Document:

Exhibit 10.6

 

CERTAIN IDENTIFIED INFORMATION HAS BEEN EXCLUDED FROM THE EXHIBIT BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) WOULD BE COMPETITIVELY
HARMFUL IF PUBLICLY DISCLOSED. OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.

 

SUPPLEMENTAL AGREEMENT NO. 1 to

 

PURCHASE AGREEMENT NUMBER 04761

 

between

 

THE BOEING COMPANY

 

and

 

United
Airlines, Inc.

 

relating to

 

Boeing
Model 737 MAX Aircraft

 

THIS SUPPLEMENTAL AGREEMENT
No. 1 (SA-1) is entered into as of September 25, 2018 by and between The Boeing Company, a Delaware corporation,
(Boeing) and United Airlines, Inc., a Delaware corporation, (Customer);

 

Customer and Boeing entered
into Purchase Agreement No. 04761 dated as of the 15th day of May of 2018 as amended and supplemented (Purchase
Agreement), relating to the purchase and sale of Model 737 MAX aircraft. This Supplemental Agreement is an amendment to the
Purchase Agreement;

 

WHEREAS, Customer and Boeing
have agreed to the addition of the following into the Purchase Agreement:

 

		(i)	One *** 737-10 *** Aircraft into the Purchase
                                            Agreement; and

 

WHEREAS, Customer and Boeing
have agreed to the addition of the following into the Purchase Agreement:

 

		(i)	The addition of *** 737-9 Aircraft into
                                            the Purchase Agreement, as incorporated in the following additions to the Purchase Agreement:

 

		a.	737-9 Aircraft Information Table;

		b.	An exhibit regarding the configuration of
                                            the 737-9 Aircraft;

		c.	A supplemental exhibit concerning BFE variables;

		d.	A revision of a letter agreement to add
                                            the *** considerations applicable to the 737-9 Aircraft;

		e.	A letter agreement specifying *** for the
                                             737-9 Aircraft;

		f.	A letter agreement specifying an *** regime
                                            for 737-9 Aircraft; and

 

		(ii)	A *** in the event of a *** for 737-10
                                            Aircraft into the Purchase Agreement;

 

	UAL-PA-04761	SA-1, Page 1
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

NOW THEREFORE, in consideration
of the mutual covenants herein contained, the parties agree to amend the Purchase Agreement as follows:

 

		1.	Table of Contents.

 

The “Table of Contents”
is deleted in its entirety and replaced with the attached “Table of Contents” (identified by “SA-1”).

 

		2.	Tables.

 

Table 1 entitled “737-***
Aircraft Delivery, Description, Price and ***” (identified by “SA-1”) is added to the Purchase Agreement to incorporate
the *** 737-*** Aircraft.

 

		3.	Exhibit and Supplemental Exhibit.

 

3.1.          Exhibit A
entitled “737-9 Aircraft Configuration” (identified by “SA-1”) is added to the Purchase Agreement to incorporate
configuration data for the *** 737-9 Aircraft.

 

3.2.          Supplemental
Exhibit BFE1 entitled “BFE Variables for the 737-9 Aircraft” (identified by “SA-1”) is added to the Purchase
Agreement to incorporate BFE data for the *** 737-9 Aircraft.

 

		4.	Letter Agreements.

 

4.1.         Letter
Agreement No. UAL-PA-04761-LA-l801467 previously entitled “Special Matters - 737-10 MAX Aircraft” is deleted in its
entirety and is replaced by Letter Agreement No. UAL-PA-04761-LA-l801467R1 entitled “Special Matters - 737-10 Aircraft and
737-9 Aircraft” (identified by “SA-1”) is added to the Purchase Agreement to add certain 737-9 Aircraft *** considerations.

 

4.2.       Letter
Agreement No. UAL-PA-04761-LA-l807022 entitled “737-10 *** Aircraft” (identified by “SA-1”) is added to
the Purchase Agreement to incorporate 737-10 *** Aircraft.

 

4.3.         Letter
Agreement No. UAL-PA-04761-LA-l807049 entitled “***” (identified by “SA-1”) is added to the Purchase Agreement
to incorporate the defined remedy in the *** for 737-10 Aircraft.

 

4.4.        Letter
Agreement No. UAL-PA-04761-LA-l807420 entitled “737-9 Aircraft Model ***” (identified by “SA-1”) is added
to the Purchase Agreement to incorporate certain *** for the 737-9 Aircraft.

 

4.5.         Letter
Agreement No. UAL-PA-04761-LA-l807490 entitled “737-9 Aircraft ***” (identified by “SA-1”) is added to the
Purchase Agreement to incorporate the *** for the 737-9 Aircraft.

 

	UAL-PA-04761	SA-1, Page 2 
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

		5.	Miscellaneous.

 

5.1.         The
parties mutually agree that the terms of Letter Agreement UAL-PA-03776-LA-1208123R1 entitled “*** for 737-9 Aircraft” apply
to the *** 737-9 Aircraft.

 

5.2.         References:

 

5.2.1.       Table
1 entitled “737-*** Aircraft Delivery, Description, Price and ***” and Table 1 entitled “737-*** Aircraft Delivery, Description,
Price and ***” are individually and collectively referred to as Table 1 in the Purchase Agreement.

 

5.2.2.       Exhibit A
entitled “737-10 Configuration” and Exhibit A entitled “737-9 Configuration” are individually and collectively
referred to as Exhibit A in the Purchase Agreement.

 

5.2.3.       Supplemental
Exhibit BFE1 entitled “BFE Variables 737-10 Aircraft” and Supplemental Exhibit BFE1 entitled “BFE Variables
737-9 Aircraft” are individually and collectively referred to as Supplemental Exhibit BFE1 in the Purchase Agreement.

 

5.2.4.       If
Boeing or Customer determines that the references and deemed inclusions described in section 5.1 of this Supplemental Agreement No. 1
should be further amended, then Boeing and Customer will work together for a mutually agreeable solution.

 

5.3.         Boeing
and Customer agree that *** under this Supplemental Agreement No. 1. Such *** will be *** by no later than ***.

 

[The rest of the page is intentionally
blank. Signature page follows.]

 

	UAL-PA-04761	SA-1, Page 3 
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

EXECUTED IN DUPLICATE as of the day and year first written above.

 

	THE
    BOEING COMPANY	 	UNITED
    AIRLINES, INC.
	 	 	 
	 	 	 
	/s/
    Irma L. Krueger	 	/s/
    Gerald Laderman
	Signature	 	Signature
	 	 	 
	 	 	 
	Irma
    L. Krueger	 	Gerald
    Laderman
	Printed
    Name	 	Printed
    Name
	 	 	 
	 

    

    Attorney-in-Fact
	 	 

    Executive Vice President and

    Chief Financial Officer

	Title	 	Title

 

	UAL-PA-04761	SA-1, Page 4 
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

TABLE OF CONTENTS

 

	

    ARTICLES	SA

    NUMBER
	 	 	 
	   Article 1.	Quantity,
    Model and Description	 
	 	 	 
	   Article 2.	Delivery
    Schedule	 
	 	 	 
	   Article 3.	Price	 
	 	 	 
	   Article 4.	Payment	 
	 	 	 
	   Article 5.	Additional
    Terms	 
	 	 	 
	TABLE	 
	 	 
	    1.	737-***
    Aircraft Delivery, Description, Price and ***	 
	 	 	 
	    1.	737-***
    Aircraft Delivery, Description, Price and ***	SA-1
	 	 	 
	EXHIBITS	 
	 	 
	    A	737-10
    Aircraft Configuration	 
	 	 	 
	    A	737-9
    Aircraft Configuration	SA-1
	 	 	 
	    B.	Aircraft
    Delivery Requirements and Responsibilities	 
	 	 	 
	SUPPLEMENTAL
    EXHIBITS	 
	 	 
	    AE1.	***/Airframe
    and *** Features for the 737MAX Aircraft	 
	 	 	 
	    BFE1.	BFE
    Variables 737-10 Aircraft	 
	 	 	 
	    BFE1.	BFE
    Variables 737-9 Aircraft	SA-1
	 	 	 
	    EE1.	Engine
    Warranty ***	 
	 	 	 
	    SLP1.	Service
    Life Policy Components	 
	

 

	UAL-PA-04761	Table of Contents, Page 1 of 3	SA-1
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

	TABLE OF CONTENTS, CONTINUED

	 	 
	

    LETTER AGREEMENTS	SA

    NUMBER
	 	 
	UAL-PA-04761-LA-1801463	***
    Matters	 
	 	 	 
	UAL-PA-04761-LA-1801464	Demonstration
    Flight Waiver	 
	 	 	 
	UAL-PA-04761-LA-1801465	Open
    Matters 737-10 Aircraft	 
	 	 	 
	UAL-PA-04761-LA-1801466	Seller
    Purchased Equipment	 
	 	 	 
	UAL-PA-04761-LA-1801467R1	Special
    Matters – 737-10 Aircraft and 737-9 Aircraft	SA-1
	 	 	 
	UAL-PA-04761-LA-1801468	***	 
	 	 	 
	UAL-PA-04761-LA-1801469	***	 
	 	 	 
	UAL-PA-04761-LA-1801470	Privileged
    and Confidential Matters	 
	 	 	 
	UAL-PA-04761-LA-1801471	AGTA
    Matters	 
	 	 	 
	UAL-PA-04761-LA-1801472	Assignment
    Matters	 
	 	 	 
	UAL-PA-04761-LA-1801473	737-10
    Aircraft ***	 
	 	 	 
	UAL-PA-04761-LA-1801474	***
    for the 737-10 Aircraft	 
	 	 	 
	UAL-PA-04761-LA-1801475	Loading
    of Customer Software	 
	 	 	 
	UAL-PA-04761-LA-1801476	Installation
    of Cabin Systems Equipment	 
	 	 	 
	UAL-PA-04761-LA-1801477	Special
    Customer Support Matters 	 
	 	 	 
	UAL-PA-04761-LA-1801478	Delivery
    *** Matters	 
	 	 	 
	UAL-PA-04761-LA-1807022	737-10
    *** Aircraft	SA-1
	 	 	 
	UAL-PA-04761-LA-1807049	***
    for 737-10 Aircraft	SA-1
	 	 	 
	UAL-PA-04761-LA-1807420	737-9
    Aircraft Model ***	SA-1
	 	 	 
	UAL-PA-04761-LA-1807490	737-9
    Aircraft ***	SA-1

 

	SUPPLEMENTAL
    AGREEMENTS	DATED
    AS OF
	 	 
	Supplemental
    Agreement No. 1 	           September 25,
2018

 

	UAL-PA-04761	Table of Contents, Page 2 of 3	SA-1
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

Table 1 to Purchase Agreement
No. 04761

*** 737-*** Aircraft
Delivery, Description, Price and ***

 

	Airframe Model/MTOW:	737-***	*** pounds	 	Detail Specification:	***	
	 	 	 	 	 	 	 
	Engine Model/Thrust:	***	*** pounds	+	Airframe Price Base Year/*** Formula:	***	***
	Airframe Price:	 	$***	 	Engine Price Base Year/*** Formula:	***	***
	*** Features:	$***	 	 	 	 
	Sub-Total of Airframe and Features:	$***	 	Airframe *** Data:	 	 
	Engine Price (Per Aircraft):	$***	 	Base Year Index (ECI):	***	 
	Aircraft Basic Price (Excluding BFE/SPE):	$***	 	Base Year Index (CPI):	***	 
	Buyer Furnished Equipment (BFE) Estimate:	$***	 	 	 	 
	Seller Purchased Equipment (SPE) Estimate:	$***	 	 	 	 
	 	 	 	 	 	 	 
	Deposit per Aircraft:	$***	 	 	 	 

 

	#
    of Aircraft	Delivery
    Date	 	***	Manufacturer
    Serial Number	 	***
    Estimate	***
    Per Aircraft (Amts. Due/*** Prior to Delivery):
	Number
    of 	Factor	Actual
    or Nominal	***
    Base	***	***	***	***
	Aircraft	(Airframe)	Delivery
    ***	Price
    Per A/P	***	***	***	***
	***	***	***	***	***	***	***	***	***	***	***
	 	Total:	***	 	 	 	 	 	 	 	 

 

* Nominal delivery *** pursuant to §2
of the Purchase Agreement.

 

Note: Serial Numbers are not yet available
but even when provided will be provided as guidance only and are subject to change until delivery.

 

+ - Subject to confirmation
by engine manufacturer 

 

	UAL-PA-04761 APR: 112125.TXT	SA-1, Table 1 MAX***, Page 1 
	Boeing / United Airlines, Inc. Proprietary

    

    

    

 

AIRCRAFT CONFIGURATION

 

between

 

THE BOEING COMPANY

 

and

 

United Airlines, Inc.

 

Exhibit A
to Purchase Agreement Number PA-04761 for 737-9 Aircraft

 

	UAL-PA-04761-EXA	SA-1
	 	Page 1

BOEING/UNITED AIRLINES, INC.
PROPRIETARY

    

    

    

 

Exhibit A-1

 

AIRCRAFT CONFIGURATION

 

relating to

 

BOEING MODEL 737-9 AIRCRAFT

 

The Detail Specification
is Boeing document number *** Such Detail Specification will be comprised of *** document number ***, dated ***, as amended to incorporate
the *** features *** listed below, including ***. As soon as practicable, Boeing will furnish to Customer copies of the Detail Specification,
which copies will reflect such ***. The Aircraft Basic Price reflects and includes all effects of such ***, except such Aircraft Basic
Price does not include the price effects of any Buyer Furnished Equipment or In-Flight Entertainment.

 

	UAL-PA-04761-EXA	SA-1
	 	Page 2

BOEING/UNITED AIRLINES, INC.
PROPRIETARY

    

    

    

 

	***
    Number	Title	737-9
    Aircraft 

*** Price Per

 A/C
	***	***	***
	***	TOTALS:	***

 

	UAL-PA-04761-EXA	SA-1
	 	Page 3

BOEING/UNITED AIRLINES, INC.
PROPRIETARY

    

    

    

 

BUYER FURNISHED
EQUIPMENT VARIABLES

 

between

 

THE BOEING COMPANY

 

and

 

UNITED AIRLINES, INC.

 

Supplemental
Exhibit BFE1

to Purchase Agreement
Number 04761

for 737-9 Aircraft

 

	UAL-PA-04761-Ex BFE1	BFE1 Page 1	SA-1
	 	BOEING / UNITED AIRLINES, INC. PROPRIETARY	 

    

    

    

 

BUYER FURNISHED EQUIPMENT VARIABLES

 

relating to

 

BOEING MODEL 737-9 AIRCRAFT

 

This Supplemental Exhibit BFE1
contains supplier selection dates, on-dock dates and other requirements applicable to the Aircraft.

 

	1.	Supplier Selection.

 

Customer will:

 

Select and notify Boeing
of the suppliers and part numbers of the following BFE items by the following dates:

 

***

 

Note: This Supplemental Exhibit BFE1
should be revised if a new 737-9 Aircraft configurations is created.

 

	UAL-PA-04761-Ex BFE1	BFE1 Page 2	SA-1
	 	BOEING / UNITED AIRLINES, INC. PROPRIETARY	 

    

    

    

 

	2.	On-dock Dates and Other Information.

 

On or before ***, Boeing
will provide to Customer the BFE Requirements electronically through My Boeing Fleet (MBF in My Boeing Configuration (MBC).
These requirements may be periodically revised, setting forth the items, quantities, on-dock dates and shipping instructions and other
requirements relating to the in-sequence installation of BFE. For planning purposes, preliminary BFE on-dock dates are set forth in Attachment
1:

 

	3.	Additional Delivery Requirements
- Import.

 

Customer will be the “importer
of record” (as defined by the U.S. Customs and Border Protection) for all BFE imported into the United States, and as such,
it has the responsibility to ensure all of Customer’s BFE shipments comply with U.S. Customs Service regulations. In the event
Customer requests Boeing, in writing, to act as importer of record for Customer’s BFE, and Boeing agrees to such request, Customer
is responsible for ensuring Boeing can comply with all U.S. Customs Import Regulations by making certain that, at the time of shipment,
all BFE shipments comply with the requirements in the “International Shipment Routing Instructions”, including the Customs
Trade Partnership Against Terrorism (C-TPAT), as set out on the Boeing website referenced below. Customer agrees to include the
International Shipment Routing Instructions, including C-TPAT requirements, in each contract between Customer and BFE supplier.

 

	UAL-PA-04761-Ex BFE1	BFE1 Page 3	SA-1
	 	BOEING / UNITED AIRLINES, INC. PROPRIETARY	 

    

    

    

 

ATTACHMENT
1 TO SUPPLEMENTAL EXHIBIT BFE1 TO PURCHASE AGREEMENT NO. 04761

Preliminary On Dock Date Data: *** MAX *** AIRCRAFT

 

	***	***	***	***	***	***	***	***	***	***	***	***
	***	***	***	***	***	***	***	***	***	***	***	***
	***	***	 	 	 	 	 	 	 	 	 	 

 

	Attachment
1 to Supplemental Exhibit BFE1

UAL-PA-04761-Ex BFE1	 	BFE1 Page 1
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

		The Boeing Company

    P.O. Box 3707

    Seattle, WA 98124-2207

 

 

UAL-PA-04761-LA-1801467R1

 

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

		Subject:	Special Matters – 737-10 Aircraft
                                            and 737-9 Aircraft

 

		Reference:	Purchase Agreement No.  04761 (Purchase
                                            Agreement) between The Boeing Company (Boeing) and United Airlines, Inc.
                                            (Customer) relating to Model 737 MAX aircraft (Aircraft)

 

This
letter agreement (Letter Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter
Agreement shall have the same meaning as in the Purchase Agreement. This Letter Agreement supersedes and replaces in its entirety Letter
Agreement UAL-PA-04761-LA-1801467.

 

1.             ***.

 

1.1             737-10
***.

 

At the time of delivery of
each 737-10 Aircraft, Boeing *** to Customer a *** the 737-10 ***which shall equal *** (737-10 ***).

 

1.2             ***.

 

At the time of delivery of
the ***

 

1.3             737-9
Aircraft ***.

 

At the time of delivery of
each 737-9 Aircraft, Boeing *** to Customer a *** 737-9 Aircraft ***.

 

1.4             737-9
Aircraft ***.

 

At the time of delivery of
each 737-9 Aircraft, Boeing ***. Boeing represents that the *** of this 737-*** is consistent with the terms of Letter Agreement 6-1162-KKT-080,
as amended.

 

 

	UAL-PA-04761-LA-1801467R1	SA-1
	Special Matters	Page 1

BOEING I UNITED
AIRLINES PROPRIETARY

    

    

    

 

 

2.             ***.

 

Unless otherwise noted, the
amounts of the *** stated in (i) Paragraphs 1.1 through 1.2 (***) are *** for 737-10 Aircraft; and (i) Paragraphs 1.3
through 1.4 (***) are ***. The *** will be *** to the scheduled month of the respective Aircraft delivery pursuant
to the Airframe *** formula set forth in the Purchase Agreement applicable to the Aircraft. The *** may, at the election of Customer,
be ***.

 

3.             737
Supplier Management.

 

It is Boeing’s 737
MAX design intent ***the 737 MAX ***. If a *** leads to a *** to be available only through a *** for the 737 MAX where ***, then ***
for such affected *** will have the necessary agreements in place to provide 737 MAX ***. These ***, known as ***, will include
(but not be limited to) *** that the terms of such *** are commercially reasonable

 

4.             Supplier
Diversity.

 

Customer and Boeing agree
to work towards a mutually agreeable solution for meeting diversity requirements in the supply base. Notwithstanding the foregoing sentence,
Boeing agrees to (i) identify parts and equipment where Customer makes the procurement decision for potential opportunities; (ii) submit
indirect reports until other options are vetted and approved; and (iii) continue to engage with Customer with regard to supplier
diversity to ensure Boeing supports Customer’s requirements.

 

 

	UAL-PA-04761-LA-1801467R1	SA-1
	Special Matters	Page 2

BOEING I UNITED
AIRLINES PROPRIETARY

    

    

    

 

 

5.             Assignment.

 

Unless otherwise noted herein,
*** described in this Letter Agreement are provided as a *** to Customer and in consideration of Customer’s taking title to the
Aircraft at time of delivery and becoming the operator of the Aircraft. Except as provided in Letter Agreement No. UAL-PA-04761-LA-1801472,
this Letter Agreement cannot be assigned, in whole or in part, without the prior written consent of Boeing. For purposes of the ***.

 

6.             Confidentiality

 

Customer and Boeing understand
that certain commercial and financial information contained in this Letter Agreement are considered by Boeing and Customer as confidential
and are subject to the terms and conditions set forth in Letter Agreement No. UAL-PA-04761-LA-1801470.

 

Very truly yours,

 

 

	THE
    BOEING COMPANY	 
	 	 
	By:	/s/
    Irma L. Krueger	 
	 	 
	Its:	Attorney-in-Fact	 
	 	 

 

 

	UAL-PA-04761-LA-1801467R1	SA-1
	Special Matters	Page 3

BOEING I UNITED
AIRLINES PROPRIETARY

    

    

    

 

 

	ACCEPTED AND AGREED TO this	 
	 	 
	Date:	September 25, 2018	 

 

	UNITED AIRLINES, INC.	 
	 	 
	 	 
	By:	/s/ Gerald Laderman	 
	 	 
	Its:	Executive Vice President and Chief Financial Officer	 

  

 

	UAL-PA-04761-LA-1801467R1	SA-1
	Special Matters	Page 4

BOEING I UNITED AIRLINES PROPRIETARY

    

    

    

  

		The Boeing Company
 P.O. Box 3707
 Seattle, WA 98124-2207

 

 

UAL-PA-04761-LA-1807022

 

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

		Subject:	*** Aircraft – 737-10

 

		Reference:	Purchase Agreement No. PA-04761
                                            (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc.
                                            (Customer) relating to Model 737 MAX aircraft (Aircraft)

 

This letter agreement (Letter
Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the
same meaning as in the Purchase Agreement.

 

1.             ***
Aircraft.

 

Subject to the terms and
conditions contained in this Letter Agreement, in addition to the Aircraft described in both Table 1’s to the Purchase Agreement
as of the date of execution of this Letter Agreement, Customer will *** Model 737-10 aircraft as *** aircraft (*** Aircraft).

 

2.             Delivery.

 

The number of aircraft and
delivery months are listed in the Attachment A to this Letter Agreement. The scheduled delivery position of each *** Aircraft listed
in Attachment A provides the delivery schedule in *** delivery windows consisting of a nominal delivery month (Nominal Delivery Month)
***. No later than *** prior to Nominal Delivery Month of Customer’s first *** Aircraft in each calendar year, Boeing will provide
written notice with a revised Attachment A of the scheduled delivery month for each *** Aircraft with a Nominal Delivery Month in such
calendar year.

 

3.             Configuration.

 

3.1           Subject
to the provisions of Article 3.2, below, the configuration for the *** Aircraft will be the Detail Specification for Boeing Model
737-10 aircraft at the revision level in effect at the time of Definitive Agreement (as defined below). Such Detail Specification will
be revised to include (i) changes applicable to the Detail Specification that are developed by Boeing between the *** Date (as defined
below) and the signing of the Definitive Agreement, (ii) changes required to obtain required regulatory certificates, and (iii) other
changes as mutually agreed.

 

3.2           Subject
to mutual agreement, the *** Aircraft may start from a different configuration specification, provided that it can achieve the same configuration
which would result pursuant to the provisions of Article 3.1.

 

	UAL-PA-04761-LA-1807022	 	SA-1
	*** Aircraft – 737-10	 	Page 1 

BOEING / UNITED AIRLINES, INC. PROPRIETARY
 

    

    

    

 

 

4.             Price.

 

4.1           The
Airframe Price and *** Features Prices for each of the *** Aircraft is identified in Attachment A to this Letter Agreement.  The
Airframe Price and *** Features Prices that will be identified in the Definitive Agreement for the *** Aircraft will equal ***. 
Boeing represents that the price protections provided in this Article 4.1 are consistent with the terms of Customer’s ***
status.

 

4.2           The
Airframe Price, *** Features Prices, and Aircraft Basic Price for each of the *** Aircraft shall be adjusted in accordance with the terms
set forth in Article 2.1.5 (***) of the AGTA.

 

4.3           The
*** Base Price shall be developed in accordance with the terms of the Purchase Agreement and determined at the time of Definitive Agreement.

 

5.             Payment.

 

5.1           Customer
will *** shown in Attachment A for each *** Aircraft ***, on the date of execution of this Letter Agreement. If Customer ***, the ***.
If Customer does ***, Boeing will *** Aircraft and *** Customer on ***.

 

5.2           Notwithstanding
the amount shown in Attachment A, the *** for each *** Aircraft.

 

5.3           At
Definitive Agreement for the *** Aircraft, *** will be payable as specified in the Purchase Agreement. The remainder of the Aircraft
Price for the *** Aircraft will be paid at the time of delivery.

 

6.             ***.

 

6.1           Customer
may *** by giving written notice to Boeing on or before the date *** prior to the earlier of the first day of either the Nominal Delivery
Month or the delivery month listed in Attachment A (*** Date).

 

6.2           After
receipt of Customer’s *** notice, Boeing may make a one-time request that the delivery date for such *** Aircraft ***. Customer
will consider and, at Customer’s sole discretion, accommodate Boeing’s request if ***. Boeing may *** the *** Aircraft delivery
date, which Customer will consider at Customer’s sole discretion.

 

6.3           If
at any given time, the aggregate number of *** Aircraft falls below the number of undelivered Aircraft, then Customer may request for
Boeing to provide *** Aircraft in *** Aircraft under the Purchase Agreement on the basis of the terms of this Letter Agreement.

 

6.3.1            Boeing
will accommodate Customer’s request for such *** Aircraft in accordance with the terms of Letter Agreement 6-1162-KKT-080, as amended;
provided, however, that such Boeing accommodation is further conditioned upon Boeing having *** Aircraft.

 

	UAL-PA-04761-LA-1807022	 	SA-1
	*** Aircraft – 737-10	 	Page 2

BOEING / UNITED AIRLINES,
INC. PROPRIETARY

    

    

    

 

 

 

6.3.2            In
response to any Customer request for *** Aircraft, Boeing will provide a written notice for Customer's consideration and written acceptance
*** of such Boeing notice. Delivery months will be specified in Boeing’s notice for confirmation by Customer through execution
of a supplemental agreement incorporating such *** Aircraft. Delivery positions of such *** Aircraft will be subject to mutual agreement
and will take into account ***.

 

7.             Definitive
Agreement.

 

Following Customer’s
*** the parties will sign a definitive agreement for the purchase of such *** Aircraft (Definitive Agreement) within *** of such
exercise. The Definitive Agreement will include the provisions of the Purchase Agreement as modified to reflect the provisions of this
Letter Agreement. In the event the parties have not entered into a Definitive Agreement within *** following ***, either party may ***
such *** Aircraft by giving written notice to the other within ***. If Customer and Boeing fail to enter into the Definitive Agreement,
Boeing will *** the *** for that *** Aircraft and shall have no further obligation with respect to that *** Aircraft.

 

8.             Assignment.

 

Except
as provided in Letter Agreement No. UAL-PA-04761-LA-1801472, the rights and obligations described in this Letter Agreement
are provided to Customer in consideration of Customer’s becoming the operator of the Aircraft and cannot be assigned in whole or
in part.

 

9.             Confidential
Treatment.

 

Customer and Boeing understand
that certain commercial and financial information contained in this Letter Agreement are considered by Boeing and Customer as confidential
and are subject to the terms and conditions set forth in Letter Agreement No. UAL-PA-04761-LA-1801470.

 

Very truly yours,

 

	THE
    BOEING COMPANY	 
	 	 
	By:	/s/
    Irma L. Krueger	 
	 	 
	Its:	Attorney-in-Fact	 

 

	UAL-PA-04761-LA-1807022	 	SA-1
	*** Aircraft – 737-10	 	Page 3

BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

 

 

ACCEPTED AND AGREED TO this

 

	Date:	September 25, 2018	 

 

UNITED AIRLINES, INC.

 

	By:	/s/ Gerald Laderman	 
	 	 	 
	Its:	Executive Vice President and
    Chief Financial Officer	 

 

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	*** Aircraft – 737-10	 	Page 4

BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

Attachment A to Letter Agreement No. UAL-PA-04761-LA-1807022 

737-***
Aircraft Delivery, Description, Price and ***

 

	Airframe Model/MTOW:	737-***	*** pounds	 	Detail Specification:	***	 
	 	 	 	 	 	 	 
	Engine Model/Thrust:	***	*** pounds	Subject to confirmation	Airframe Price Base Year/*** Formula:	***	***
	Airframe Price:	 	$***	 	Engine Price Base Year/*** Formula:	***	***
	*** Features:	 	$***	 	 	 	 
	Sub-Total of Airframe and Features:	$***	 	Airframe *** Data:	 	 
	Engine Price (Per Aircraft):	 	$***	 	Base Year Index (ECI):	***	 
	Aircraft Basic Price (Excluding BFE/SPE):	$***	 	***	***	 
	***	 	$***	 	 	 	 
	***	 	$***	 	 	 	 
	 	 	 	 	 	 	 
	Deposit per Aircraft:	 	$***	 	 	 	 

 

	#
    of *** Aircraft	 	 	***	***

    Exercise

    Expiry	 	***
    Estimate	***
    Per Aircraft (Amts. Due/*** Prior to Delivery):	 	 	 
	Delivery	Number
    of 	Factor	Actual
    or Nominal 	***
    Base	***	***	***	***
	Date	Aircraft	(Airframe)	Delivery
    ***	Price
    Per A/P	***	***	***	***
	***	***	***	***	***	***	***	***	***	***	***
	 	Total:	***	 	 	 	 	 	 	 	 

 

	  * Nominal delivery *** are subject to revision pursuant to §2 of Letter
    Agreememt UAL-PA-04761-LA-1807022 including any successor thereof.

 

	UAL‐PA‐04761‐112118‐1F.TXT	 	SA‐1, MAX ***,

                                                                                Page 2

Boeing / United Airlines,
Inc. Proprietary

    

    

    

  

	 	 	The Boeing Company 

P.O. Box 3707

 Seattle, WA 98124-2207

 

 

UAL-PA-04761-LA-1807049

 

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

		Subject:	*** for 737-10 Aircraft

 

	References:	1)	Purchase Agreement No. PA-04761 (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc.
(Customer) relating to Model 737 MAX aircraft (Aircraft); and

 

		2)	Letter Agreement UAL-PA-04761-LA-1801473 entitled “737-10 Aircraft
                                            (737-10 Aircraft) ***” (***)

 

This letter agreement (Letter
Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the
same meaning as in the Purchase Agreement.

 

Background.

 

Section 2.5.5 of the
Attachment to the *** provides a ***. Article 5.4 of the AGTA and the *** provide a procedure for demonstration of *** with the
*** prior to Aircraft delivery. Such method will be used to demonstrate *** with the ***. The parties agree that the *** contained in
this Letter Agreement apply if the *** report furnished to Customer for any 737-10 Aircraft pursuant to Article 5.4 of the AGTA
shows *** than ***.

 

1.            Rights
and Obligations in the Event of a ***.

 

1.1            Aircraft
Delivery. In the event of a *** for any 737-10 Aircraft, at the time Boeing tenders that 737-10 Aircraft for delivery, *** set forth
in paragraph 1.2 or paragraph 2, herein, as applicable. Customer *** delivery of such 737-10 Aircraft ***.

 

1.2            Post
Delivery ***. In the event of a *** for any 737-10 Aircraft, the following terms and conditions will apply:

 

1.2.1            For
the period of *** delivery of an applicable 737-10 Aircraft, ***, or cause to be *** parts and/or *** (Improvement Parts) which,
*** in such 737-10 Aircraft, would ***.

 

1.2.2            If
***, or to cause to be *** such 737-10 Aircraft, then Customer and Boeing will *** upon the details of *** program. *** will be provided
*** to ***.

 

1.2.3            If
Customer elects to *** in such 737-10 Aircraft, *** after the delivery *** *** during 737-10 Aircraft *** which cannot be *** during
737-10 Aircraft *** will be *** within a mutually agreed period of time. *** in accordance with Boeing and engine manufacturer instructions.

 

	UAL-PA-04761-LA-1807049	 	SA-1

 

	***	 	 Page 1

 

BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

 

 

1.2.4            ***
of ***. *** related to engines will apply also to spare engines ***. Boeing ***, will give Customer reasonable advance written notice
of the estimated *** at Customer’s maintenance base for any such ***. *** this Letter Agreement and be *** to *** using established
*** procedures and other terms identified in the *** contemplated in paragraph *** herein.

 

		2.	***.

 

After *** delivery of an
applicable 737-10 Aircraft, if Boeing has not provided, or caused to be provided *** which ***, then Boeing will *** described in this
paragraph 2. Subject to mutual agreement, Boeing and Customer may elect to *** the efforts under paragraph 1 herein in lieu of ***
described in this paragraph 2.

 

2.1            ***.
Boeing will *** amount will be prorated for fractions of the ***. If the compliance document demonstrates ***, then Customer and Boeing
will work together in good faith to reach *** to adequately address such *** for any 737-*** Aircraft. *** is unable to provide a ***
to adequately address the *** within a reasonable timeframe and does not *** (within a reasonable timeframe) that it will provide ***
any such 737-10 Aircraft and, if the ***.

 

2.2            ***.
*** to Customer pursuant to this section 2 will be *** by Boeing and/or the *** at the time of 737-10 Aircraft delivery. No ***
will be *** pursuant to this section 2 for any 737-10 Aircraft not *** Customer. Each *** 737-10 Aircraft ***.

 

2.3            ***
Adjustments. The *** attributable to *** will be determined by Boeing analysis based on data certified to be correct by Boeing. The
*** will be deemed to be the *** as calculated using *** based on the data furnished pursuant to Article *** of the AGTA. If ***
in a 737-10 Aircraft as set forth in paragraph 1.2 above, payments of *** with the *** after such *** ***. If Customer elects not
to *** in any applicable 737-10 Aircraft as set forth in paragraph 1.2 above, ***.

 

		3.	***.

 

Boeing and Customer agree
it is not the intent of the parties to provide benefits hereunder that *** to be provided (a) by Boeing under the Purchase Agreement,
or any other agreement between Boeing and Customer, or (b) by *** under any agreement between *** and Customer, due to the 737-10
Aircraft ***.

 

		4.	***.

 

Customer agrees that the
*** contained in paragraphs 1 and 2 herein are *** for purposes of *** with respect to the *** of Customer’s 737-10 Aircraft
and are *** of any and all of Boeing’s *** and *** to Customer in connection therewith. Customer *** Boeing and ***.

 

5.            Assignment.

 

Except as provided in Letter
Agreement No. UAL-PA-04761-LA-1801472, the rights and obligations described in this Letter Agreement are provided to Customer in
consideration of Customer’s ***.

 

	UAL-PA-04761-LA-1807049	 	SA-1

 

	***	 	 Page 2

 

BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

 

 

6.            Confidential
Treatment.

 

Customer and Boeing understand
that certain commercial and financial information contained in this Letter Agreement are considered by Boeing and Customer as confidential
and are subject to the terms and conditions set forth in Letter Agreement No. UAL-PA-04761-LA-1801470.

 

Very truly yours,

 

	THE
    BOEING COMPANY	 
	 	 
	By:	/s/
    Irma L. Krueger	 
	 	 
	Its:	Attorney-in-Fact	 
	 	 

 

	UAL-PA-04761-LA-1807049	 	SA-1

 

	***	 	 Page 3

 

BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

 

 

	
    ACCEPTED AND AGREED TO this
	 
	 	 
	Date:	September 25, 2018	 
	 	 
	UNITED AIRLINES, INC.	 
	 	 
	By:	 	 
	 	 
	Its:	Executive Vice President and Chief Financial Officer	 

 

	UAL-PA-04761-LA-1807049	 	SA-1

 

	***	 	 Page 4

 

BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

		
    The Boeing Company

    P.O. Box 3707

    Seattle, WA 98124 2207

 

UAL-PA-04761-LA-1807420

 

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

		Subject:	737-9 Aircraft Model ***

 

		Reference:	Purchase Agreement No. PA-04761
                                            (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc.
                                            (Customer) relating to Model 737 MAX aircraft (Aircraft)

 

This letter agreement (Letter
Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the
same meaning as in the Purchase Agreement.

 

Subject to the terms herein,
Customer may ***:

 

***

 

For this Letter Agreement, each such *** aircraft
referred to in (i) and (ii) above shall be defined to be a *** Aircraft.

 

		1.	Customer’s Written Notice.

 

Customer shall provide written
notice of its intention to ***,

 

For resulting Boeing *** Aircraft:

 

		(i)	No later
                                            than the first day of the month that is ***, provided that a *** Customer, or;

 

		(ii)	No
                                            later than the first day of the month that is ***, if a *** and delivered to Customer.

 

For resulting Boeing Model 737-*** Aircraft:

 

		(iii)	No later
                                            than the first day of the month that is ***, provided that a 737- ***

 

		(iv)	No
                                            later than the first day of the month that is ***, if a 737-*** and delivered to Customer.

 

		2.	***

 

		3.	Definitive Agreement.

 

***

 

	UAL-PA-04761-LA-1807420	SA-1
	***	Page 1

BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

 

		4.	***

 

		5.	Assignment.

 

Except as provided in Letter
Agreement No. UAL-PA-04761-LA-1801472, the rights and obligations described in this Letter Agreement are provided to Customer in
consideration of Customer’s becoming the operator of the Aircraft and cannot be assigned in whole or in part.

 

		6.	Confidential Treatment.

 

Customer and Boeing understand that certain commercial
and financial information contained in this Letter Agreement are considered by Boeing and Customer as confidential and are subject to
the terms and conditions set forth in Letter Agreement No. UAL-PA-04761-LA-1801470.

 

Very truly yours,

 

	THE
    BOEING COMPANY	 
	 	 
	By:	/s/
    Irma L. Krueger	 
	 	 
	Its:	Attorney-in-Fact
    	 

 

	UAL-PA-04761-LA-1807420	SA-1
	***	Page 2

BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

 

	ACCEPTED AND AGREED TO this	 
	 	 
	Date:	September 25, 2018	 

 

 

	UNITED AIRLINES, INC.	 
	 	 
	By:	/s/ Gerald Laderman	 
	 	 
	Its:	Executive Vice President and Chief Financial Officer	 

 

	UAL-PA-04761-LA-1807420	SA-1
	***	Page 3

BOEING / UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

 

 

Attachment A To 

Letter Agreement UAL-PA-03776-LA-1807420 

737-***
Aircraft Description and Price

 

	Airframe Model/MTOW:	 	737-***	 	*** pounds	 	 	 	Detail Specification:	 	 	 	***	 	 
	Engine Model/Thrust:	 	***	 	*** pounds	 	 	 	Airframe Price Base Year/*** Formula:	 	***	 	 	 	***
	Airframe Price:	 	 	 	$***	 	 	 	Engine Price Base Year/*** Formula:	 	***	 	 	 	***
	*** Features:	 	 	 	$***	 	ESTIMATE	 	 	 	 	 
	Sub-Total of Airframe and Features:	 	 	 	$***	 	 	 	Airframe *** Data:	 	 	 
	Engine Price (Per Aircraft):	 	 	 	$***	 	 	 	Base Year Index (ECI):	 	 	 	***
	Aircraft Basic Price (Excluding BFE/SPE):	 	 	 	$***	 	 	 	Base Year Index (CPI):	 	 	 	***
	Buyer Furnished Equipment (BFE) Estimate:	 	 	 	$***	 	ESTIMATE	 	 	 	 	 
	Seller Purchased Equipment (SPE) Estimate:	 	 	 	$***	 	ESTIMATE	 	 	 	 	 

 

	UAL-PA-04761	SA-1, Page 1

Boeing / United Airlines, Inc. Proprietary

 

    

     

    

 

 

 

Attachment B 

To Letter Agreement UAL-PA-03776-LA-1807420 

737-***
Aircraft Description and Price

 

	Airframe Model/MTOW:	 	737-***	 	*** pounds	 	 	 	Detail Specification:	 	 	 	***	 
	Engine Model/Thrust:	 	***	 	*** pounds	 	 	 	Airframe Price Base Year/*** Formula:	 	***	 	 	***
	Airframe Price:	 	 	 	$***	 	 	 	Engine Price Base Year/*** Formula:	 	***	 	 	***
	Optional Features:	 	 	 	$***	 	ESTIMATE	 	 	 	 	 
	Sub-Total of Airframe and Features:	 	 	 	$***	 	 	 	Airframe *** Data:	 	 	 
	Engine Price (Per Aircraft):	 	 	 	$***	 	 	 	Base Year Index (ECI):	 	 	 	***
	Aircraft Basic Price (Excluding BFE/SPE):	 	 	 	$***	 	 	 	Base Year Index (CPI):	 	 	 	***
	Buyer Furnished Equipment (BFE) Estimate:	 	 	 	$***	 	ESTIMATE	 	 	 	 	 
	Seller Purchased Equipment (SPE) Estimate:	 	 	 	$***	 	ESTIMATE	 	 	 	 	 

 

	UAL-PA-04761	SA-1, Page 2

Boeing / United Airlines, Inc. Proprietary

 

    

     

    

 

 

 

Attachment C To 

Letter Agreement UAL-PA-03776-LA-1807420 

737-***
Aircraft Description and Price

 

	Airframe Model/MTOW:	 	737-***	 	*** pounds	 	 	 	Detail Specification:	 	 	 	***
	Engine Model/Thrust:	 	***	 	*** pounds	 	 	 	Airframe Price Base Year/*** Formula:	 	***	 	 	 	***
	Airframe Price:	 	 	 	$***	 	 	 	Engine Price Base Year/*** Formula:	 	***	 	 	 	***
	*** Features:	 	 	 	$***	 	ESTIMATE	 	 	 	 	 
	Sub-Total of Airframe and Features:	 	 	 	$***	 	 	 	Airframe *** Data:	 	 	 
	Engine Price (Per Aircraft):	 	 	 	$***	 	 	 	Base Year Index (ECI):	 	 	 	***
	Aircraft Basic Price (Excluding BFE/SPE):	 	 	 	$***	 	 	 	Base Year Index (CPI):	 	 	 	***
	Buyer Furnished Equipment (BFE) Estimate:	 	 	 	$***	 	ESTIMATE	 	 	 	 	 
	Seller Purchased Equipment (SPE) Estimate:	 	 	 	$***	 	ESTIMATE	 	 	 	 	 

 

	UAL-PA-04761 	SA-1, Page 3

Boeing / United Airlines, Inc. Proprietary

 

    

     

    

 

	 	
    The Boeing Company

    P.O. Box 3707

    Seattle, WA 98124 2207

 

UAL-PA-04761-LA-1807490

 

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

		Subject:	737-9 Aircraft ***

 

		Reference:	Purchase Agreement No. PA-04761
                                            (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc.
                                            (Customer) relating to Model 737-*** MAX aircraft (Aircraft)

 

This letter agreement (Letter
Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the
same meaning as in the Purchase Agreement.

 

		1.	Definitions.

 

*** Notice means the
written communication provided by Boeing to Customer in accordance with the requirements of Article 4.1, below.

 

Program Aircraft means
each Aircraft specified in Table 1 of the Purchase Agreement as of the date of this Letter Agreement and any 737-9 *** Aircraft
arising as a result of exercise of Customer’s aircraft model ***.

 

		2.	Applicability.

 

Notwithstanding any other
provision of the Purchase Agreement to the contrary, the parties agree that the *** for the Airframe Price and *** Features Prices for
each Program Aircraft shall be determined in accordance with this Letter Agreement.

 

		3.	*** Forecast.

 

Boeing will release an ***
forecast in *** of each year based on Boeing’s then current standard ***. Only one *** forecast shall be used to conduct the ***
analysis performed in accordance with Article 4.1, below, for a given Program Aircraft. The *** forecast applicable to a given Program
Aircraft is set forth in Attachment A.

 

		4.	***.

 

4.1.4            In
the event that Boeing *** the *** Notice as detailed in Article 4.1.2 or Article 4.1.3 and Customer ***, then Customer ***
the Purchase Agreement with respect to such affected Program Aircraft.

 

4.2           If
Boeing provides Customer the *** described in Article 4.1.2 or Article 4.1.3 above, then Customer shall notify Boeing *** contained
in Articles 4.1.2, 4.1.3, or 4.1.4 above within *** of its receipt of the *** Notice from Boeing. In the event Customer *** in accordance
with Article 4.1.4 above, then Boeing ***.

 

	UAL-PA-04761-LA-1807490	SA-1
	*** ***	Page 1 

BOEING/UNITED AIRLINES, INC.
PROPRIETARY

    

    

    

 

 

4.2.1            Within
*** of Boeing’s receipt of *** notice for any such *** Program Aircraft under Article 4.2 above, Boeing *** written notice
to Customer ***.

 

4.2.2            Should
Customer *** any notice to Boeing in accordance with Article 4.2 above, then the *** for such Program Aircraft shall be calculated
in accordance with Article 4.1.2.

 

4.3           In
the event that the *** of a Program Aircraft that is subject to either Article 4.1.1, Article 4.1.2 or Article 4.1.3 above,
*** applicable to such Program Aircraft will be determined pursuant to Article 5 below.

 

		5.	***

 

		7.	Applicability
                                            to ***.

 

The ***, identified in the
Purchase Agreement as subject to *** pursuant to Supplemental Exhibit AE1, and which pertains to the Program Aircraft shall be ***.

 

		8.	Assignment.

 

Except as provided in Letter
Agreement No. UAL-PA-04761-LA-1801472, the rights and obligations described in this Letter Agreement are provided to Customer in
consideration of Customer’s becoming the operator of the Aircraft and cannot be assigned in whole or, in part.

 

		9.	Confidential Treatment.

 

Customer and Boeing understand
that certain commercial and financial information contained in this Letter Agreement are considered by Boeing and Customer as confidential
and are subject to the terms and conditions set forth in Letter Agreement No. UAL-PA-04761-LA-1801470.

 

Very truly yours,

 

	THE BOEING COMPANY	 
	 	 
	By	/s/
    Irma L. Krueger	 
	 	 
	Its	Attorney-in-Fact	 

 

	UAL-PA-04761-LA-1807490	SA-1
	*** 	Page 2 

BOEING/UNITED AIRLINES, INC.
PROPRIETARY

    

    

    

 

 

	ACCEPTED AND AGREED TO this	 
	 	 	 
	Date:	 	September 25, 2018	 
	 	 	 
	UNITED AIRLINES, INC.	 
	 	 	 
	By	/s/ Gerald Laderman	 
	 	 	 
	Its	Executive Vice President Finance and Chief Financial Officer	 

 

	UAL-PA-04761-LA-1807490	SA-1
	*** 	Page 3 

BOEING/UNITED AIRLINES, INC. PROPRIETARY

    

    

    

 

 

ATTACHMENT A

*** Forecast & *** Notice Date

 

	***

                                                                                Forecast
	Applicable to Program Aircraft

                                                                                Delivering in Time Period
	***Notice

                                                                                Date

	***	***	***

 

	UAL-PA-04761-LA-1807490	SA-1
	*** 	Page 4 

BOEING/UNITED AIRLINES, INC.
PROPRIETARY

    

    

    

 

 

ATTACHMENT B

*** Factors - *** Base Year

 

	***	***	***	***
	***	***	***	***

 

	UAL-PA-04761-LA-1807490	SA-1
	*** 	Page 5 

BOEING/UNITED AIRLINES, INC. PROPRIETARYExhibit 10.7

 

CERTAIN IDENTIFIED INFORMATION
HAS BEEN EXCLUDED FROM THE EXHIBIT BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) WOULD BE COMPETITIVELY HARMFUL IF PUBLICLY DISCLOSED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.

 

SUPPLEMENTAL AGREEMENT NO. 2 to

 

PURCHASE AGREEMENT NUMBER 04761

 

between

 

THE BOEING COMPANY

 

and

 

United
Airlines, Inc.

 

relating to

 

Boeing
Model 737 MAX Aircraft

 

THIS SUPPLEMENTAL AGREEMENT
No. 2 (SA-2) is entered into as of December 12, 2018 by and between The Boeing Company, a Delaware corporation, (Boeing)
and United Airlines, Inc., a Delaware corporation, (Customer);

 

Customer and Boeing entered
into Purchase Agreement No. 04761 dated as of the 15th day of May of 2018 as amended and supplemented (Purchase Agreement),
relating to the purchase and sale of Model 737 MAX aircraft. This Supplemental Agreement is an amendment to the Purchase Agreement;

 

WHEREAS, Boeing and Customer
agree to add *** 737-*** Aircraft to the Purchase Agreement as a result of Customer’s *** Aircraft;

 

WHEREAS, Boeing and Customer
have agreed to add *** 737-*** Aircraft and *** 737-*** Aircraft to the Purchase Agreement as a result of Customer’s purchase of
such aircraft;

 

WHEREAS, Boeing and Customer
have agreed to add *** 737-*** Aircraft and *** 737-*** Aircraft to the Purchase Agreement;

 

WHEREAS, Boeing and Customer
have agreed to the *** 737-*** Aircraft *** 737-*** Aircraft and *** 737-*** Aircraft;

 

    	UAL-PA-04761	 	SA-2, Page 1
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

     

    

 

NOW THEREFORE, in consideration
of the mutual covenants herein contained, the parties agree to amend the Purchase Agreement as follows:

 

		1.	Table of Contents.

 

The “Table of Contents”
is deleted in its entirety and replaced with the attached “Table of Contents” (identified by “SA-2”).

 

		2.	Tables.

 

2.1.           
Table 1 entitled “737-*** Aircraft Delivery, Description, Price and ***” (identified by “SA-2”)
is added to the Purchase Agreement to *** 737-*** Aircraft to the Purchase Agreement, including *** 737-*** Aircraft.

 

2.2.           
Table 1 entitled “737-*** Aircraft Delivery, Description, Price and ***” is deleted in its entirety as a result
of the *** 737-*** Aircraft, *** 737-*** Aircraft and *** 737-*** Aircraft.

 

2.3.           
Table 1 entitled “737-*** Aircraft Delivery, Description, Price and ***” (identified by “SA-2”)
is deleted in its entirety and replaced with a revised Table 1 to add *** 737-*** Aircraft arising from (i) Customer’s purchase
of *** 737-*** Aircraft and (ii) Customer’s *** 737-*** Aircraft.

 

		3.	Exhibit and Supplemental Exhibit.

 

3.1.           
Exhibit A entitled “737-8 Aircraft Configuration” (identified by “SA-2”) is added to the Purchase Agreement
to incorporate configuration data for the *** 737-8 Aircraft.

 

3.2.           
Supplemental Exhibit BFE1 entitled “BFE Variables for the 737-8 Aircraft” (identified by “SA-2”) is added
to the Purchase Agreement to incorporate BFE data for the *** 737-8 Aircraft.

 

3.3.           
Supplemental Exhibit BFE1 entitled “BFE Variables for the 737-10 Aircraft” (identified by “SA-2”) is deleted
in its entirety and replaced with a revised BFE1 to incorporate BFE data for the additional *** 737-10 Aircraft.

 

		4.	Letter Agreements.

 

4.1.           
Letter Agreement No. UAL-PA-04761-LA-l801465 entitled “Open Matters 737-10 Aircraft” is deleted in its entirety and
is replaced by Letter Agreement No. UAL-PA-04761-LA- l801465R1 entitled “Open Matters 737-8 Aircraft and 737-10 Aircraft”
(identified by “SA-2”) to revise applicability to both the 737-8 Aircraft and to the 737-10 Aircraft.

 

4.2.           
Letter Agreement No. UAL-PA-04761-LA-l801467R1 previously entitled “Special Matters – 737-9 Aircraft and 737-10 Aircraft”
is deleted in its entirety and is replaced by Letter Agreement No. UAL-PA-04761-LA-l801467R2 entitled “Special Matters - 737-MAX
Aircraft” (identified by “SA-2”) to add certain 737-8 Aircraft *** considerations.

 

4.3.           
Letter Agreement No. UAL-PA-04761-LA-l807022 entitled “737-10 *** Aircraft” is deleted in its entirety and is replaced
by Letter Agreement No. UAL-PA-04761-LA-l807022R1 entitled “*** Aircraft – 737-*** and 737-***” (identified by “SA-2”)
to reflect a *** 737-*** *** Aircraft *** 737-*** Aircraft.

 

    	UAL-PA-04761	 	SA-2, Page 2
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

     

    

 

4.4.           
Letter Agreement No. UAL-PA-04761-LA-l807490 entitled “737-9 Aircraft ***” is deleted in its entirety and is replaced
by Letter Agreement No. UAL-PA-04761-LA-l807490R1 entitled “737-8 Aircraft and 737-9 Aircraft ***” (identified by “SA-2”)
to reflect applicability to the 737-8 Aircraft and to the 737-9 Aircraft.

 

4.5.           
With respect to a *** for the 737-8 Aircraft: the parties agree that the 737-8 Aircraft will have a minimum of *** specified Section
2.1.5 of the Attachment to Letter Agreement UAL-PA-03784-LA-1601973R1 entitled “Aircraft *** – *** 737-800 Aircraft and 737-800
*** Aircraft” when ***. Such comparison will use specifically defined standard assumptions, conditions, operating rules and method
of compliance (Demonstration Procedure). The parties agree that this Section 4.4 commitment will be superseded once Boeing provides
Customer with *** for the 737-8 Aircraft.

 

		5.	Miscellaneous.

 

5.1.           
References:

 

5.1.1.     
Table 1 entitled “737-*** Aircraft Delivery, Description, Price and ***”, Table 1 entitled “737-*** Aircraft
Delivery, Description, Price and ***” and Table 1 entitled “737-*** Aircraft Delivery, Description, Price and ***”
are individually and collectively referred to as “Table 1” in the Purchase Agreement.

 

5.1.2.     
Exhibit A entitled “737-8 Configuration”, Exhibit A entitled “737-9 Configuration” and Exhibit A entitled
 “737-10 Configuration” are individually and collectively referred to as “Exhibit A” in the Purchase Agreement.

 

5.1.3.     
Supplemental Exhibit BFE1 entitled “BFE Variables 737-8 Aircraft”, Supplemental Exhibit BFE1 entitled “BFE Variables
737-9 Aircraft” and Supplemental Exhibit BFE1 entitled “BFE Variables 737-10 Aircraft” are individually and collectively
referred to as “Supplemental Exhibit BFE1” in the Purchase Agreement.

 

5.1.4.     
If Boeing or Customer determines that the references and deemed inclusions described in section 5.1 of this SA-2 should be further
amended, then Boeing and Customer will work together for a mutually agreeable solution.

 

5.2.           
Boeing and Customer agree *** in accordance with Letter Agreement UAL-LA-1808863.

 

The rest of the page is intentionally
blank. Signature page follows.

 

    	UAL-PA-04761	 	SA-2, Page 3
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

     

    

 

EXECUTED IN DUPLICATE as of the day and year first written above.

 

	THE BOEING COMPANY	 	UNITED
    AIRLINES, INC.
	 	 	 
	 	 	 
	/s/ Irma
    L. Krueger	 	/s/ Gerald
    Laderman
	Signature	 	Signature
	 	 	 
	 	 	 
	Irma L. Krueger	 	Gerald Laderman
	Printed Name	 	Printed Name
	 	 	 
	 	 	 
	

                                            Attorney-in-Fact
	 	Executive
                                            Vice President and

                                            Chief Financial Officer

	Title	 	Title

 

    	UAL-PA-04761	 	SA-2, Page 4
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

     

    

 

TABLE OF CONTENTS

 

	

    ARTICLES	SA
    

    NUMBER
	Article
    1.	Quantity,
    Model and Description	 
	Article
    2.	Delivery Schedule	 
	Article
    3.	Price	 
	Article
    4.	Payment	 
	Article
    5.	Additional
    Terms	 
	TABLE	 
	1.	737-***
    Aircraft Delivery, Description, Price and ***	SA-2
	 	 	 
	1.	737-***
    Aircraft Delivery, Description, Price and ***	SA-2

 

	EXHIBITS	 
	A	737-8
    Aircraft Configuration	SA-2
	A	737-9
    Aircraft Configuration	SA-1
	A	737-10
    Aircraft Configuration	 
	B.	Aircraft
    Delivery Requirements and Responsibilities	 
	SUPPLEMENTAL
    EXHIBITS	 
	AE1.	***/Airframe
    and *** Features for the 737MAX Aircraft	 
	BFE1.	BFE
    Variables 737-8 Aircraft	SA-2
	BFE1.	BFE
    Variables 737-9 Aircraft	SA-1
	BFE1.	BFE
    Variables 737-10 Aircraft	SA-2
	EE1.	Engine
    Warranty ***	 
	SLP1.	Service
    Life Policy Components	 

 

    	UAL-PA-04761	Table of Contents, Page 1 of 3	 SA-1
	 	 	 
	BOEING / UNITED AIRLINES, INC. PROPRIETARY 

     

    

 

	TABLE
    OF CONTENTS, CONTINUED	 
	

    LETTER AGREEMENTS	SA
    NUMBER
	UAL-PA-04761-LA-1801463	***
    Matters	 
	UAL-PA-04761-LA-1801464	Demonstration
    Flight Waiver	 
	UAL-PA-04761-LA-1801465R1	Open
    Matters 737-8 Aircraft and 

    737-10 Aircraft	SA-2
	UAL-PA-04761-LA-1801466	Seller
    Purchased Equipment	 
	UAL-PA-04761-LA-1801467R2	Special
    Matters – 737 MAX Aircraft	SA-2
	UAL-PA-04761-LA-1801468	***	 
	UAL-PA-04761-LA-1801469	***	 
	UAL-PA-04761-LA-1801470	Privileged
    and Confidential Matters	 
	UAL-PA-04761-LA-1801471	AGTA
    Matters	 
	UAL-PA-04761-LA-1801472	Assignment
    Matters	 
	UAL-PA-04761-LA-1801473	737-10
    Aircraft ***	 
	UAL-PA-04761-LA-1801474	***
    for the 737-10 Aircraft	 
	UAL-PA-04761-LA-1801475	Loading
    of Customer Software	 
	UAL-PA-04761-LA-1801476	Installation
    of Cabin Systems Equipment	 
	UAL-PA-04761-LA-1801477	Special
    Customer Support Matters 	 
	UAL-PA-04761-LA-1801478	Delivery
    *** Matters	 
	UAL-PA-04761-LA-1807022R1	***
    Aircraft – 737-*** and 737-***	SA-2
	UAL-PA-04761-LA-1807049	*** for
    737-10 Aircraft	SA-1
	UAL-PA-04761-LA-1807420	737-9
    Aircraft Model ***	SA-1
	UAL-PA-04761-LA-1807490R1	737-8
    Aircraft and 737-9 Aircraft ***	SA-2

 

    	UAL-PA-04761	Table of Contents, Page 2 of 3	 SA-1
	 	 	 
	BOEING / UNITED AIRLINES, INC. PROPRIETARY 

     

    

 

	SUPPLEMENTAL
    AGREEMENTS	DATED
    AS OF
	Supplemental Agreement
    No. 1	September 25, 2018
	Supplemental Agreement
    No. 2	December 12, 2018
	 	 

 

    	UAL-PA-04761	Table of Contents, Page 3 of 3	 SA-1
	 	 	 
	BOEING / UNITED AIRLINES, INC. PROPRIETARY 

     

    

 

Table 1 to Purchase Agreement
No. 04761

737-*** Aircraft Delivery,
Description, Price and *** 

 

	Airframe Model/MTOW:	737-***	*** pounds	 	Detail
    Specification:	***	 
	 	 	 	 	 	 	 
	Engine Model/Thrust:	***	*** pounds	+	Airframe
    Price Base Year/Escalation Formula:	***	***
	Airframe Price:	 	$***	 	Engine
    Price Base Year/Escalation Formula:	***	***
	***
    Features:	 	$***	 	 	 	 
	Sub-Total
    of Airframe and Features:	$***	 	Airframe
    Escalation Data:	 	 
	Engine
    Price (Per Aircraft):	 	$***	 	Base
    Year Index (ECI):	***	 
	Aircraft
    Basic Price (Excluding BFE/SPE):	$***	 	Base
    Year Index (CPI):	***	 
	Buyer
    Furnished Equipment (BFE) Estimate:	$***	 	 	 	 
	Seller
    Purchased Equipment (SPE) Estimate:	$***	 	 	 	 
	 	 	 	 	 	 	 
	Deposit per
    Aircraft:	 	$***	 	 	 	 

 

	#
    of Aircraft	Delivery
    Date	 	***	Manufacturer

    Serial Number	 	***
    Estimate	***
    Per Aircraft (Amts. Due/***. Prior to Delivery):
	Number
    of 	Factor	Actual
    or Nominal	***
    Base	***	***	***	***
	Aircraft	(Airframe)	Delivery
    ****	Price
    Per A/P	***%	***%	***%	***%
	***	***	***	***	***	***	$***	$***	$***	$***	$***
	 	Total:	***	 	 	 	 	 	 	 	 

 

  * Nominal delivery month, subject
to revision pursuant to Letter Agreement number UAL-PA-04761-LA-1801465R1 entitled "Open Matters 737-8 Aircraft and 737-10 Aircraft".

 

Note: Serial Numbers are not yet available
but even when provided will be provided as guidance only and are subject to change until delivery.

 

+ - Subject to confirmation by engine manufacturer

 

    	UAL-PA-03776 APR: 84094.TXT	737-*** Aircraft
	 	Table 1, SA-2, Page 1
	 	 
	Boeing / United Airlines, Inc. Proprietary

     

    

 

 

Table 1 to Purchase Agreement No. 04761

737-*** Aircraft Delivery, Description, Price and ***

 

	Airframe Model/MTOW:	737-***	*** pounds	 	Detail Specification:	***	 
	Engine Model/Thrust:	***	*** pounds	+	Airframe Price Base Year/Escalation Formula:	***	***
	Airframe Price:	 	$***	 	Engine Price Base Year/Escalation Formula:	***	***
	*** Features:	 	$***	 	 	 	 
	Sub-Total of Airframe and Features: $***	 	Airframe Escalation Data:	 	 
	Engine Price (Per Aircraft):	 	$***	 	Base Year Index (ECI):	***	 
	Aircraft Basic Price (Excluding BFE/SPE):	$***	 	Base Year Index (CPI):	***	 
	Buyer Furnished Equipment (BFE) Estimate:	$***	 	 	 	 
	Seller Purchased Equipment (SPE) Estimate:	$***	 	 	 	 
	 	 	 	 	 	 	 
	Deposit per Aircraft:	 	$***	 	 	 	 

 

	#
    of Aircraft	Delivery
    Date	 	***	Manufacturer
    Serial Number	 	***
    Estimate	***
    Per Aircraft (Amts. Due/***. Prior to Delivery):
	Number
    of 	Factor	Actual
    or Nominal	***
    Base	***	***	***	***
	Aircraft	(Airframe)	Delivery
    ****	Price
    Per A/P	***%	***%	***%	***%
	***	***	***	***	***	***	$***	$***	$***	$***	$***
	 	Total:	***	 	 	 	 	 	 	 	 

 

  * Nominal delivery month, subject
to revision pursuant to Letter Agreement number UAL-PA-04761-LA-1801465R1 entitled "Open Matters 737-8 Aircraft and 737-10 Aircraft".

 

Note: Serial Numbers
are not yet available but even when provided will be provided as guidance only and are subject to change until delivery.

 

+ - Subject to confirmation by engine manufacturer

 

    
	UAL-PA-03776 APR: 84094.TXT	737-*** Aircraft
	 	Table 1, SA-2, Page 2
	 	 
	Boeing / United Airlines, Inc. Proprietary

     

    

 

Table 1 to Purchase Agreement No. 04761

737-*** Aircraft Delivery, Description, Price and ***

 

	Airframe Model/MTOW:	737-***	*** pounds	 	Detail Specification:	***	 
	Engine Model/Thrust:	***	*** pounds	+	Airframe Price Base Year/Escalation Formula:	***	***
	Airframe Price:	 	$***	 	Engine Price Base Year/Escalation Formula:	***	***
	*** Features:	 	$***	 	 	 	 
	Sub-Total of Airframe and Features:	$***	 	Airframe Escalation Data:	 	 
	Engine Price (Per Aircraft):	 	$***	 	Base Year Index (ECI):	***	 
	Aircraft Basic Price (Excluding BFE/SPE):	$***	 	Base Year Index (CPI):	***	 
	Buyer Furnished Equipment (BFE) Estimate:	$***	 	 	 	 
	Seller Purchased Equipment (SPE) Estimate:	$***	 	 	 	 
	 	 	 	 	 	 	 
	Deposit per Aircraft:	 	$***	 	 	 	 

 

	#
    of Aircraft	Delivery
    Date	 	***	Manufacturer
    Serial Number	 	***
    Estimate	***
    Per Aircraft (Amts. Due/***. Prior to Delivery):
	Number
    of 	Factor	Actual
    or Nominal	***
    Base	***	***	***	***
	Aircraft	(Airframe)	Delivery
    *****	Price
    Per A/P	***%	***%	***%	***%
	***	***	***	***	***	***	$***	$***	$***	$***	$***
	 	Total:	***	 	 	 	 	 	 	 	 

 

* Nominal *** month, subject to revision pursuant
to Letter Agreement number UAL-PA-04761-LA-1801465 entitled "Open Matters 737-10 Aircraft".

 

Note: Serial Numbers are not yet available but
even when provided will be provided as guidance only and are subject to change until delivery.

 

***

 

+ - Subject to confirmation by engine manufacturer
              

 

    
	UAL-PA-03776 APR: 108190.TXT	737-*** Aircraft
	 	Table 1, SA-2, Page 3
	 	 
	Boeing / United Airlines, Inc. Proprietary

     

    

 

Attachment A-1 to Letter Agreement No. UAL-PA-04761-LA-1807022R1

737-*** Aircraft Delivery, Description, Price and ***

 

	Airframe Model/MTOW:	737-***	*** pounds	 	Detail Specification:	***	 
	Engine Model/Thrust:	***	*** pounds	Subject to confirmation	Airframe Price Base Year/*** Formula:	***	***
	Airframe Price:	 	$***	 	Engine Price Base Year/*** Formula:	***	***
	*** Features:	 	$***	 	 	 	 
	Sub-Total of Airframe and Features:	 	$***	 	Airframe*** Data:	 	 
	Engine Price (Per Aircraft):	 	$***	 	Base Year Index (ECI):	***	 
	Aircraft Basic Price (Excluding BFE/SPE):	$***	 	Base Year Index (CPI):	***	 
	Buyer Furnished Equipment (BFE) Estimate:	$***	 	 	 	 
	Seller Purchased Equipment (SPE) Estimate:	$***	 	 	 	 
	 	 	 	 	 	 	 
	Deposit per Aircraft:	 	$***	 	 	 	 

 

	#
    of

 ***

Aircraft	 	 	***	***

    Expiry	 	***
    Estimate	***
    Per Aircraft (Amts. Due/*** Prior to Delivery):
	Delivery	Number
    of 	Factor	Actual
    or Nominal 	***
    Base	***	***	***	***
	Date	Aircraft	(Airframe)	Delivery
    ****	Price
    Per A/P	***%	***%	***%	***%
	***	***	***	***	***	***	***	$***	$***	$***	$***
	 	Total:	***	 	 	 	 	 	 	 	 

 

* Nominal delivery *** pursuant to §2
of Letter Agreememt UAL-PA-04761-LA-1807022 including any successor thereof.      

 

    
	UAL-PA-04761-112118-1F.TXT	  
Boeing / United Airlines, Inc. Proprietary
	 SA-2, MAX ***
Att. A-1, Page 4

     

    

 

Attachment A-2 to Letter Agreement No. UAL-PA-04761-LA-1807022R1

737-*** Option Aircraft Delivery, Description, Price
and *** 

 

	Airframe
    Model/MTOW:	737-***	***
    pounds	 	Detail
    Specification:	***	 
	 	 	 	 	 	 	 
	Engine
    Model/Thrust:	***	***
    pounds	Subject
    to confirmation	Airframe
    Price Base Year/*** Formula:	***	***
	Airframe
    Price:	 	$***	 	Engine
    Price Base Year/*** Formula:	***	***
	***
    Features:	 	$***	 	 	 	 
	Sub-Total
    of Airframe and Features:	 	$***	 	Airframe
    *** Data:	 	 
	Engine
    Price (Per Aircraft):	 	$***	 	Base
    Year Index (ECI):	***	 
	Aircraft
    Basic Price (Excluding BFE/SPE):	$***	 	Base
    Year Index (CPI):	***	 
	Buyer
    Furnished Equipment (BFE) Estimate:	$***	 	 	 	 
	Seller
    Purchased Equipment (SPE) Estimate:	$***	 	 	 	 
	 	 	 	 	 	 	 
	Deposit
    per Aircraft:	 	$***	 	 	 	 

 

	#
    of 
 ***

Aircraft	 	 	***	***

    Expiry	 	***
    Estimate	***
    Per Aircraft (Amts. Due/*** Prior to Delivery):
	Delivery	Number
    of 	Factor	Actual
    or Nominal 	***
    Base	***	***	***	***
	Date	Aircraft	(Airframe)	Delivery
    ****	Price
    Per A/P	***%	***%	***%	***%
	***	***	***	***	***	***	$***	$***	$***	$***	$***
	 	Total:	***	 	 	 	 	 	 	 	 

	 	 	 	 	 	 	 	 	 	 	 	 
	  *
    Nominal delivery *** pursuant to §2 of Letter Agreememt UAL-PA-04761-LA-1807022 including any successor thereof.

 

    
	UAL-PA-04761-112118-1F.TXT	  
Boeing / United Airlines, Inc. Proprietary
	 SA-2, MAX ***
Att. A-2, Page 5

     

    

 

AIRCRAFT CONFIGURATION

 

between

 

THE BOEING COMPANY

 

and

 

United Airlines, Inc.

 

Exhibit A to Purchase Agreement Number 04761

for 737-8 Aircraft

 

    
	UAL-PA-04761-EXA 	SA-2
	737-8 Aircraft	Page 1
	BOEING/UNITED AIRLINES, INC. PROPRIETARY

     

    

 

Exhibit A

 

AIRCRAFT CONFIGURATION

 

relating to

 

BOEING MODEL 737-8 AIRCRAFT

 

The Detail Specification
is Boeing document number *** pursuant to the provisions of Letter Agreement UAL-PA-04761-LA-1801465R1 entitled “Open Matters
737-8 Aircraft and 737-10 Aircraft”.

 

    
	UAL-PA-04761-EXA 	SA-2
	737-8 Aircraft	Page 2
	BOEING/UNITED AIRLINES, INC. PROPRIETARY

     

    

 

	***
    Number	 	ATTACHMENT
    1:  *** 737-8 ***	 	 	MAX8
 Aircraft
                                            ***$ Price Per 

                                            A/C
	 
	***	 	***	 	 	***	 
	***	 	TOTAL
    - ***:	 	$	***	 

 

    
	UAL-PA-04761-EXA 	SA-2
	737-8 Aircraft	Page 3
	BOEING/UNITED AIRLINES, INC. PROPRIETARY

     

    

 

BUYER FURNISHED EQUIPMENT VARIABLES

 

between

 

THE BOEING COMPANY

 

and

 

UNITED AIRLINES, INC.

 

Supplemental Exhibit BFE1

to Purchase Agreement Number 04761

for 737-8 Aircraft

 

    

	UAL-PA-04761-Ex BFE1 	BFE1 for 737-8 Aircraft, Page 1 	SA-2
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

     

    

 

BUYER FURNISHED EQUIPMENT VARIABLES

 

relating to

 

BOEING MODEL 737-8 AIRCRAFT

 

This Supplemental Exhibit BFE1
contains supplier selection dates, on-dock dates and other requirements applicable to the Aircraft.

 

1.            
Supplier Selection.

 

Customer will:

 

Select and notify Boeing
of the suppliers and part numbers of the following BFE items by the following dates:

 

***

 

2.            
On-dock Dates and Other Information.

 

On or before *** aircraft
delivery, Boeing will provide to Customer the BFE Requirements electronically through My Boeing Fleet (MBF in My Boeing Configuration
(MBC). These requirements may be periodically revised, setting forth the items, quantities, on-dock dates and shipping instructions
and other requirements relating to the in-sequence installation of BFE. For planning purposes, preliminary BFE on-dock dates are set
forth in Attachment 1:

 

3.             
Additional Delivery Requirements - Import.

 

Customer will be the “importer
of record” (as defined by the U.S. Customs and Border Protection) for all BFE imported into the United States, and as such,
it has the responsibility to ensure all of Customer’s BFE shipments comply with U.S. Customs Service regulations. In the event
Customer requests Boeing, in writing, to act as importer of record for Customer’s BFE, and Boeing agrees to such request, Customer
is responsible for ensuring Boeing can comply with all U.S. Customs Import Regulations by making certain that, at the time of shipment,
all BFE shipments comply with the requirements in the “International Shipment Routing Instructions”, including the Customs
Trade Partnership Against Terrorism (C-TPAT), as set out on the Boeing website referenced below. Customer agrees to include the
International Shipment Routing Instructions, including C-TPAT requirements, in each contract between Customer and BFE supplier.

 

    

	UAL-PA-04761-Ex BFE1 	BFE1 for 737-8 Aircraft, Page 2 	SA-2
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

     

    

 

ATTACHMENT 1 TO SUPPLEMENTAL EXHIBIT BFE1 TO
PURCHASE AGREEMENT NO. 04761

Preliminary On Dock Date Data:

 

***         ******

 

    
	Attachment 1 to Supplemental Exhibit BFE1	SA-2
	UAL-PA-04761-Ex BFE1	Att. 1 to BFE1 for 737-8 Aircraft, Page 1
	BOEING/UNITED AIRLINES, INC. PROPRIETARY

     

    

 

BUYER FURNISHED EQUIPMENT VARIABLES

 

between

 

THE BOEING COMPANY

 

and

 

UNITED AIRLINES, INC.

 

Supplemental Exhibit BFE1

to Purchase Agreement Number 04761

for 737-10 Aircraft

 

    
	UAL-PA-04761-Ex BFE1	SA-2 BFE1 for 737-10 Aircraft Page 1
	BOEING / UNITED AIRLINES, INC.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    PROPRIETARY

     

    

 

BUYER FURNISHED EQUIPMENT VARIABLES

 

relating to

 

BOEING MODEL 737-10 AIRCRAFT

 

This Supplemental Exhibit BFE1
contains supplier selection dates, on-dock dates and other requirements applicable to the Aircraft.

 

1.            
Supplier Selection.

 

Customer will:

 

Select and notify Boeing
of the suppliers and part numbers of the following BFE items by the following dates:

 

***

 

2.           
On-dock Dates and Other Information.

 

On or before *** aircraft
delivery, Boeing will provide to Customer the BFE Requirements electronically through My Boeing Fleet (MBF in My Boeing Configuration
(MBC). These requirements may be periodically revised, setting forth the items, quantities, on-dock dates and shipping instructions
and other requirements relating to the in-sequence installation of BFE. For planning purposes, preliminary BFE on-dock dates are set
forth in Attachment 1.

 

3.            
Additional Delivery Requirements - Import.

 

Customer will be the “importer
of record” (as defined by the U.S. Customs and Border Protection) for all BFE imported into the United States, and as such,
it has the responsibility to ensure all of Customer’s BFE shipments comply with U.S. Customs Service regulations. In the event
Customer requests Boeing, in writing, to act as importer of record for Customer’s BFE, and Boeing agrees to such request, Customer
is responsible for ensuring Boeing can comply with all U.S. Customs Import Regulations by making certain that, at the time of shipment,
all BFE shipments comply with the requirements in the “International Shipment Routing Instructions”, including the Customs
Trade Partnership Against Terrorism (C-TPAT), as set out on the Boeing website referenced below. Customer agrees to include the
International Shipment Routing Instructions, including C-TPAT requirements, in each contract between Customer and BFE supplier.

 

    
	UAL-PA-04761-Ex BFE1	SA-2 BFE1 for 737-10 Aircraft Page 2
	BOEING / UNITED AIRLINES, INC.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    PROPRIETARY

     

    

 

ATTACHMENT 1 TO SUPPLEMENTAL
EXHIBIT BFE1 TO PURCHASE AGREEMENT NO. 04761

Preliminary On Dock
Date Data for 737-10 Aircraft As of the Date of Supplemental Agreement No. 2

 

	Nominal

                                                                                Del
                                            Date
	Aircraft
    Qty	***	***	***	***	***	***	***	***	***	***
	***	***	***	***	***	***	***	***	***	***	***	***
	***	***	 	 	 	 	 	 	 	 	 	 

 

    

	Attachment 1 to Supplemental Exhibit BFE1	 
	UAL-PA-04761-Ex BFE1	SA-2 BFE1 for 737-10 Aircraft Page 2
	BOEING / UNITED AIRLINES, INC.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 PROPRIETARY

     

    

 

	 	The Boeing Company
	P.O. Box 3707
	Seattle, WA 98124 2207

 

UAL-PA-04761-LA-1801465R1

 

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

		Subject:	Open Matters 737-8 Aircraft and 737-10
                                            Aircraft

 

		Reference:	Purchase Agreement No. 04761 (Purchase
                                            Agreement) between The Boeing Company (Boeing) and United Airlines, Inc. (Customer)
                                            relating to Model 737 MAX aircraft (Aircraft)

 

This letter agreement (Letter
Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the
same meaning as in the Purchase Agreement. This Letter Agreement supersedes and replaces in its entirety Letter Agreement UAL-PA-04761-LA-1801465.

 

Given the long period of
time between Purchase Agreement signing and delivery of Customer’s first 737-10 Aircraft and first 737-8 Aircraft; and the continued
development of the 737 MAX program, certain elements have not yet been defined. In consideration, Boeing and Customer agree to work together
as the configuration of Customer’s Boeing Model 737-8 Aircraft and 737-10 aircraft develops as follows:

 

1.                 
Aircraft Delivery Schedule.

 

1.1             
The scheduled delivery position of the 737-8 Aircraft and the 737-10 Aircraft, as of the date of this Letter Agreement is listed
in Table 1 of the Purchase Agreement and provides the delivery schedule in *** delivery windows consisting of a nominal delivery month
(Nominal Delivery Month***. No later than *** prior to Nominal Delivery Month of Customer’s first 737-8 Aircraft and 737-10
Aircraft, as applicable, in each calendar year, Boeing will provide written notice with a *** of the scheduled delivery month for each
737-8 Aircraft and each 737-10 Aircraft, as applicable, with a Nominal Delivery Month in such calendar year.

 

1.2             
Customer and Boeing will consult on a frequent basis to keep each other informed as to Customer’s fleet plans and Boeing’s
production plans in order to meet the requirements of both parties. Based on such reviews and discussions, Boeing will use commercially
reasonable efforts to meet Customer’s fleet needs when providing the notices required by Article 1.1. Such notices provided by
Boeing will constitute an amendment to Table 1 of the Purchase Agreement. The amended Table 1 shall be the scheduled delivery positions
for the purposes of applying all provisions of the Purchase Agreements, including without limitation the BFE on-dock dates, and ***.

  

    	UAL-PA-04761-LA-1801465R1	SA-2
	Open Matters	Page 1
	 	 
	BOEING/ UNITED AIRLINES, INC. PROPRIETARY

     

    

 

		 

 

2.                 
 Aircraft Configuration.

 

2.1       The
initial configuration of Customer's Model 737-8 Aircraft and 737-10 Aircraft has been defined by Boeing 737-7, 737-8, 737-8200, 737-9,
737-10 Airplane Description Document No*** as described in Article 1 and Exhibit A of the Purchase Agreement (Initial Configuration).
Final configuration of the 737-8 Aircraft and the 737-10 Aircraft (Final Configuration) will be completed using the then-current
Boeing configuration documentation in accordance with the following schedule:

 

2.1.1       
For the 737-10 Aircraft, Boeing has provided Customer with Customer Specific *** Selection packages and Customer has provided
its selections.

 

2.1.2       
For the 737-8 Aircraft: No later than ***, Boeing will provide Customer with a proposal for *** features that can be incorporated
into the 737-8 Aircraft during production.

 

2.1.3       
Customer will then have *** to accept or reject the *** 737-8 Aircraft features which will establish Final Configuration of
the 737-8 Aircraft.

 

2.1.4       
Within *** following Final Configuration of the applicable Aircraft, Boeing and Customer will execute a written amendment to the
Purchase Agreement which will reflect the following:

 

2.1.4.1 
Changes applicable to the basic Model 737-8 and 737-10 aircraft, as applicable, which are developed by Boeing between the date
of signing of the Purchase Agreement and date of Final Configuration.

 

2.1.4.2 
Incorporation into Exhibit A of the Purchase Agreement, by written amendment, those *** features which have been agreed to
by Customer and Boeing (Customer Configuration Changes);

 

2.1.4.3 
Revisions to the Supplemental Exhibit BFE1 to reflect the selection dates and on-dock dates of BFE;

 

2.1.4.4 
Changes to the *** Features Prices, and *** to adjust for the difference, if any, between the prices estimated in Table 1
of the Purchase Agreement for *** features reflected in the *** and the actual prices of the *** features reflected in the Customer Configuration
Changes.

 

3.                 
Assignment.

 

Except as provided in Letter
Agreement No. UAL-PA-04761-LA-1801470, the rights and obligations described in this Letter Agreement are provided to Customer in consideration
of Customer’s becoming the operator of the Aircraft and cannot be assigned in whole or, in part.

 

4.                 
Confidential Treatment.

  

    	UAL-PA-04761-LA-1801465R1	SA-2
	Open Matters	Page 2
	 	 
	BOEING/ UNITED AIRLINES, INC. PROPRIETARY

     

    

 

 

 

Customer and Boeing understand
that certain commercial and financial information contained in this Letter Agreement are considered by Boeing and Customer as confidential
and are subject to the terms and conditions set forth in Letter Agreement No. UAL-PA-04761-LA-1801472.

 

Very truly yours,

 

	THE BOEING COMPANY	 
	 	 
	By: 	/s/
    Irma L. Krueger	 
	 	 
	Its: 	Attorney-in-Fact	 
	 	 
	ACCEPTED AND AGREED
    TO this	 
	 	 
	Date:   	December
    12, 2018	 
	 	 
	UNITED AIRLINES,
    INC.	 
	 	 
	By: 	/s/
    Gerald Laderman	 
	 	 
	Its: 	Executive
    Vice President Finance and Chief Financial Officer	 

 

    	UAL-PA-04761-LA-1801465R1	SA-2
	Open Matters	Page 3
	 	 
	BOEING/ UNITED AIRLINES, INC. PROPRIETARY

     

    

 

 

	 	The Boeing Company 

  P.O. Box 3707 

  Seattle, WA 98124-2207

 

 

UAL-PA-04761-LA-1801467R2

 

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

		Subject:	Special Matters – 737-10 Aircraft
                                            and 737-9 Aircraft
	 	 	 

		Reference:	Purchase Agreement No.  04761 (Purchase
                                            Agreement) between The Boeing Company (Boeing) and United Airlines, Inc. (Customer)
                                            relating to Model 737 MAX aircraft (Aircraft)

 

This letter agreement (Letter
Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the
same meaning as in the Purchase Agreement. This Letter Agreement supersedes and replaces in its entirety Letter Agreement UAL-PA-04761-LA-1801467R1.

 

1.            
***.

 

1.1          737-10
***.

 

At the time of delivery of
each 737-10 Aircraft, Boeing *** to Customer a ***
the 737-10 *** which shall equal ***
(737-10 ***).

 

1.2         
***.

 

At the time of delivery of
the ***, Boeing *** to Customer ***.

 

1.3          737-9
Aircraft ***.

 

At the time of delivery of
each 737-9 Aircraft, Boeing *** to Customer a ***
737-9 Aircraft ***

 

1.4          737-9
Aircraft ***.

 

At the time of delivery of
each 737-9 Aircraft, Boeing *** Boeing represents that the ***
of this 737-*** is consistent with the terms of Letter Agreement 6-1162-KKT-080,
as amended.

 

1.5          737-8
Aircraft ***.

 

At the time of delivery of
each 737-8 Aircraft and each 737-8 *** Aircraft (each a 737-8 Aircraft for purposes
of this Letter Agreement), Boeing ***

 

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1.6          737-8
***

 

At the time of delivery of
each 737-8 Aircraft, Boeing *** Boeing represents that the ***
of this 737-*** is consistent with the terms of Letter Agreement 6 1162 KKT-080,
as amended.

 

1.7          Special
737-8 ***.

 

***

 

2.           
***.

 

Unless otherwise noted, the
amounts of the *** stated in (i) Paragraphs 1.1 through 1.2 ***
are in *** for 737-10 Aircraft; and (i)  Paragraphs 1.3 through 1.7
*** are in ***. The ***
to the scheduled month of the respective Aircraft delivery pursuant to the Airframe ***
formula set forth in the Purchase Agreement applicable to the Aircraft. The *** may,
at the election of Customer, be ***.

 

3.             737
Supplier Management.

 

It is Boeing’s
737 MAX design intent the 737 MAX ***. If a ***
leads to a *** to be available only through a ***
for the 737 MAX where ***, then ***
for such affected *** will have the necessary agreements in place to provide 737 MAX ***.
These ***, known as *** will include (but not
be limited to) *** that the terms of such ***
are commercially reasonable

 

4.            Supplier
Diversity.

 

Customer and Boeing agree
to work towards a mutually agreeable solution for meeting diversity requirements in the supply base. Notwithstanding the foregoing sentence,
Boeing agrees to (i) identify parts and equipment where Customer makes the procurement decision for potential opportunities; (ii) submit
indirect reports until other options are vetted and approved; and (iii) continue to engage with Customer with regard to supplier diversity
to ensure Boeing supports Customer’s requirements.

 

5.            Assignment.

 

Unless otherwise noted herein,
*** described in this Letter Agreement are provided as a ***
to Customer and in consideration of Customer’s taking title to the Aircraft at time of delivery and becoming the operator
of the Aircraft. Except as provided in Letter Agreement No. UAL-PA-04761-LA-1801472, this Letter Agreement cannot be assigned, in whole
or in part, without the prior written consent of Boeing. For purposes of the ***

 

6.             Confidentiality

 

Customer and Boeing understand
that certain commercial and financial information contained in this Letter Agreement are considered by Boeing and Customer as confidential
and are subject to the terms and conditions set forth in Letter Agreement No. UAL-PA-04761-LA-1801470.

 

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Very truly yours,

 

	THE BOEING COMPANY	 
	 	 
	By:	/s/
    Irma L. Krueger	 
	 	 
	Its:	Attorney-in-Fact	 

 

    	UAL-PA-04761-LA-1801467R2
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	ACCEPTED AND AGREED TO this	 
	 	 
	Date:	December
    12, 2018	 

 

	UNITED AIRLINES, INC.	 
	 	 
	By:	/s/
    Gerald Laderman	 
	 	 
	Its:	Executive Vice
    President and Chief Financial Officer	 

 

    	UAL-PA-04761-LA-1801467R2
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	 	The
                                            Boeing Company

                                            P.O. Box 3707

                                            Seattle, WA 98124-2207

 

UAL-PA-04761-LA-1807022R1

 

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

		Subject:	***
                                            Aircraft – 737-*** and 737-***

 

		Reference:	Purchase
                                            Agreement No. PA-04761 (Purchase Agreement) between The Boeing Company (Boeing)
                                            and United Airlines, Inc. (Customer) relating to Model 737 MAX aircraft (Aircraft)

 

This letter agreement (Letter
Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the
same meaning as in the Purchase Agreement.

 

1.             Right
to Purchase *** Aircraft

.

Subject to the terms and
conditions contained in this Letter Agreement, in addition to the Aircraft described in both Table 1’s to the Purchase Agreement
as of the date of execution of this Letter Agreement, Customer will have the *** Model 737-*** aircraft and 737-*** Aircraft as
*** aircraft (*** Aircraft).

 

2.             Delivery.

 

The number of aircraft and
delivery months are listed in Attachment A-1 and A-2 (collectively Attachment A) to this Letter Agreement. The scheduled delivery
position of each *** Aircraft listed in Attachment A provides the delivery schedule in *** consisting of a nominal delivery month (Nominal
Delivery Month) ***. No later than *** Nominal Delivery Month of Customer’s first *** Aircraft in each calendar year, Boeing
will provide written notice with a *** Attachment A of the scheduled delivery month for each *** Aircraft with a Nominal Delivery Month
in such calendar year.

 

3.             Configuration.

 

3.1         Subject
to the provisions of Article 3.2, below, the configuration for the *** Aircraft will be the Detail Specification for Boeing Model
737-*** and 737-*** aircraft, as applicable, at the revision level in effect at the time of Definitive Agreement (as defined below).
Such Detail Specification *** applicable to the Detail Specification that are developed by Boeing between the *** (as defined below)
and the signing of the Definitive Agreement, (ii) changes required to obtain required regulatory certificates, and (iii) other
changes as mutually agreed.

 

3.2         Subject
to ***, the *** Aircraft ***, provided that it can achieve *** which would result pursuant to the provisions of Article 3.1.

 

4.             Price.

 

4.1         The
Airframe Price and *** Features Prices for each of the *** Aircraft is identified in Attachment A to this Letter Agreement.  ***.

 

4.2         The
Airframe Price, *** Features Prices, and Aircraft Basic Price for each of the *** Aircraft shall *** in accordance with the terms set
forth in Article 2.1.5 (***) of the AGTA.

 

4.3       The
*** Base Price shall be developed in accordance with the terms of the Purchase Agreement and determined at the time of Definitive Agreement.

 

	UAL-PA-04761-LA-1807022R1	SA-2

 

	***Aircraft – 737-***	Page 1

BOEING / UNITED AIRLINES, INC. PROPRIETARY

     

     

    

 

 

 

5.             Payment.

 

5.1         ***

 

5.2         Notwithstanding
the amount shown in Attachment A, the *** Deposit will be *** for each *** Aircraft.

 

5.3         At
Definitive Agreement for the *** Aircraft,  *** will be payable as specified in the Purchase Agreement. The remainder of
the Aircraft Price for the *** Aircraft will be paid at the time of delivery.

 

6.            
***.

 

6.1         Customer
may *** by giving written notice to Boeing on or before the date ***

 

6.2         After
receipt of Customer’s ***.

 

6.3         ***

 

7.             Definitive
Agreement.

 

Following Customer’s
*** the parties will sign a definitive agreement for the purchase of such *** Aircraft (Definitive Agreement) within ***. The
Definitive Agreement will include the provisions of the Purchase Agreement as modified to reflect the provisions of this Letter Agreement.
In the event the parties have not entered into a Definitive Agreement within ***, either party ***. If Customer and Boeing fail to enter
into the Definitive Agreement, Boeing will ***.

 

8.             Assignment.

 

Except as provided in Letter
Agreement No. UAL-PA-04761-LA-1801472, the rights and obligations described in this Letter Agreement are provided to Customer in consideration
of Customer’s becoming the operator of the Aircraft and cannot be assigned in whole or in part.

 

9.             Confidential
Treatment.

 

Customer and Boeing understand
that certain commercial and financial information contained in this Letter Agreement are considered by Boeing and Customer as confidential
and are subject to the terms and conditions set forth in Letter Agreement No. UAL-PA-04761-LA-1801470.

Very truly yours,

 

	THE BOEING
    COMPANY	 
	 	 
	By:	/s/
    Irma L. Krueger	 
	 	 
	Its:	Attorney-in-Fact	 

 

	UAL-PA-04761-LA-1807022R1	SA-2

	***Aircraft – 737-***	Page 2

BOEING / UNITED AIRLINES, INC. PROPRIETARY

 

     

     

    

 

 

 

	ACCEPTED AND AGREED
    TO this
	 
	Date:	December
    12, 2018	 

 

	UNITED
                                            AIRLINES, INC.

                                                                                 

	 
	By:	/s/
    Gerald Laderman	 
	 
	Its:	Executive
    Vice President and Chief Financial Officer	 

 

 

	UAL-PA-04761-LA-1807022R1	SA-2

	***Aircraft – 737-***	Page 3

BOEING / UNITED AIRLINES, INC. PROPRIETARY

 

     

     

    

 

Attachment A-1 to Letter
Agreement No. UAL-PA-04761-LA-1807022R1

737-*** Aircraft Delivery,
Description, Price and ***

 

	Airframe Model/MTOW:	737-***	*** pounds	 	Detail Specification:	***	 
	 	 	 	 	 	 	 
	Engine Model/Thrust:	***	*** pounds	Subject to confirmation	Airframe Price Base Year/*** Formula:	***	***
	Airframe Price:	 	$***	 	Engine Price Base Year/*** Formula:	***	***
	*** Features:	 	$***	 	 	 	 
	Sub-Total of Airframe and Features:	 	$***	 	Airframe*** Data:	 	 
	Engine Price (Per Aircraft):	 	$***	 	Base Year Index (ECI):	***	 
	Aircraft Basic Price (Excluding
    BFE/SPE):	$***	 	Base Year Index (CPI):	***	 
	Buyer Furnished Equipment (BFE)
    Estimate:	$***	 	 	 	 
	Seller Purchased Equipment (SPE)
    Estimate:	$***	 	 	 	 
	 	 	 	 	 	 	 
	Deposit per Aircraft:	 	$***	 	 	 	 

 

	#
    of *** Aircraft	 	 	***	***
    Expiry	 	***
    Estimate	***
    Per Aircraft (Amts. Due/*** Prior to Delivery):
	Delivery	Number
    of 	Factor	Actual
    or Nominal 	***
    Base	***	***	***	***
	Date	Aircraft	(Airframe)	Delivery
    ****	Price
    Per A/P	***%	***%	***%	***%
	***	***	***	***	***	***	***	$***	$***	$***	$***
	 	Total:	***	 	 	 	 	 	 	 	 

 

* Nominal delivery *** pursuant to §2 of Letter Agreememt UAL-PA-04761-LA-1807022
including any successor thereof.

 

    	UAL-PA-04761-112118-1F.TXT	  
Boeing / United Airlines, Inc. Proprietary
	 SA-2, MAX ***
Att. A-1, Page 1

     

    

 

Attachment A-2 to Letter Agreement No. UAL-PA-04761-LA-1807022R1

737-***Aircraft Delivery, Description, Price and ***

 

	Airframe
    Model/MTOW:	737-***	***
    pounds	 	Detail
    Specification:	***	 
	Engine
    Model/Thrust:	CFMLEAP-1B27	***
    pounds	 	Airframe
    Price Base Year/Escalation Formula:	***	***
	Airframe
    Price:	 	$***	 	Engine Price Base Year/Escalation Formula:	***	***
	***
    Features:	 	$***	 	 	 	 
	Sub-Total
    of Airframe and Features:	 	$***	 	Airframe
    Escalation Data:	 	 
	Engine
    Price (Per Aircraft):	 	$***	 	Base
    Year Index (ECI):	***	 
	Aircraft
    Basic Price (Excluding BFE/SPE):	$***	 	Base
    Year Index (CPI):	***	 
	Buyer
    Furnished Equipment (BFE) Estimate:	$***	 	 	 	 
	Seller
    Purchased Equipment (SPE) Estimate:	$***	 	 	 	 
	 	 	 	 	 	 	 
	Deposit
    per Aircraft:	 	$***	 	 	 	 

 

	#
    of Option Aircraft	 	 	***	***

    Expiry	 	***
    Estimate	***
    Per Aircraft (Amts. Due/*** Prior to Delivery):
	Delivery	Number
    of 	Factor	Actual
    or Nominal 	***
    Base	***	***	***	***
	Date	Aircraft	(Airframe)	Delivery
    ****	Price
    Per A/P	 	 	 	 
	***	***	***	***	***	***	***	$***	$***	$***	$***
	 	Total:	***	 	 	 	 	 	 	 	 

 

* Nominal delivery *** pursuant to §2 of Letter
Agreememt UAL-PA-04761-LA-1807022 including any successor thereof.

 

Execution Version SA-2 to
737 Purchase Agreement No. 04761, Page 55 of 67

 

    
	UAL-PA-04761-112118-1F.TXT	  
Boeing / United Airlines, Inc. Proprietary
	 SA-2, MAX ***
Att. A-2, Page 1

 

     

    

 

	 	The
                                            Boeing Company

                                                                                                                                                P.O.
                                            Box 3707

                                                                                                                                                Seattle,
                                            WA 98124 2207

 

UAL-PA-04761-LA-1807490R1

 

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

		Subject:	737*** Aircraft and 737***

 

		Reference:	Purchase Agreement No. PA-04761
                                            (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines,
                                            Inc. (Customer) relating to Model 737 MAX aircraft (Aircraft)

 

This letter agreement (Letter
Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the
same meaning as in the Purchase Agreement. This Letter Agreement supersedes and replaces in its entirety Letter Agreement UAL-PA-04761-LA-1807490.

 

		1.	Definitions.

 

*** Notice means the
written communication provided by Boeing to Customer in accordance with the requirements of Article 4.1, below.

 

Program Aircraft means
each 737-*** Aircraft and 737-*** Aircraft specified in Table 1 of the Purchase Agreement as of the date of this Letter Agreement
and any 737-*** Aircraft and any 737-*** Aircraft arising as a result of *** of Customer’s aircraft model ***.

 

		2.	Applicability.

 

Notwithstanding any other
provision of the Purchase Agreement to the contrary, the parties agree that the *** for the Airframe Price and *** Features Prices for
each Program Aircraft shall be determined in accordance with this Letter Agreement.

 

		3.	*** Forecast.

 

Boeing will release an ***
forecast in *** of each year based on Boeing’s then current standard ***. Only one *** forecast shall be used to conduct the ***
analysis performed in accordance with Article 4.1, below, for a given Program Aircraft. The *** forecast applicable to a given Program
Aircraft is set forth in Attachment A.

 

		4.	***

 

4.1.4       
In the event that Boeing *** the *** Notice as detailed in Article 4.1.2 or Article 4.1.3 and Customer ***, then Customer ***
the Purchase Agreement with respect to such affected Program Aircraft.

 

4.2             
If Boeing provides Customer the *** described in Article 4.1.2 or Article 4.1.3 above, then Customer shall notify Boeing
*** contained in Articles 4.1.2, 4.1.3, or 4.1.4 above within *** of its receipt of the *** Notice from Boeing. In the event Customer
*** in accordance with Article 4.1.4 above, then Boeing ***.

 

    	 UAL-PA-04761-LA-1807490R1
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	 	 SA-2
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	BOEING / UNITED AIRLINES, INC. PROPRIETARY

     

    

 

 

 

4.2.1       
 Within *** of Boeing’s receipt of *** notice for any such ***Program Aircraft under Article 4.2 above, Boeing ***
written notice to Customer ***.

 

4.2.2       
Should Customer *** any notice to Boeing in accordance with Article 4.2 above, then the *** for such Program Aircraft shall
be calculated in accordance with Article 4.1.2.

 

4.3             
In the event that the *** of a Program Aircraft that is subject to either Article 4.1.1, Article 4.1.2 or Article 4.1.3 above,
*** applicable to such Program Aircraft will be determined pursuant to Article 5 below.

 

		5.	***

 

		6.	***.

 

		7.	Applicability to ***.

 

The ***, identified in the
Purchase Agreement as subject to *** to Supplemental Exhibit AE1, and which pertains to the Program Aircraft ***.

 

		8.	Assignment.

 

Except as provided in Letter
Agreement No. UAL-PA-04761-LA-1801472, the rights and obligations described in this Letter Agreement are provided to Customer in consideration
of Customer’s becoming the operator of the Aircraft and cannot be assigned in whole or, in part.

 

		9.	Confidential Treatment.

 

Customer and Boeing understand
that certain commercial and financial information contained in this Letter Agreement are considered by Boeing and Customer as confidential
and are subject to the terms and conditions set forth in Letter Agreement No. UAL-PA-04761-LA-1801470.

 

Very truly yours,

 

	THE
    BOEING COMPANY
	 
	By	/s/
    Irma L. Krueger	 
	 
	Its	Attorney-in-Fact	 

 

    	 UAL-PA-04761-LA-1807490R1
*** 737-*** & 737-*** Aircraft
	 	 SA-2
Page 2

	BOEING/UNITED AIRLINES, INC. PROPRIETARY

     

    

 

 

 

	 	 
	ACCEPTED
    AND AGREED TO this	 
	 	 
	Date:	December
    12, 2018	 
	 	 
	UNITED
    AIRLINES, INC.	 
	 	 
	By	/s/
    Gerald Laderman	 
	 	 
	Its	Executive
    Vice President Finance and Chief Financial Officer	 

 

    	 UAL-PA-04761-LA-1807490R1
*** 737-*** & 737-*** Aircraft
	 	 SA-2
Page 3

	BOEING/UNITED AIRLINES, INC. PROPRIETARY

     

    

 

 

 

ATTACHMENT A

*** Forecast & *** Notice Date

 

	***

    Forecast	Applicable
    to Program Aircraft 

    Delivering in Time Period	***
    

    Notice Date
	***	***	***

 

    	 UAL-PA-04761-LA-1807490R1
*** 737-*** & 737-*** Aircraft
	 	 SA-2
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	BOEING/UNITED AIRLINES, INC. PROPRIETARY

     

    

 

 

 

ATTACHMENT B

*** Factors - *** Base Year

 

***

 

    	 UAL-PA-04761-LA-1807490R1
*** 737-*** & 737-*** Aircraft
	 	 SA-2
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	BOEING/UNITED AIRLINES, INC. PROPRIETARY

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