND CANNOT BE MODIFIED EITHER ORALLY OR IN
WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT. 
 (c) To the
extent that the Liquidity Provider or any of its properties has or may hereafter acquire any right of immunity, whether characterized as sovereign immunity or otherwise, and whether under the United States Foreign Sovereign Immunities Act of 1976
(or any successor legislation) or otherwise, from any legal proceedings, whether in the United States 

  

					
		  	33	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
or elsewhere, to enforce or collect upon this Agreement, including, without limitation, immunity from suit or service of process, immunity from jurisdiction or judgment of any court or tribunal
or execution of a judgment, or immunity of any of its property from attachment prior to any entry of judgment, or from attachment in aid of execution upon a judgment, the Liquidity Provider hereby irrevocably and expressly waives any such immunity,
and agrees not to assert any such right or claim in any such proceeding, whether in the United States or elsewhere. 
 Section 7.12
Counterparts. This Agreement may be executed in any number of counterparts (and each party shall not be required to execute the same counterpart). Each counterpart of this Agreement including a signature page or pages executed by each of the
parties hereto shall be an original counterpart of this Agreement, but all of such counterparts together shall constitute one instrument. 

Section 7.13 Entirety. This Agreement and the Intercreditor Agreement constitute the entire agreement of the parties hereto with
respect to the subject matter hereof and supersede all prior understandings and agreements of such parties. 
 Section 7.14
Headings. The headings of the various Articles and Sections herein and in the Table of Contents hereto are for convenience of reference only and shall not define or limit any of the terms or provisions hereof. 

Section 7.15 Liquidity Provider’s Obligation to Make Advances. EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT,
THE OBLIGATIONS OF THE LIQUIDITY PROVIDER TO MAKE ADVANCES HEREUNDER, AND THE BORROWER’S RIGHTS TO DELIVER NOTICES OF BORROWING REQUESTING THE MAKING OF ADVANCES HEREUNDER, SHALL BE ABSOLUTE, UNCONDITIONAL AND IRREVOCABLE, AND SHALL BE PAID OR
PERFORMED, IN EACH CASE STRICTLY IN ACCORDANCE WITH THE TERMS OF THIS AGREEMENT. 
 Section 7.16 Head Office Obligations. The
Liquidity Provider is Commonwealth Bank of Australia, New York Branch. The Liquidity Provider hereby agrees that, notwithstanding the place of booking or its jurisdiction of incorporation or organization, the obligations of the Liquidity Provider
hereunder are also the obligations of the head office of Commonwealth Bank of Australia in Sydney, Australia (the “Head Office”). Accordingly, any beneficiary of this Agreement will be able to proceed directly against the
Head Office, if the Liquidity Provider defaults in its obligations to such beneficiary under this Agreement. 

  

					
		  	34	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 IN WITNESS WHEREOF, the parties have caused this Agreement to be duly executed and delivered by
their respective officers thereunto duly authorized as of the date first set forth above. 
  

					
	WILMINGTON TRUST, NATIONAL ASSOCIATION, not in its individual capacity but solely as Subordination Agent, as agent and trustee for the Class AA Trust, as Borrower
		
	By:	 	 /s/ Jacqueline Solone

		 	Name: Jacqueline Solone
		 	Title:	 	Vice President
	
	COMMONWEALTH BANK OF AUSTRALIA, NEW YORK BRANCH, as Liquidity Provider
		
	By:	 	 /s/ James M. Miller

		 	Name:	 	James M. Miller
		 	Title:	 	Head of Americas Origination
Structured Asset Finance


 Signature Page 

  

					
		  		  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 ANNEX I to 

REVOLVING CREDIT AGREEMENT 

FORM OF INTEREST ADVANCE NOTICE OF BORROWING 

INTEREST ADVANCE NOTICE OF BORROWING 

The undersigned, a duly authorized signatory of the undersigned borrower (the “Borrower”), hereby certifies to
Commonwealth Bank of Australia, New York Branch (the “Liquidity Provider”), with reference to the Revolving Credit Agreement (2017-1AA), dated as of November 28, 2017, between the
Borrower and the Liquidity Provider (the “Liquidity Agreement”; the terms defined therein and not otherwise defined herein being used herein as therein defined or referenced), that: 

(1) The Borrower is the Subordination Agent under the Intercreditor Agreement. 

(2) The Borrower is delivering this Notice of Borrowing for the making of an Interest Advance by the Liquidity Provider to be
used for the payment of the interest on the Class AA Certificates which is payable on             ,          (the “Distribution
Date”) in accordance with the terms and provisions of the Class AA Trust Agreement and the Class AA Certificates, which Advance is requested to be made on
            ,         . The Interest Advance should be remitted to [insert wire and account details]. 

(3) The amount of the Interest Advance requested hereby (i) is
$            , to be applied in respect of the payment of the interest which is due and payable on the Class AA Certificates on the Distribution Date, (ii) does not include any
amount with respect to the payment of principal of, or premium on, the Class AA Certificates, or principal of, or interest or premium on the Class A Certificates, the Class B Certificates or any Additional Certificates, if issued,
(iii) was computed in accordance with the provisions of the Class AA Certificates, the Class AA Trust Agreement and the Intercreditor Agreement (a copy of which computation is attached hereto as Schedule I), (iv) does not
exceed the Maximum Available Commitment on the date hereof and (v) has not been and is not the subject of a prior or contemporaneous Notice of Borrowing. 

(4) Upon receipt by or on behalf of the Borrower of the amount requested hereby, (a) the Borrower will apply the same in
accordance with the terms of Section 3.05(b) of the Intercreditor Agreement, (b) no portion of such amount shall be applied by the Borrower for any other purpose and (c) no portion of such amount until so applied shall be commingled
with other funds held by the Borrower. 

  

					
		  		  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 The Borrower hereby acknowledges that, pursuant to the Liquidity Agreement, the making of the
Interest Advance as requested by this Notice of Borrowing shall automatically reduce, subject to reinstatement in accordance with the terms of the Liquidity Agreement, the Maximum Available Commitment by an amount equal to the amount of the Interest
Advance requested to be made hereby as set forth in clause (i) of paragraph (3) of this Notice of Borrowing and such reduction shall automatically result in corresponding reductions in the amounts available to be borrowed pursuant to a
subsequent Advance. 
 IN WITNESS WHEREOF, the Borrower has executed and delivered this Notice of Borrowing as of the
        day of             ,             . 

 

			
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Subordination Agent, as Borrower
		
	By:	 	  

		 	Name:
		 	Title:



  

					
		  	I-2	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 SCHEDULE I TO INTEREST ADVANCE NOTICE OF BORROWING 

[Insert Copy of Computations in accordance with Interest Advance Notice of Borrowing] 

  

					
		  	I-3	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 ANNEX II to 

REVOLVING CREDIT AGREEMENT 

FORM OF NON-EXTENSION ADVANCE NOTICE OF BORROWING 

NON-EXTENSION ADVANCE NOTICE OF BORROWING 

The undersigned, a duly authorized signatory of the undersigned subordination agent (the “Borrower”), hereby certifies
to Commonwealth Bank of Australia, New York Branch (the “Liquidity Provider”), with reference to the Revolving Credit Agreement (2017-1AA), dated as of November 28, 2017, between
the Borrower and the Liquidity Provider (the “Liquidity Agreement”; the terms defined therein and not otherwise defined herein being used herein as therein defined or referenced), that: 

(1) The Borrower is the Subordination Agent under the Intercreditor Agreement. 

(2) The Borrower is delivering this Notice of Borrowing for the making of the Non-Extension Advance by
the Liquidity Provider to be used for the funding of the Class AA Cash Collateral Account in accordance with Section 3.05(d) of the Intercreditor Agreement, which Advance is requested to be made on
            ,         . The Non-Extension Advance should be remitted to [insert wire and account details].

 (3) The amount of the Non-Extension Advance requested hereby (i) is
$            , which equals the Maximum Available Commitment on the date hereof and is to be applied in respect of the funding of the Class AA Cash Collateral Account in accordance
with Sections 3.05(d) and 3.05(f) of the Intercreditor Agreement, (ii) does not include any amount with respect to the payment of the principal of, or premium on, the Class AA Certificates, or principal of, or interest or premium on, the
Class A Certificates, the Class B Certificates or any Additional Certificates, if issued, (iii) was computed in accordance with the provisions of the Class AA Certificates, the Liquidity Agreement, the Class AA Trust
Agreement and the Intercreditor Agreement (a copy of which computation is attached hereto as Schedule I) and (iv) has not been and is not the subject of a prior or contemporaneous Notice of Borrowing under the Liquidity Agreement. 

(4) Upon receipt by or on behalf of the Borrower of the amount requested hereby, (a) the Borrower will deposit such amount in the
Class AA Cash Collateral Account and apply the same in accordance with the terms of Sections 3.05(d) and 3.05(f) of the Intercreditor Agreement, (b) no portion of such amount shall be applied by the Borrower for any other purpose and
(c) no portion of such amount until so applied shall be commingled with other funds held by the Borrower. 

  

					
		  		  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 The Borrower hereby acknowledges that, pursuant to the Liquidity Agreement, (A) the making
of the Non-Extension Advance as requested by this Notice of Borrowing shall automatically and irrevocably terminate the obligation of the Liquidity Provider to make further Advances under the Liquidity
Agreement and (B) following the making by the Liquidity Provider of the Non-Extension Advance requested by this Notice of Borrowing, the Borrower shall not be entitled to request any further Advances
under the Liquidity Agreement. 
 IN WITNESS WHEREOF, the Borrower has executed and delivered this Notice of Borrowing as of the
             day of              ,         . 

 

			
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Subordination Agent, as Borrower
		
	By:	 	  

		 	Name:
		 	Title:



  

					
		  	II-2	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 SCHEDULE I TO NON-EXTENSION ADVANCE NOTICE OF BORROWING

 [Insert Copy of computations in accordance with Non-Extension Advance Notice of Borrowing] 

  

					
		  	II-3	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 ANNEX III to 

REVOLVING CREDIT AGREEMENT 

FORM OF DOWNGRADE ADVANCE NOTICE OF BORROWING 

DOWNGRADE ADVANCE NOTICE OF BORROWING 

The undersigned, a duly authorized signatory of the undersigned subordination agent (the “Borrower”), hereby certifies
to Commonwealth Bank of Australia, New York Branch (the “Liquidity Provider”), with reference to the Revolving Credit Agreement (2017-1AA), dated as of November 28, 2017, between
the Borrower and the Liquidity Provider (the “Liquidity Agreement”; the terms defined therein and not otherwise defined herein being used herein as therein defined or referenced), that: 

(1) The Borrower is the Subordination Agent under the Intercreditor Agreement. 

(2) The Borrower is delivering this Notice of Borrowing for the making of the Downgrade Advance by the Liquidity Provider to be used for the
funding of the Class AA Cash Collateral Account in accordance with Section 3.05(c)(iii) of the Intercreditor Agreement by reason of the Liquidity Facility provided under the Liquidity Agreement becoming a Downgraded Facility which has not
been replaced by a Replacement Liquidity Facility, which Advance is requested to be made on             ,         . The Downgrade Advance should be
remitted to [insert wire and account details]. 
 (3) The amount of the Downgrade Advance requested hereby (i) is
$            , which equals the Maximum Available Commitment on the date hereof and is to be applied in respect of the funding of the Class AA Cash Collateral Account in accordance
with Sections 3.05(c) and 3.05(f) of the Intercreditor Agreement, (ii) does not include any amount with respect to the payment of the principal of, or premium on, the Class AA Certificates, or principal of, or interest or premium on, the
Class A Certificates, the Class B Certificates or any Additional Certificates, if issued, (iii) was computed in accordance with the provisions of the Class AA Certificates, the Class AA Trust Agreement and the Intercreditor
Agreement (a copy of which computation is attached hereto as Schedule I) and (iv) has not been and is not the subject of a prior or contemporaneous Notice of Borrowing under the Liquidity Agreement. 

(4) Upon receipt by or on behalf of the Borrower of the amount requested hereby, (a) the Borrower will deposit such amount in the
Class AA Cash Collateral Account and apply the same in accordance with the terms of Sections 3.05(c) and 3.05(f) of the Intercreditor Agreement, (b) no portion of such amount shall be applied by the Borrower for any other purpose and
(c) no portion of such amount until so applied shall be commingled with other funds held by the Borrower. 

  

					
		  		  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 The Borrower hereby acknowledges that, pursuant to the Liquidity Agreement, (A) the making
of the Downgrade Advance as requested by this Notice of Borrowing shall automatically reduce, subject to reinstatement in accordance with the terms of the Liquidity Agreement, the Maximum Available Commitment to zero and (B) following the
making by the Liquidity Provider of the Downgrade Advance requested by this Notice of Borrowing, subject to reinstatement in accordance with the terms of the Liquidity Agreement, the Borrower shall not be entitled to request any further Advances
under the Liquidity Agreement. 
 IN WITNESS WHEREOF, the Borrower has executed and delivered this Notice of Borrowing as of the
             day of             ,         . 

 

			
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Subordination Agent, as Borrower
		
	By:	 	  

		 	Name:
		 	Title:



  

					
		  	III-2	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 SCHEDULE I TO DOWNGRADE ADVANCE NOTICE OF BORROWING 

[Insert Copy of computations in accordance with Downgrade Advance Notice of Borrowing] 

  

					
		  	III-3	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 ANNEX IV to 

REVOLVING CREDIT AGREEMENT 

FORM OF FINAL ADVANCE NOTICE OF BORROWING 

FINAL ADVANCE NOTICE OF BORROWING 

The undersigned, a duly authorized signatory of the undersigned borrower (the “Borrower”), hereby certifies to
Commonwealth Bank of Australia, New York Branch (the “Liquidity Provider”), with reference to the Revolving Credit Agreement (2017-1AA), dated as of November 28, 2017, between the
Borrower and the Liquidity Provider (the “Liquidity Agreement”; the terms defined therein and not otherwise defined herein being used herein as therein defined or referenced), that: 

(1) The Borrower is the Subordination Agent under the Intercreditor Agreement. 

(2) The Borrower is delivering this Notice of Borrowing for the making of the Final Advance by the Liquidity Provider to be
used for the funding of the Class AA Cash Collateral Account in accordance with Section 3.05(i) of the Intercreditor Agreement by reason of the receipt by the Borrower of a Termination Notice from the Liquidity Provider with respect to the
Liquidity Agreement, which Advance is requested to be made on             ,         . The Final Advance should be remitted to [insert wire and
account details]. 
 (3) The amount of the Final Advance requested hereby (i) is
$            , which equals the Maximum Available Commitment on the date hereof and is to be applied in respect of the funding of the Class AA Cash Collateral Account in accordance
with Sections 3.05(f) and 3.05(i) of the Intercreditor Agreement, (ii) does not include any amount with respect to the payment of principal of, or premium on, the Class AA Certificates, or principal of, or interest or premium on, the
Class A Certificates, the Class B Certificates or any Additional Certificates, if issued, (iii) was computed in accordance with the provisions of the Class AA Certificates, the Class AA Trust Agreement and the Intercreditor
Agreement (a copy of which computation is attached hereto as Schedule I) and (iv) has not been and is not the subject of a prior or contemporaneous Notice of Borrowing. 

(4) Upon receipt by or on behalf of the Borrower of the amount requested hereby, (a) the Borrower will deposit such amount
in the Class AA Cash Collateral Account and apply the same in accordance with the terms of Sections 3.05(f) and 3.05(i) of the Intercreditor Agreement, (b) no portion of such amount shall be applied by the Borrower for any other purpose
and (c) no portion of such amount until so applied shall be commingled with other funds held by the Borrower. 

  

					
		  		  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 The Borrower hereby acknowledges that, pursuant to the Liquidity Agreement, (A) the making
of the Final Advance as requested by this Notice of Borrowing shall automatically and irrevocably terminate the obligation of the Liquidity Provider to make further Advances under the Liquidity Agreement and (B) following the making by the
Liquidity Provider of the Final Advance requested by this Notice of Borrowing, the Borrower shall not be entitled to request any further Advances under the Liquidity Agreement. 

IN WITNESS WHEREOF, the Borrower has executed and delivered this Notice of Borrowing as of the
         day of             ,         . 

 

			
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Subordination Agent, as Borrower
		
	By:	 	  

		 	Name:
		 	Title:


 [* Bracketed language may be included at Borrower’s option.] 

  

					
		  	IV-2	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 SCHEDULE 1 TO FINAL ADVANCE NOTICE OF BORROWING 

[Insert Copy of Computations in accordance with Final Advance Notice of Borrowing] 

  

					
		  	IV-3	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 ANNEX V to 

REVOLVING CREDIT AGREEMENT 
 FORM
OF SPECIAL TERMINATION 
 ADVANCE NOTICE OF BORROWING 

SPECIAL TERMINATION ADVANCE NOTICE OF BORROWING 

The undersigned, a duly authorized signatory of the undersigned borrower (the “Borrower”), hereby certifies to
Commonwealth Bank of Australia, New York Branch (the “Liquidity Provider”), with reference to the Revolving Credit Agreement (2017-1AA), dated as of November 28, 2017, between the
Borrower and the Liquidity Provider (the “Liquidity Agreement”; the terms defined therein and not otherwise defined herein being used herein as therein defined or referenced), that: 

(1) The Borrower is the Subordination Agent under the Intercreditor Agreement. 

(2) The Borrower is delivering this Notice of Borrowing for the making of the Special Termination Advance by the Liquidity
Provider to be used for the funding of the Class AA Cash Collateral Account in accordance with Section 3.05(k) of the Intercreditor Agreement by reason of the receipt by the Borrower of a Special Termination Notice from the Liquidity
Provider with respect to the Liquidity Agreement, which Advance is requested to be made on             . 

(3) The amount of the Special Termination Advance requested hereby (i) is
$            , which equals the Maximum Available Commitment on the date hereof and is to be applied in respect of the funding of the Class AA Cash Collateral Account in accordance
with Sections 3.05(f) and 3.05(k) of the Intercreditor Agreement, (ii) does not include any amount with respect to the payment of principal of, or premium on, the Class AA Certificates, or principal of, or interest or premium on, the
Class A Certificates, the Class B Certificates or any Additional Certificates, if issued, (iii) was computed in accordance with the provisions of the Class AA Certificates, the Class AA Trust Agreement and the Intercreditor
Agreement (a copy of which computation is attached hereto as Schedule I) and (iv) has not been and is not the subject of a prior or contemporaneous Notice of Borrowing. 

(4) Upon receipt by or on behalf of the Borrower of the amount requested hereby, (a) the Borrower shall deposit such
amount in the Class AA Cash Collateral Account and apply the same in accordance with the terms of Sections 3.05(f) and 3.05(k) of the Intercreditor Agreement, (b) no portion of such amount shall be applied by the


  

					
		  		  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
Borrower for any other purpose and (c) no portion of such amount until so applied shall be commingled with other funds held by the Borrower. 

The Borrower hereby acknowledges that, pursuant to the Liquidity Agreement, (A) the making of the Special Termination Advance as
requested by this Notice of Borrowing shall automatically and irrevocably terminate the obligation of the Liquidity Provider to make further Advances under the Liquidity Agreement; and (B) following the making by the Liquidity Provider of the
Special Termination Advance requested by this Notice of Borrowing, the Borrower shall not be entitled to request any further Advances under the Liquidity Agreement. 

IN WITNESS WHEREOF, the Borrower has executed and delivered this Notice of Borrowing as of the
         day of             ,         . 

 

			
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Subordination Agent, as Borrower
		
	By:	 	  

		 	Name:
		 	Title:



  

					
		  	V-2	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 SCHEDULE 1 TO SPECIAL TERMINATION ADVANCE NOTICE OF BORROWING 

[Insert Copy of Computations in accordance with Special Termination Advance Notice of Borrowing] 

  

					
		  	V-3	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 ANNEX VI to 

REVOLVING CREDIT AGREEMENT 

FORM OF NOTICE OF TERMINATION 

NOTICE OF TERMINATION 

[Date] 
 Wilmington Trust,
National Association, 
 as Subordination Agent, 

as Borrower 
 1100 North Market Street 

Wilmington, Delaware 19890-1605 
 Reference: Spirit Airlines 2017-1AA EETC 
 Attention: Corporate Trust Administration – Jacqueline Solone 

Telephone: (302) 636-6387 

Facsimile: (302) 636-4140 
  

	Re:	Revolving Credit Agreement (2017-1AA), dated as of November 28, 2017, between Wilmington Trust, National Association, as Subordination Agent, as agent and trustee for the
Spirit Airlines Pass Through Trust 2017-1AA, as Borrower, and Commonwealth Bank of Australia, New York Branch (the “Liquidity Agreement”) 


Ladies and Gentlemen: 
 You are hereby notified
that pursuant to Section 6.01(a) of the Liquidity Agreement, by reason of the occurrence and continuance of a Liquidity Event of Default and the existence of a Performing Note Deficiency (each as defined in the Liquidity Agreement), we are
giving this notice to you in order to cause (i) our obligations to make Advances (as defined in the Liquidity Agreement) under such Liquidity Agreement to terminate on the fifth Business Day after the date on which you receive this notice and
(ii) you to request a Final Advance under the Liquidity Agreement pursuant to Section 2.02(c) of the Liquidity Agreement and Section 3.05(i) of the Intercreditor Agreement (as defined in the Liquidity Agreement) as a consequence of
your receipt of this notice. 

  

					
		  		  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 THIS NOTICE IS THE “NOTICE OF TERMINATION” PROVIDED FOR UNDER THE LIQUIDITY
AGREEMENT. OUR OBLIGATIONS TO MAKE ADVANCES UNDER THE LIQUIDITY AGREEMENT WILL TERMINATE ON THE FIFTH BUSINESS DAY AFTER THE DATE ON WHICH YOU RECEIVE THIS NOTICE. 

 

			
	Very truly yours,
	
	COMMONWEALTH BANK OF AUSTRALIA, NEW YORK BRANCH,
	as Liquidity Provider
		
	By:	 	  

		 	Name:
		 	Title:


  

	cc:	Wilmington Trust, National Association, as Class AA Trustee 

 Spirit Airlines, Inc. 

  

					
		  	VI-2	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 ANNEX VII to 

REVOLVING CREDIT AGREEMENT 

FORM OF NOTICE OF SPECIAL TERMINATION 

NOTICE OF SPECIAL TERMINATION 

[Date] 
 Wilmington Trust, National Association,

 as Subordination Agent, 
 as
Borrower 
 1100 North Market Street 
 Wilmington, Delaware
19890-1605 
 Reference: Spirit Airlines 2017-1AA EETC 

Attention: Corporate Trust Administration – Jacqueline Solone 

Telephone: (302) 636-6387 

Facsimile: (302) 636-4140 
  

	Re:	Revolving Credit Agreement (2017-1AA), dated as of November 28, 2017, between Wilmington Trust, National Association, as Subordination Agent, as agent and trustee for the
Spirit Airlines Pass Through Trust 2017-1AA, as Borrower, and Commonwealth Bank of Australia, New York Branch (the “Liquidity Agreement”) 


Ladies and Gentlemen: 
 You are hereby notified
that pursuant to Section 6.01(b) of the Liquidity Agreement, by reason of the aggregate Pool Balance of the Class AA Certificates exceeding the aggregate outstanding principal amount of the Series AA Equipment Notes (other than any
Series AA Equipment Notes previously sold or with respect to which the Aircraft related to such Series AA Equipment Notes has been disposed of) during the 18-month period prior to February 15,
2030, we are giving this notice to you in order to cause (i) our obligations to make Advances (as defined in the Liquidity Agreement) under such Liquidity Agreement to terminate on the fifth Business Day after the date on which you receive this
notice and (ii) you to request a Special Termination Advance under the Liquidity Agreement pursuant to Section 2.02(d) of the Liquidity Agreement and Section 3.05(k) of the Intercreditor Agreement (as defined in the Liquidity
Agreement) as a consequence of your receipt of this notice. 

  

					
		  		  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 THIS NOTICE IS THE “NOTICE OF SPECIAL TERMINATION” PROVIDED FOR UNDER THE LIQUIDITY
AGREEMENT. OUR OBLIGATIONS TO MAKE ADVANCES UNDER THE LIQUIDITY AGREEMENT WILL TERMINATE ON THE FIFTH BUSINESS DAY AFTER THE DATE ON WHICH YOU RECEIVE THIS NOTICE. 

 

			
	Very truly yours,
	
	COMMONWEALTH BANK OF AUSTRALIA, NEW YORK BRANCH,
	as Liquidity Provider
		
	By:	 	  

		 	Name:
		 	Title:


  

	cc:	Wilmington Trust, National Association, as Class AA Trustee 

 Spirit Airlines, Inc. 

  

					
		  	VII-2	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 ANNEX VIII to 

REVOLVING CREDIT AGREEMENT 

FORM OF NOTICE OF REPLACEMENT SUBORDINATION AGENT 

NOTICE OF REPLACEMENT SUBORDINATION AGENT 

[Date] 
 Attention: 

 

	Re:	Revolving Credit Agreement (2017-1AA), dated as of November 28, 2017, between Wilmington Trust, National Association, as Subordination Agent, as agent and trustee for the
Spirit Airlines Pass Through Trust 2017-1AA, as Borrower, and Commonwealth Bank of Australia, New York Branch (the “Liquidity Agreement”) 


Ladies and Gentlemen: 
 For value received, the
undersigned beneficiary hereby irrevocably transfers to: 
 [Name of Transferee] 

[Address of Transferee] 
 all rights and
obligations of the undersigned as Borrower under the Liquidity Agreement referred to above. The transferee has succeeded the undersigned as Subordination Agent under the Intercreditor Agreement referred to in the first paragraph of the Liquidity
Agreement, pursuant to the terms of Section 7.01 of the Intercreditor Agreement. 
 By this transfer, all rights of the undersigned as
Borrower under the Liquidity Agreement are transferred to the transferee and the transferee shall hereafter have the sole rights and obligations as Borrower thereunder. The undersigned shall pay any costs and expenses of such transfer, including,
but not limited to, transfer taxes or governmental charges. 
 This transfer shall be effective as of [specify time and date]. 

  

					
		  	VIII-1	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)









 
			
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Subordination Agent, as Borrower
		
	By:	 	  

		 	Name:
		 	Title:



  

					
		  	VIII-2	  	 Revolving Credit Agreement (Class AA)

(Spirit 2017-1 EETC)