Document:

EX-10.174

 Exhibit 10.174 

CONFIDENTIAL MATERIAL APPEARING IN THIS DOCUMENT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION IN ACCORDANCE WITH THE
SECURITIES ACT OF 1933, AS AMENDED, AND RULE 24B-2 PROMULGATED THEREUNDER. OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS. 

Supplemental Agreement No. 13 

to 
 Purchase Agreement Number
03784 
 Between 
 The Boeing
Company 
 and 
 United
Airlines, Inc. 
 Relating to Boeing Model 737NG Aircraft 

THIS SUPPLEMENTAL AGREEMENT is entered into as of December 27th, 2016 by and between THE BOEING COMPANY (Boeing) and UNITED
AIRLINES, INC. (Customer); 
 WHEREAS, the parties hereto entered into Purchase Agreement Number 03784 dated July 12, 2012
(Purchase Agreement), as amended and supplemented, relating to the purchase and sale of Boeing Model 737NG aircraft (Aircraft for all purposes within the Purchase Agreement); and 

WHEREAS, Customer and Boeing agree to cross model substitute four (4) 737-700 aircraft with four (4) 737-800 aircraft as specified below in Figure 1: 
 Figure 1 

 

									
	 	  	 Aircraft Type

at SA-12
	  	 Delivery Month

at SA-12
	  	 Aircraft Type

as of SA-13
	  	 New Delivery

Month

	1	  	737-700	  	***-2017	  	737-800	  	***-2017
	2	  	737-700	  	***-2017	  	737-800	  	***-2017
	3	  	737-700	  	***-2017	  	737-800	  	***-2017
	4	  	737-700	  	***-2017	  	737-800	  	***-2017

 Each resulting 737-800 aircraft shall be designated as 737-800 substitution aircraft (737-800 Substitution Aircraft). 

  

					
	
UAL-PA-03784
	 	SA-13	  	Page 1
		 	BOEING / UNITED AIRLINES PROPRIETARY	  	

 Supplemental Agreement No. 13 to 

Purchase Agreement PA-03784 
  

 WHEREAS, Customer and Boeing agree to cross model substitute sixty-one (61) 737-700 aircraft
with sixty-one (61) 737-9 aircraft as specified further in Purchase Agreement 3776 and specified below in Figure 2 and to incorporate applicable amendments to the
Purchase Agreement: 
 Figure 2 

 

									
	 	  	 Aircraft

Type at
 SA-12
	  	 Delivery

Month at
 SA-12
	  	 Aircraft

Type as of

SA-13
	  	 New

Delivery

Month

	 1
	  	737-700	  	***	  	737-9	  	***
	 2
	  	737-700	  	***	  	737-9	  	***
	 3
	  	737-700	  	***	  	737-9	  	***
	 4
	  	737-700	  	***	  	737-9	  	***
	 5
	  	737-700	  	***	  	737-9	  	***
	 6
	  	737-700	  	***	  	737-9	  	***
	 7
	  	737-700	  	***	  	737-9	  	***
	 8
	  	737-700	  	***	  	737-9	  	***
	 9
	  	737-700	  	***	  	737-9	  	***
	 10
	  	737-700	  	***	  	737-9	  	***
	 11
	  	737-700	  	***	  	737-9	  	***
	 12
	  	737-700	  	***	  	737-9	  	***
	 13
	  	737-700	  	***	  	737-9	  	***
	 14
	  	737-700	  	***	  	737-9	  	***
	 15
	  	737-700	  	***	  	737-9	  	***
	 16
	  	737-700	  	***	  	737-9	  	***
	 17
	  	737-700	  	***	  	737-9	  	***
	 18
	  	737-700	  	***	  	737-9	  	***
	 19
	  	737-700	  	***	  	737-9	  	***
	 20
	  	737-700	  	***	  	737-9	  	***
	 21
	  	737-700	  	***	  	737-9	  	***
	 22
	  	737-700	  	***	  	737-9	  	***
	 23
	  	737-700	  	***	  	737-9	  	***
	 24
	  	737-700	  	***	  	737-9	  	***
	 25
	  	737-700	  	***	  	737-9	  	***
	 26
	  	737-700	  	***	  	737-9	  	***
	 27
	  	737-700	  	***	  	737-9	  	***
	 28
	  	737-700	  	***	  	737-9	  	***
	 29
	  	737-700	  	***	  	737-9	  	***
	 30
	  	737-700	  	***	  	737-9	  	***
	 31
	  	737-700	  	***	  	737-9	  	***

									
	 	  	 Aircraft

Type at
 SA-12
	  	 Delivery

Month at
 SA-12
	  	 Aircraft

Type as of

SA-13
	  	 New

Delivery

Month

	 32
	  	737-700	  	***	  	737-9	  	***
	 33
	  	737-700	  	***	  	737-9	  	***
	 34
	  	737-700	  	***	  	737-9	  	***
	 35
	  	737-700	  	***	  	737-9	  	***
	 36
	  	737-700	  	***	  	737-9	  	***
	 37
	  	737-700	  	***	  	737-9	  	***
	 38
	  	737-700	  	***	  	737-9	  	***
	 39
	  	737-700	  	***	  	737-9	  	***
	 40
	  	737-700	  	***	  	737-9	  	***
	 41
	  	737-700	  	***	  	737-9	  	***
	 42
	  	737-700	  	***	  	737-9	  	***
	 43
	  	737-700	  	***	  	737-9	  	***
	 44
	  	737-700	  	***	  	737-9	  	***
	 45
	  	737-700	  	***	  	737-9	  	***
	 46
	  	737-700	  	***	  	737-9	  	***
	 47
	  	737-700	  	***	  	737-9	  	***
	 48
	  	737-700	  	***	  	737-9	  	***
	 49
	  	737-700	  	***	  	737-9	  	***
	 50
	  	737-700	  	***	  	737-9	  	***
	 51
	  	737-700	  	***	  	737-9	  	***
	 52
	  	737-700	  	***	  	737-9	  	***
	 53
	  	737-700	  	***	  	737-9	  	***
	 54
	  	737-700	  	***	  	737-9	  	***
	 55
	  	737-700	  	***	  	737-9	  	***
	 56
	  	737-700	  	***	  	737-9	  	***
	 57
	  	737-700	  	***	  	737-9	  	***
	 58
	  	737-700	  	***	  	737-9	  	***
	 59
	  	737-700	  	***	  	737-9	  	***
	 60
	  	737-700	  	***	  	737-9	  	***
	 61
	  	737-700	  	***	  	737-9	  	***

 
 

  

					
	
UAL-PA-03784
	 	SA-13	  	Page 2
		 	BOEING / UNITED AIRLINES PROPRIETARY	  	

 Supplemental Agreement No. 13 to 

Purchase Agreement PA-03784 
  

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

	1.	Table of Contents, Tables, Exhibits, Supplemental Exhibits, and Letter Agreements: 

1.1 The “Table of Contents” is deleted in its entirety and replaced with the attached “Table of Contents” (identified by “SA-13”). 
 1.2 Table 1B entitled “2016 737-700 Aircraft Delivery, Description, Price and
***” is deleted in its entirety due to elimination of 2016 737-700 Aircraft from the Purchase Agreement. 

1.3 Table 1D entitled “Aircraft Information Table –737-800 Substitution Aircraft” is
added to the Purchase Agreement to incorporate the 737-800 Substitution Aircraft. 
 1.4 Exhibit A1
entitled “Aircraft Configuration - 2016 737-700 Aircraft” is deleted in its entirety due to elimination of 2016 737-700 Aircraft from the Purchase Agreement.

 1.5 Supplemental Exhibit BFE2 entitled “Buyer Furnished Equipment Variables for 2016 737-700 Aircraft” and Attachment A1
thereto entitled “Attachment A1: BFE Variables for the *** 2016 737-700 Aircraft Incorporated by SA-11” are deleted in their entirety due to elimination of
2016 737-700 Aircraft from the Purchase Agreement. 
 1.6 Attachment A2 to Supplemental Exhibit BFE3
entitled “Buyer Furnished Equipment Variables for Firm 737-800 Aircraft and 737-800 Substitution Aircraft” is added to the Purchase Agreement. 

1.7 Letter Agreement UAL-PA-03784-LA-1207879R4 entitled “737-700 *** Aircraft” is deleted in its entirety due to expiration of Customer’s rights in 737-700 *** Aircraft. 

1.8 Letter Agreement UAL-PA-03784-LA-1208155R2 entitled “*** Matters: 737-900ER and 2016 737-700 Aircraft” is deleted in its entirety and replaced with UAL-PA-03784-LA-1208155R3 entitled “737-900ER, Firm
737-800 Aircraft and 737-800 Substitution Aircraft” to reflect addition of 737-800 Substitution Aircraft and elimination of 2016
737-700 Aircraft from the Purchase Agreement. 
 1.9 Letter Agreement
UAL-PA-03784-LA-1208156R1 entitled “*** for the 737NG Aircraft” is deleted in its entirety and replaced with UAL-PA-03784- LA-1208156R2 entitled “*** for the 737NG Aircraft” to reflect addition of Firm 737-800 Aircraft, 737-800
Substitution Aircraft and elimination of 2016 737NG *** Aircraft from the Purchase Agreement. 
 1.10 Letter Agreement UAL-PA-03784-LA-1208172 entitled “***” is deleted in its entirety and replaced with UAL-PA-03784- LA-1208172R1 entitled “***” to reflect revised corrected definition of Aircraft incorporated by this
Supplemental Agreement No. 13. 

  

					
	
UAL-PA-03784
	 	SA-13	  	Page 3
		 	BOEING / UNITED AIRLINES PROPRIETARY	  	

 Supplemental Agreement No. 13 to 

Purchase Agreement PA-03784 
  

 1.11 Letter Agreement UAL-PA-03784-LA-1208173 entitled *** is deleted in its entirety and replaced with UAL-PA-03784-LA-1208173R1 entitled *** to reflect revised corrected definition of Aircraft incorporated by this Supplemental Agreement No. 13. 

1.12 Letter Agreement
UAL-PA-03784-LA-1208939 entitled “Aircraft Model ***” (relating to 737-700 and 737-800 aircraft) is deleted in its entirety due to agreement by the parties that there will be no *** permitted for any of the 737-800 Substitution Aircraft. 

1.13 Letter Agreement
UAL-PA-03784-LA-1504843 entitled “Open Matters – 2016 737-700 Aircraft” is
deleted in its entirety due to elimination of 2016 737-700 Aircraft from the Purchase Agreement. 

1.14 Letter Agreement UAL-PA-03784-LA-1504844 entitled “Special Matters-2016 737-700 Aircraft” is deleted in its entirety due to elimination of 2016 737-700 Aircraft from the Purchase Agreement. 
 1.15 Letter Agreement UAL-PA-03784-LA-1600041 entitled “Special Matters – Firm 737-800 Aircraft, as defined in Supplemental Agreement
No. 10 to the Purchase Agreement” is deleted in its entirety and replaced with Letter Agreement
UAL-PA-03784-LA-1600041R1 entitled “Special Matters – Firm 737-800 Aircraft, as defined in Supplemental Agreement No. 10 to the Purchase Agreement and 737-800 Substitution Aircraft as defined in Supplemental Agreement No. 13
to the Purchase Agreement (individually and collectively 737-800 Special Matters Aircraft)”. 

1.16 Letter Agreement
UAL-PA-03784-LA-1600586 entitled “737-900ER *** Aircraft” is deleted in its
entirety due to expiration of Customer’s rights in 737-900ER *** Aircraft. 
 1.17 Letter
Agreement UAL-PA-03784-LA-1601963 entitled “Aircraft Performance Guarantees – Firm
737-800 Aircraft” is deleted in its entirety and replaced with
UAL-PA-03784-LA-1601963R1 entitled “Aircraft Performance Guarantees – Firm 737-800 Aircraft and 737-800 Substitution Aircraft” to reflect addition of 737-800 Substitution Aircraft to the Purchase
Agreement. 
 1.18 Letter Agreement UAL-LA-1604287 entitled
“Certain ***” is hereby incorporated by the Purchase Agreement. 
  

	2.	Miscellaneous. 

 2.1 If Boeing or Customer determines that an Exhibit, a Supplemental
Exhibit or a Letter Agreement should be further amended to incorporate Firm 737-800 Aircraft and/or 737-800 Substitution Aircraft, then Boeing and Customer will work
together for a mutually agreeable solution. 

  

					
	
UAL-PA-03784
	  	SA-13	  	Page 4
		  	BOEING / UNITED AIRLINES PROPRIETARY	  	

 Supplemental Agreement No. 13 to 

Purchase Agreement PA-03784 
  

 2.2 Boeing and Customer agree to apply the following amounts received by Boeing from Customer
as follows: 
 *** in the aggregate amount of *** from the expired rights in *** 737-700 ***
Aircraft; 
 *** in the aggregate amount of *** from the expired rights in *** 737-900ER ***
Aircraft; and 
 *** in the amount of *** from the *** former *** 737-700 Aircraft. 

The resulting aggregate amount of *** will be applied first toward the payment obligation of *** due at the effective date of this Supplemental Agreement
No. 13 for the *** 737-800 Substitution Aircraft. The remaining aggregate amount of *** of *** will be *** on the effective date of this Supplemental Agreement No. 13 exclusively to Customer purchase
agreement payment obligations as follows: 
  

																									
	 	  	 	 	  	Purchase
Agreement
No. 3784	 	  	Purchase
Agreement
No. 3776	 	  	Purchase
Agreement
No. 3860	 	  	Purchase
Agreement
No. 4308	 	  	TOTAL	 
	 Amount due for SA-7 to Purchase Agreement No. 3776: (61) 737-9 Aircraft
	  				  				  	$	***	 	  				  				  	$	***	 
							
	 Payment

Application Date
	  	Payment
Due Date	 	  	 	 	  	 	 	  	 	 	  	 	 	  	 	 
	 Effective date of SA 13 for 737NG
	  	 	***	 	  	$	***	 	  	$	***	 	  	$	***	 	  	$	***	 	  	$	***	 
	 Effective date SA 13 for 737NG
	  	 	***	 	  				  	$	***	 	  	$	***	 	  	$	***	 	  	$	***	 
	 Effective date SA 13 for 737NG
	  	 	***	 	  	$	***	 	  	$	***	 	  	$	***	 	  	$	***	 	  	$	***	 
	 Effective date SA 13 for 737NG
	  	 	***	 	  	$	***	 	  	$	***	 	  	$	***	 	  	$	***	 	  	$	***	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total
	  				  	$	***	 	  	$	***	 	  	$	***	 	  	$	***	 	  	$	***	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 The Purchase Agreement will be deemed to be supplemented to the extent provided herein as of the date hereof and as so
supplemented will continue in full force and effect. 

  

					
	 UAL-PA-03784
	  	SA-13	  	Page 5
		  	BOEING / UNITED AIRLINES PROPRIETARY	  	

 Supplemental Agreement No. 13 to 

Purchase Agreement PA-03784 
  

 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
	  		  	
                        Senior Vice
President Finance,

                     
     Procurement and Treasurer

	                            Title	  		  	                                Title

  

					
	
UAL-PA-03784
	  	SA-13	  	Page 6
		  	BOEING / UNITED AIRLINES 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	  	
	1A.	 	 Aircraft Information Table – 737-900ER
	  	SA-8
			
	1B.	 	 Aircraft Information Table – 2016 737-700
Aircraft (DELETED)
	  	Per §1.2 of SA-13
			
	1C.	 	 Aircraft Information Table –Firm 737-800
Aircraft
	  	SA-10
			
	1D.	 	 Aircraft Information Table –737-800
Substitution Aircraft
	  	SA-13
		
	EXHIBITS	  	
			
	 A.
	 	 Aircraft Configuration - 737-900ER
	  	
			
	A1.	 	 Aircraft Configuration – 2016 737-700 Aircraft
(DELETED)
	  	Per §1.4 of SA-13
			
	 A2.
	 	 Aircraft Configuration – Firm 737-800
Aircraft
	  	SA-10
			
	 B.
	 	 Aircraft Delivery Requirements and Responsibilities
	  	
		
	SUPPLEMENTAL EXHIBITS	  	
			
	 AE1.
	 	 Escalation Adjustment/Airframe and Optional Features
	  	SA-9
			
	 BFE1.
	 	 BFE Variables for 737-900ER Aircraft
	  	SA-1
			
	BFE2.	 	 BFE Variables for 2016 737-700 Aircraft Incorporated
by SA-9 (DELETED)
	  	Per §1.5 of SA-13
			
		 	 Attachment A1: BFE Variables for the ***
2016 737-700 Aircraft Incorporated by SA-11 (DELETED)
	  	Per §1.5 of SA-13
			
	 BFE3.
	 	 BFE Variables for Firm 737-800 Aircraft and 737-800 Substitution Aircraft
	  	SA-10
			
		 	 Attachment A1: BFE Variables for the 737-800
Substitution Aircraft
	  	SA-13
			
	 CS1.
	 	 Customer Support Variables
	  	
			
	 EE1.
	 	 Engine Escalation, Engine Warranty and ***
	  	
			
	 SLP1.
	 	 Service Life Policy Components
	  	

  

					
	 P.A. 03784
	  	TABLE OF CONTENTS, Page 1 of 4	  	SA-13
		  	BOEING / UNITED AIRLINES PROPRIETARY	  	

					
	 	 	 	 	 SA NUMBER

	 LETTER AGREEMENTS
	 		 	
	UAL-PA-03784-LA-1207868	 	 Performance Guarantees
	 	
	UAL-PA-03784-LA-1207870	 	 Spare Parts Initial Provisioning
	 	
	UAL-PA-03784-LA-1207871	 	 Special Matters
	 	
	UAL-PA-03784-LA-1207878	 	 Demonstration Flight Waiver
	 	
	UAL-PA-03784-LA-1207879R2	 	 *** Aircraft (DELETED)
	 	SA-9
			
	UAL-PA-03784-LA-1207879R4	 	 737-700 *** Aircraft (DELETED)
	 	Per §1.7 of SA-13
			
	UAL-PA-03784-LA-1207881	 	 Seller Purchased Equipment 737-900ER
	 	
		 	 Attachment AR1 to Letter Agreement UAL-PA-03784-LA-1207881
	 	SA-9
			
	UAL-PA-03784-LA-1208155R3

	 	 *** Matters 737-900ER, Firm 737-800 Aircraft AND 737-800 Substitution Aircraft
	 	SA-13
			
	UAL-PA-03784-LA-1208156R2
	 	 *** for the 737NG Aircraft
	 	SA-13

			
		 	 Attachment A: ***
	 	SA-13

			
		 	 Attachment B1: ***
	 	SA-13

			
		 	 Attachment B2: ***
	 	SA-13

			
	UAL-PA-03784-LA-1208172R1
	 	 ***
	 	SA-13
			
	UAL-PA-03784-LA-1208173R1	 	 ***
	 	SA-13
	UAL-PA-03784-LA-1208169	 	 737 Production Adjustments
	 	
	UAL-PA-03784-LA-1208938	 	 Privileged and Confidential Matters
	 	
			
	UAL-PA-03784-LA-1208939
	 	 Aircraft Model *** (DELETED)
	 	Per §1.9 of SA-13
			
	UAL-PA-03784-LA-1209115	 	 ***
	 	
	hUAL-PA-03784-LA-1300306	 	 Aircraft ***
	 	SA-2
	UAL-PA-03784-LA-1400240	 	 Aircraft ***
	 	SA-5

  

					
	
UAL-PA-03784
	  	SA-13	  	Page 3
		  	BOEING / UNITED AIRLINES PROPRIETARY	  	

 TABLE OF CONTENTS, Continued 

 

					
	UAL-PA-03784-LA-1504843	 	 Open Matters – 2016 737-700 Aircraft
(DELETED )
	 	Per §1.10 of SA-13
			
	UAL-PA-03784-LA-1504844	 	 Special Matters – 2016 737-700 Aircraft
(DELETED )
	 	Per §1.11 of SA-13
			
	UAL-PA-03784-LA-1600041R1	 	 Special Matters – Firm 737-800 Aircraft and 737-800 Substitution Aircraft (individually and collectively “737-800 Special Matters Aircraft”)
	 	SA-10
			
	UAL-PA-03784-LA-1600586	 	 737-900ER *** Aircraft (DELETED)
	 	Per §1.12 of SA-13
			
	UAL-PA-03784-LA-1600829	 	 *** for 2016 737-700 Aircraft
	 	SA-11
			
	UAL-PA-03784-LA-1601973R1	 	 Aircraft Performance Guarantees - Firm 737-800
Aircraft and 737-800 Substitution Aircraft
	 	SA-13
			
	UAL-LA-1604287	 	 Certain ***
	 	Dec. 2016 Letter Agreement No. 1

  

  

					
	P.A. 03784	 	TABLE OF CONTENTS, Page 3 of 4	  	SA-13
		 	BOEING / UNITED AIRLINES PROPRIETARY	  	

 TABLE OF CONTENTS, Continued 

 

			
	 SUPPLEMENTAL AGREEMENTS
	  	 DATED AS OF

	Supplemental Agreement No. 1	  	September 27, 2012
		
	Supplemental Agreement No. 2	  	March 1, 2013
		
	Supplemental Agreement No. 3	  	June 27, 2013
		
	Supplemental Agreement No. 4	  	September 11, 2013
		
	Supplemental Agreement No. 5	  	March 3, 2014
		
	Supplemental Agreement No. 6	  	June 6, 2014
		
	Supplemental Agreement No. 7	  	May 26, 2015
		
	Supplemental Agreement No. 8	  	June 12, 2015
		
	Supplemental Agreement No. 9	  	January 20, 2016
		
	Supplemental Agreement No. 10	  	February 8, 2016
		
	Supplemental Agreement No. 11	  	March 7, 2016
		
	Supplemental Agreement No. 12	  	June 24, 2016
		
	Supplemental Agreement No. 13	  	December 27, 2016
		
	 Dec. 2016 Letter Agreement No. 1

UAL-LA-1604287 entitled “Certain ***
	  	December 27, 2016

  

					
	P.A. 03784	  	TABLE OF CONTENTS, Page 4 of 4	  	SA-13
		  	BOEING / UNITED AIRLINES PROPRIETARY	  	

 Table 1D To 

Purchase Agreement No. PA-03784 

737-800 Substitution Aircraft Delivery, Description, Price and *** 

 

																													
	 Airframe Model/MTOW:
	  	737-800	  	 	*** pounds  #	 	 				  	 Detail Specification:
	 				 	 	***	 	 				 			
									
	 Engine Model/Thrust:
	  	CFM56-7B***	  	 	*** pounds	 	 				  	 Airframe Price Base Year/Escalation Formula:
	 				 				 	 	***	 	 	 	***	 
									
	 Airframe Price:
	  		  				 	      $	***	 	  	 Engine Price Base Year/Escalation Formula:
	 				 				 	 	***	 	 	 	***	 
									
	 Optional Features:
	  		  				 	      $	***	 	  	 Airframe Escalation Data: 
	 				 				 				 			
		  		  				 	  
	  
	 	  		 				 				 				 			
								
	 Sub-Total of Airframe and Features:
	  				 	      $	***	 	  	 Base Year Index (ECI):
	 	 	***	 	 				 				 			
								
	 Engine Price (Per Aircraft):
	  				 	      $	***	 	  	 Base Year Index (CPI):
	 	 	***	 	 				 				 			
		  		  				 	  
	  
	 	  		 				 				 				 			
								
	 Aircraft Basic Price (Excluding BFE/SPE):
	  				 	      $	***	 	  		 				 				 				 			
		  		  				 	  
	  
	 	  		 				 				 				 			
								
	 Buyer Furnished Equipment (BFE) Estimate:
	  				 	      $	***	 	  		 				 				 				 			
								
	 Seller Purchased Equipment (SPE) Estimate:
	  				 	      $	***	 	  		 				 				 				 			
								
	 Deposit per Aircraft:
	  				 	      $	***	* 	  		 				 				 				 			

  

																											
	Delivery
Date	  	Number of
Aircraft	  	Escalation
Factor
(Airframe)	 	  	
            
	 	  	
            
	 	  	Escalation Estimate
*** Base Price Per
A/P	 	  	
*** Per Aircraft (Amts. Due/*** Prior to Delivery):

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

	  ***  	  	***	  	 	***	 	  				  				  	 	$***	 	  	$***	  	$***	  	$***	  	$***
		  	  
	  				  				  				  				  		  		  		  	
	Total:	  	4	  				  				  				  				  		  		  		  	

  

	*	- Immediately prior to effective date of SA-13, *** had been received from Customer by Boeing. See §2 of SA-13 

	#	- Purchased MTOW is *** pounds. Aircraft are eligible for the provisions of Letter Agreement
6-1162-MMF-311R8 entitled 

  

	  	 “Provisions Relating to Buyer’s *** for Model 737 Aircraft” 

  

					
	UAL-PA-03784 83313-1F.TXT	 	BOEING / UNITED AIRLINES PROPRIETARY	 	SA-13
		 		 	Page 1

 Attachment A2 to Supplemental Exhibit BFE3 to Purchase Agreement Number PA 03784 

Preliminary BFE On-Dock Dates for the 737-800 Substitution
Aircraft 
  

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

	 ***
	 	***	 	***	 	***	 	***	 	***	 	***	 	***	 	***	 	***	 	***	 	***
		 	  
	 		 		 		 		 		 		 		 		 		 	
	 Total
	 	4	 	

 The above dates apply solely if Customer selects a BFE component specified above; e.g., if BFE avionics are not selected by
Customer, then the dates specified above in the “Avionics” column do not apply. 

  

					
	Attachment A2 to UAL-PA-03784-BFE3	  	SA-13	  	Attachment A2, Page 1
		  	BOEING / UNITED AIRLINES PROPRIETARY	  	

					
	 

	  		  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 	  	 

  

 UAL-PA-03784-LA-1208155R3 
 United Airlines, Inc. 

233 South Wacker Drive 
 Chicago, IL 60606 

 

	Subject:	*** Matters: 737-900ER, Firm 737-800 Aircraft and 737-800 Substitution Aircraft 

 

	Reference:	Purchase Agreement No. PA-03784 (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc. (Customer) relating to Model 737NG 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-03784-LA-1208155R2. 
 The Purchase Agreement
incorporates the terms and conditions of AGTA-UAL between Boeing and Customer. This Letter Agreement modifies certain terms and conditions of the AGTA with respect to the Aircraft. 

 

	1.               ***.	

 1.1     ***. 

  

					
	
UAL-PA-03784-LA-1208155R3
	 		  	SA-13
	*** Matters: 737-900ER, Firm 737-800 Aircraft	  	
	        and 737-800 Substitution Aircraft	  	Page 1
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	

  

					
	 1.2       ***
	  		  	
			
	                ***	  		  	***
	                ***	  		  	          ***%
		  	Total	  	          ***%

 1.3    [Reserved] 

1.4    ***. 

1.4.1 With respect to (i) each aircraft in Table 1A as of the effective date of the Purchase Agreement (ii) each aircraft in Table 1C
as of the effective date of the Purchase Agreement, and (iii) each aircraft in Table 1D as of the effective date of the Purchase Agreement, *** agrees *** on *** pursuant to Article 1.1 of this Letter Agreement ***. The *** will be the *** on
*** will be *** will ***. 
 1.4.2 *** the *** for each Aircraft covered by Table 1A, Table 1C or Table 1D, will be ***. 

1.4.3 *** for each 737-*** Aircraft (resulting from Customer’s *** aircraft under Supplemental
Agreement No. 8 to the Purchase Agreement) scheduled to deliver in 2016 *** to the scheduled delivery date for such Aircraft. 

  

					
	
UAL-PA-03784-LA-1208155R3
	 		  	SA-13
	*** Matters: 737-900ER, Firm 737-800 Aircraft	  	
	        and 737-800 Substitution Aircraft	  	Page 2
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	

  

 1.5 Delivery *** Impact on *** Calculations. If the delivery of any Aircraft covered
by Table 1A, Table 1C or Table 1D is *** due to ***, then interest on the *** in respect of each such Aircraft will not *** during the time period from ***. Payment of *** that has *** prior to the start of the *** but remains unpaid will be paid on
the normal quarterly *** payment schedule set forth in Article 2 of this Letter Agreement or on the delivery date of such *** Aircraft, whichever comes first. 
  

	2.	Boeing Invoice for ***. 

 Boeing shall submit to Customer, not less than *** days prior
to the end of each quarter, an invoice for *** during each such quarter. Customer’s payment is due and payable to Boeing on the first business day of the following month. Boeing’s invoice will show *** during the quarter for each Aircraft
covered by Table 1A, Table 1C, or Table 1D for which *** have been ***. The invoice will also include *** on *** with respect to other aircraft in other purchase agreements between Customer and Boeing. 

 

	3.	*** Rights. 

 3.1     ***. 

3.2 In the event Boeing seeks to *** the Purchase Agreement as amended by this Letter Agreement. Customer will ***. 

  

					
	
UAL-PA-03784-LA-1208155R3
	 		  	SA-13
	*** Matters: 737-900ER, Firm 737-800 Aircraft	  	
	 and 737-800 Substitution Aircraft
	  	Page 3
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	

  

 3.3 For all purposes of this Article 3 including without limitation, notice, *** or any other
application, the term “Boeing” means and includes The Boeing Company, its divisions, subsidiaries, affiliates and the assignees of each. Nothing herein shall constitute an election or waiver of any remedy of Boeing; all such remedies shall
be cumulative. Boeing expressly reserves all of its rights and remedies under any agreement and applicable law. 
 3.4 Notwithstanding
Article 3.1, Boeing shall not *** under the Purchase Agreement with respect to any Aircraft that is subject to ***. 
  

	4.	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-03784-LA-1208938. 
  

	5.	Assignment. 

 Notwithstanding any other provisions of the Purchase Agreement, 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. 

If the foregoing correctly sets forth your understanding of our agreement with respect to the matters treated above, please indicate your
acceptance and approval below. 
  

			
	Very truly yours,
	
	THE BOEING COMPANY
		
	By:	 	 /s/ Irma L. Krueger

		
	Its:	 	
Attorney-in-Fact

  

					
	
UAL-PA-03784-LA-1208155R3
	 		  	SA-13
	*** Matters: 737-900ER, Firm 737-800 Aircraft	  	
	 and 737-800 Substitution Aircraft
	  	Page 4
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	

  

			
	ACCEPTED AND AGREED TO this
		
	 Date:
	 	 December 27, 2016

	
	UNITED AIRLINES, INC.
		
	 By:
	 	 /s/ Gerald Laderman

		
	 Its:
	 	 Senior Vice President Finance, Procurement and Treasurer

  

					
	
UAL-PA-03784-LA-1208155R3
	 		  	SA-13
	***: 737-900ER, Firm 737-800 Aircraft	  	
	 and 737-800 Substitution Aircraft
	  	Page 5
	BOEING / UNITED AIRLINES PROPRIETARY	  	

					
	 

	  		  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 	  	 

  

 UAL-PA-03784-LA-1208156R2 
 United Airlines, Inc. 

233 South Wacker Drive 
 Chicago, Illinois 60606 

 

	Subject:	*** for the 737NG Aircraft 

  

	Reference:	Purchase Agreement No. 03784 (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc. (Customer) relating to 737NG aircraft

 This letter agreement UAL-PA-03784-LA-1208156R2 (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 UAL-PA-03784-LA-1208156R1.

  

	1.	Definitions. 

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

 

	2.	Applicability. 

 Notwithstanding any other provision of the Purchase Agreement to the
contrary, the parties agree that the *** for the Airframe Price and Optional 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. 

  

					
	
UAL-PA-03784-LA-1208156R2
	 		  	SA-9
	*** for the 737NG Aircraft	  	Page 1
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	

  

	4.	***. 

 4.1 If the *** forecast, as set forth in Article 3 above, ***, as set forth in
Attachments B1 and B2 as applicable (collectively Attachment B), *** any Program Aircraft that is *** to such *** forecast, as set forth in Attachment A, then Boeing shall issue an *** Notice to the Customer by the date set forth in
Attachment A. Such *** Notice shall, ***, either: 
 4.1.1 *** for such affected Program Aircraft *** as set forth in Attachment B; or 

4.1.2 provide Customer with the *** as set forth in Attachment B and ***; or 

4.1.3 provide Customer with the *** as set forth in Attachment B, with Boeing and Customer *** as set forth in Attachment B ***. 

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 *** days of its receipt of the *** Notice from Boeing. In the event Customer *** in accordance with Article 4.1.4 above, then Boeing
*** to Customer, *** for the *** Program Aircraft. 
 4.2.1 Within *** days of Boeing’s receipt of *** notice for any such *** Program
Aircraft under Article 4.2 above, Boeing *** written notice to Customer to *** related to such *** Program Aircraft ***, by Customer. 

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

  

					
	
UAL-PA-03784-LA-1208156R2
	 		  	SA-13
	*** for the 737NG Aircraft	  	Page 2
	BOEING / UNITED AIRLINES PROPRIETARY	  	

 

 
 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.	*** 

 5.1 If the *** forecast, as set forth in Article 3, *** any Program Aircraft *** as
set forth in Attachment B and *** as set forth in Attachment B, *** for such Program Aircraft *** as set forth in Attachment B *** as set forth in Attachment B ***. 

5.2 In the event the *** at *** of a Program Aircraft subject to Article 5.1 above, *** applicable to such Program Aircraft will be determined
pursuant to Article 6 below. 
  

	6.	***. 

 If the *** forecast, as set forth in Article 3, above, ***, as set forth in
Attachment B, *** any Program Aircraft *** such *** forecast, as set forth in Attachment A, then such cumulative annual escalation applicable to such Program Aircraft ***: 

6.1 If the *** of a Program Aircraft, *** as set forth in Attachment B for such Program Aircraft, then the *** for such Program Aircraft. 

6.2 *** of a Program Aircraft, *** factor as set forth in Attachment B for such Program Aircraft ***, as set forth in Attachment B, then the
*** for such Program Aircraft *** as set forth in Attachment B. 

  

					
	UAL-PA-03784-LA-1208156R2	 		  	SA-13
	*** for the 737NG Aircraft	 		  	Page 3
		 	BOEING / UNITED AIRLINES PROPRIETARY	  	

 

 
  

	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 *** established in this Letter Agreement for such Program Aircraft *** provisions of the Purchase Agreement ***. 

 

	8.	Assignment. 

 Except for an assignment by Customer to a
wholly-owned subsidiary as permitted under Article 9, entitled “Assignment, Resale, or Lease” of the AGTA, this Letter Agreement is provided as an accommodation to Customer in consideration of
Customer 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-03784-LA-1208938. 
  

			
	THE BOEING COMPANY
		
	By:	 	 /s/ Irma L. Krueger

		
	Its:	 	
Attorney-in-Fact

  

					
	UAL-PA-03784-LA-1208156R2	 		  	SA-13
	*** for the 737NG Aircraft	 		  	Page 4
		 	BOEING / UNITED AIRLINES PROPRIETARY	  	

 

 
  

					
	ACCEPTED AND AGREED TO this
			
	Date:	  	 December 27, 2016
	  	

  

					
	UNITED AIRLINES, INC.
			
	By:	  	 /s/ Gerald Laderman
	  	
			
	Its:	  	Senior Vice President Finance,	  	
		  	 Procurement and Treasurer
	  	

  

					
	
UAL-PA-03784-LA-1208156R2
	 		  	SA-13
	 *** for the 737NG Aircraft
	 		  	Page 5
		 	BOEING / UNITED AIRLINES PROPRIETARY	  	

 ATTACHMENT A 

*** Forecast & *** Notice Date 
  

					
	 ***

Forecast
	 	 Applicable to Program Aircraft

Delivering in Time Period
	 	 *** Notice

Date

	 ***
	 	 ***
	 	 ***

  

					
	 Attachment A to UAL-PA-03784-LA-1208156R2
	  	SA-13
	 *** for the 737NG Aircraft
	  		  	Att. A, Page 1
		  	BOEING / UNITED AIRLINES PROPRIETARY	  	

 ATTACHMENT B1 

*** Factors – *** Aircraft 
  

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

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

  

					
	 Attachment B1 to UAL-PA-03784-LA-1208156R2
	  	SA-13
	 *** for the 737NG Aircraft
	  	Att. B1, Page 1
		  	BOEING / UNITED AIRLINES PROPRIETARY	  	

 ATTACHMENT B2 

*** Factors – *** Aircraft 
  

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

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

  

  
  

					
	 Attachment B2 to UAL-PA-03784-LA-1208156R2
	  	SA-13
	 *** for the 737NG Aircraft
	  	Att. B2, Page 1
		  	BOEING / UNITED AIRLINES PROPRIETARY	  	

					
	 

	  		  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 	  	 

  

 UAL-PA-03784-LA-1208172R1 
 United Airlines, Inc. 

233 South Wacker Drive 
 Chicago, Illinois 60606 

 

	Subject:	*** 

  

	Reference:	Purchase Agreement No. 3784 (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc. (Customer) relating to 737NG aircraft 

This Letter Agreement amends and supplements the Purchase Agreement. All terms used herein and in the Agreement, and not defined herein, will
have the same meaning as in the Agreement. 
 Subject to the terms, provisions, and conditions described herein, Boeing *** to Customer ***
Aircraft, as of the effective date (Effective Date) of the ***. 
  

	1.	Customer’s ***. 

 Boeing *** Customer, at a charge as described in paragraph 3
below, *** an Aircraft *** for the respective model type. The Effective Date of such *** shall be the date that Boeing provides ***, unless otherwise mutually agreed to. *** for the applicable Aircraft is ***. Boeing will use its best reasonable
efforts to provide *** not later than *** after receipt of Customer’s written request. 
  

	2.	***. 

 At the time of delivery of each Aircraft, or *** after delivery of an Aircraft,
*** as requested by Customer. Such *** shall be ***, identifying the Aircraft Manufacturer’s Serial Number (MSN), the delivery date and the Effective Date of ***. The *** shall also indicate ***; the ***; and the ***. Customer may***
subsequent to the Effective Date. If ***, then Customer *** as outlined in paragraph 3 below. 

  

					
	
UAL-PA-03784-LA-1208172R1
	 		  	SA-13
	***	  	Page 1
	 BOEING/UNITED AIRLINES, INC.
PROPRIETARY

 

 
  

	3.	***. 

 *** in accordance with either the *** set forth below, at Customer’s option.

  

	 	3.1	***. 

 If Customer elects to ***, then Customer shall *** 

 

	 	3.2	***. 

 *** 
  

	 	3.3	***. 

 *** 
  

	 	3.4	Customer’s ***. 

 If Customer *** shall be calculated as follows: 

*** 
  

	 	3.5	*** 

 *** 
  

	4.	*** 

 *** 

  

					
	
UAL-PA-03784-LA-1208172R1
	  		  	SA-13
	 ***
	  	Page 2
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

 

 
  

	5.	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-03784-LA-1208938. 
 Very truly yours, 

 

			
	THE BOEING COMPANY
		
	By	 	 /s/ Irma L. Krueger

		
	Its	 	
Attorney-in-Fact

	
	ACCEPTED AND AGREED TO this
		
	Date:	 	 December 27, 2016

	
	UNITED AIRLINES, INC.
		
	By:	 	 /s/ Gerald Laderman

		
	Its:	 	Senior Vice President Finance,
		 	     Procurement and Treasurer

  

					
	
UAL-PA-03784-LA-1208172R1
	  		  	SA-13
	 ***
	  		  	Page 3
	BOEING / UNITED AIRLINES, INC. PROPRIETARY

 Attachment A to Letter Agreement UAL-PA-03784-LA-1208172R1 

Date:                         
                         
 United
Airlines, Inc. 
 233 South Wacker Drive 
 Chicago, Illinois
60606 
  

			
	 Attention:
	  	 ***

		
	 Reference:
	  	 Letter Agreement UAL-PA-03784-LA-1208172R1 to Purchase

		  	 Agreement 03784

 *** 
 Very truly yours, 

THE BOEING COMPANY 
 By:
                                        
     
 Its:
                                        
      

  

					
	
Attachment A to UAL-PA-03784-LA-1208172R1
	 		  	SA-13
	***	  	Page 8
	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

 Attachment B to Letter Agreement UAL-PA-03784-LA-1208172R1 
 *** 

 

  

					
	
Attachment B to UAL-PA-03784-LA-1208172R1
	 		  	SA-13
	***	  	Page 1
	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	 The Boeing Company     

P.O. Box 3707                

Seattle, WA 98124-2207

	 	  	 

  

 UAL-PA-03784-LA-1208173R1 
 United Airlines, Inc. 

233 South Wacker Drive 
 Chicago, Illinois 60606 

 

	Subject:      	*** 

  

	Reference:	  Purchase Agreement No. 3784 (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc. (Customer) relating to 737NG 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.	Special Consideration for *** 

 In the event that Customer elects to have the ***
installed on an Aircraft at time of delivery, Boeing shall provide at the time of delivery of each such Aircraft ***. 
 In the event that
Customer elects to install the *** as a post delivery modification, Boeing shall *** such *** in a manner similar to what is currently being done with ***, i.e. *** will be ***. 

 

	2.	Assignment ***. 

 The *** described in this Letter Agreement are ***. This Letter
Agreement cannot be assigned, in whole or in part, without the prior written consent of Boeing. 
  

	3.	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-03784-LA-1208938. 

  

					
	
UAL-PA-03784-LA-1208173R1
	 		  	SA-13
	***	  	Page 1
	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

 

 
  

			
	 Very truly yours,

	
	THE BOEING COMPANY
		
	By:	 	 /s/ Irma L. Krueger

		
	Its:	 	
Attorney-in-Fact

	
	ACCEPTED AND AGREED TO this
		
	Date:	 	 December 27, 2016

 UNITED AIRLINES, INC. 
  

			
	By:	 	 /s/ Gerald Laderman

		
	Its:	 	Senior Vice President Finance,
		 	       Procurement and Treasurer

  

					
	
UAL-PA-03784-LA-1208173R1
	 		  	SA-13
	***	  	Page 2
	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

			
	

	  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 

  

 UAL-PA-03784-LA-1600041R1 
 United Airlines, Inc. 

233 South Wacker Drive 
 Chicago, Illinois 60606 

 

	Subject:	    Special Matters – Firm 737-800 Aircraft, as defined in Supplemental Agreement No. 10 to the Purchase Agreement and
737-800 Substitution Aircraft as defined in Supplemental Agreement No. 13 to the Purchase Agreement (individually and collectively 737-800 Special Matters
Aircraft) 

  

	Reference:	    Purchase Agreement No. 3784 (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc. (Customer) relating to 737NG aircraft 

Ladies and Gentlemen: 
 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.	***. 

  

	 	1.1.	Firm 737-800 Aircraft ***. 

 In consideration of
Customer’s purchase of 737-800 Special Matters Aircraft, Boeing *** at the time of delivery of each 737-800 Special Matters Aircraft *** (737-800 Special Matters ***). The 737-800 Special Matters *** amount is subject to the *** as *** the *** at time of delivery. Such 737-800 Special Matters *** may be used
by *** for the *** of Boeing *** or *** to *** at the time of delivery of the applicable Aircraft. The 737-800 Special Matters *** may not,***however, be used for the ***. 

  

					
	
UAL-PA-03784-LA-1600041
	 		  	Page 1
	Special Matters – 737-800 Special Matters Aircraft	  	P.A. No. 3784, SA 13
	BOEING / UNITED AIRLINES PROPRIETARY	  	

 

 
  

	 	1.2.	***. 

 In consideration of Customer’s purchase of
737-800 Special Matters Aircraft, Boeing shall *** at the time of delivery of each 737-800 Special Matters Aircraft a ***. The *** amount is *** the *** at time of
delivery. Such *** may be used by *** for the *** of Boeing *** or *** to *** at the time of delivery of the applicable Aircraft. The *** may not, however, be used for the ***. 

***. 
  

	 	1.3.	***. 

 In consideration of Customer configuring and taking delivery of 737-800 Special Matters Aircraft with ***, Boeing will *** to Customer a *** at delivery of each 737-800 Special Matters Aircraft in the *** of the respective 737-800 Special Matters Aircraft delivery pursuant to the *** set forth in Supplemental Exhibit AE1 to the Purchase Agreement. Such *** may be used by Customer for the *** of Boeing *** at the time of delivery of
the applicable Aircraft. ***. 
  

	 	1.4.	Applicability of ***. 

 The *** described in this Letter Agreement will only apply to the
737-800 Special Matters Aircraft. 
  

	2.	Assignment of ***. 

 Customer may not assign the *** described in this Letter Agreement
without Boeing’s prior written consent ***. 

  

					
	
UAL-PA-03784-LA-1600041
	 		  	Page 2
	Special Matters – 737-800 Special Matters Aircraft	  	P.A. No. 3784, SA 13
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	
		  	

  

	3.	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-03784-LA-1208938. 
  

			
	Very truly yours,
	
	THE BOEING COMPANY
		
	By:	 	 /s/ Irma L. Krueger

		
	Its:	 	
Attorney-in-Fact

  

					
	
UAL-PA-03784-LA-1600041
	 		  	Page 3
	Special Matters – 737-800 Special Matters Aircraft	  	P.A. No. 3784, SA 13
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	

	  	
		  	

  

					
	ACCEPTED AND AGREED TO this
		
	Date:	 	 December 27, 2016

	
	UNITED AIRLINES, INC.
		
	By:	 	 /s/ Gerald Laderman

		
	Its:	 	Senior Vice President Finance,
		 	         Procurement and Treasurer

  

					
	
UAL-PA-03784-LA-1600041
	 		  	Page 4
	Special Matters – 737-800 Special Matters Aircraft	  	P.A. No. 3784, SA 13
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 

  

 UAL-PA-03784-LA-1601973R1 
 United Airlines, Inc. 

233 South Wacker Drive 
 Chicago, Illinois 60606 

 

	Subject:	        Aircraft Performance Guarantees – Firm 737-800 Aircraft and 737-800 Substitution
Aircraft 

  

	Reference:    Purchase	Agreement No. PA-03784 (Purchase Agreement) between The Boeing Company (Boeing) and 

	                      United Airlines,	Inc. (Customer) relating to 737NG (Aircraft) 

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

Boeing agrees to provide Customer with the performance guarantees in the Attachment for the Firm
737-800 Aircraft and 737-800 Substitution Aircraft. These guarantees are exclusive and expire upon delivery of the Aircraft to Customer. 

 

	1.	Assignment. 

 Notwithstanding any other provisions of the Purchase Agreement, the rights
and obligations described in this Letter Agreement are provided to Customer in consideration of Customer becoming the operator of the Aircraft and cannot be assigned in whole or, in part. 

 

	2.	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-03784-LA-1208938. 

  

					
	
UAL-PA-03784-LA-1601973R1
	 		  	SA-13
	 Aircraft Performance Guarantees – Firm 737-800 Aircraft

and 737-800 Substitution Aircraft
	  	Page 1
	BOEING PROPRIETARY	  	

			
	 

	  	

  

			
	 Very truly yours,

	
	 THE BOEING COMPANY

		
	By:	 	 /s/ Irma L. Krueger

		
	Its:	 	
Attorney-In-Fact

	
	 ACCEPTED AND AGREED TO this

		
	Date:	 	 December 27, 2016

	
	UNITED AIRLINES, INC.
		
	By	 	 /s/ Gerald Laderman

		
	Its	 	 Senior Vice President Finance,

Procurement and Treasuer

  

					
	
UAL-PA-03784-LA-1601973R1
	 		  	SA-13
	 Aircraft Performance Guarantees – Firm 737-800 Aircraft

and 737-800 Substitution Aircraft
	  	Page 2
	BOEING PROPRIETARY	  	

 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
1 
  

 MODEL 737-800 WITH WINGLETS PERFORMANCE GUARANTEES

 FOR UNITED AIRLINES, INC. 
  

			
	SECTION	  	CONTENTS
		
	1	  	AIRCRAFT MODEL APPLICABILITY
		
	2	  	FLIGHT PERFORMANCE
		
	3	  	AIRCRAFT CONFIGURATION
		
	4	  	GUARANTEE CONDITIONS
		
	5	  	GUARANTEE COMPLIANCE
		
	6	  	EXCLUSIVE GUARANTEES

  
  

			
	
UAL-PA-03784-LA-1601973R1

 Aircraft Performance Guarantees – Firm 737-800
Aircraft
         and 737-800
Substitution Aircraft
	  	 SA-13

 
 Page 1

	BOEING PROPRIETARY

 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
2 
  

	1	AIRCRAFT MODEL APPLICABILITY 

 The guarantees contained in this Attachment (the
“Performance Guarantees”) are applicable to the 737-800 Aircraft with winglets and short field performance enhancement option 0222C472A09 and a maximum takeoff weight of *** pounds, a maximum landing
weight of *** pounds, and a maximum zero fuel weight of *** pounds, and equipped with Boeing furnished CFM56-7B*** engines. 
  

	2	FLIGHT PERFORMANCE 

  

	2.1	Mission 

  

	2.1.1	Mission Payload 

 The payload for a stage length of *** nautical miles in still air
(equivalent to a distance of *** nautical miles with a *** knot headwind, representative of a *** route) using the conditions and operating rules defined below, shall not be less than the following guarantee value: 

 

	 	NOMINAL:	*** Pounds 

	 	TOLERANCE:	*** Pounds 

	 	GUARANTEE:	*** Pounds 

 Conditions and operating rules: 

 

			
	 Stage
 Length:
	 	 The stage length is defined as the sum of the distances for climb, cruise, and descent.

  

	 	Takeoff:	The airport altitude is *** feet. 

 The airport temperature is ***°C. 

The runway length is *** feet. 

The runway slope is *** percent uphill. 

  
  

			
	 Attachment to
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 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
3 
  

 The following obstacle definition is based on a straight out departure where obstacle height
and distance are specified with reference to the liftoff end of the runway: 
  

									
		 		  	Distance	  	Height	  	
		 	1.	  	*** feet	  	*** feet	  	
		 	2.	  	*** feet	  	*** feet	  	
		 	3.	  	*** feet	  	*** feet	  	

 Takeoff performance is based on an alternate forward center of gravity limit of *** percent of the mean
aerodynamic chord. 
 Maximum takeoff thrust is used for the takeoff. 

The takeoff gross weight shall conform to FAA Regulations. 

 

			
	 Climbout

Maneuver:
	 	 Following the takeoff to *** feet, the Aircraft accelerates to the recommended speed of *** KCAS while climbing to ***
feet above the departure airport altitude and retracting flaps and landing gear.

  

	 	Climb:	The Aircraft climbs from *** feet above the departure airport altitude to *** feet altitude at the recommended speed of *** KCAS. 

The Aircraft then accelerates at a rate of climb of *** feet per minute to the recommended climb speed for minimum block fuel. 

The climb continues at the recommended climb speed for minimum block fuel until *** Mach number is reached. 

The climb continues at *** Mach number to the initial cruise altitude. 

The temperature is ISA***°C during climb. 

  
  

			
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CFM56-7B*** Engines 
 Page
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 Maximum climb thrust is used during climb. 

 

	 	Cruise:	The Aircraft cruises at *** Mach number. 

 The initial cruise altitude is *** feet. 

A step climb or multiple step climbs of *** feet altitude may be used when beneficial to minimize fuel burn. 

The temperature is ISA***°C during cruise. 

The cruise thrust is not to exceed maximum cruise thrust except during a step climb when maximum climb thrust may be used. 

 

	 	Descent:	        The Aircraft descends from the final cruise altitude at *** Mach number until *** KCAS is reached. 

The descent continues at *** KCAS to an altitude of *** feet above the destination airport altitude. 

Throughout the descent, the cabin pressure will be controlled to a maximum rate of descent equivalent to *** feet per minute ***. 

The temperature is ISA***°C during descent. 
  

			
	 Approach and Landing Maneuver:
	 	 The Aircraft decelerates to the final approach speed while extending landing gear and flaps, then descends and
lands.

 The destination airport altitude is *** feet. 

 

			
	 Fixed Allowances:
	 	 For the purpose of this guarantee and for the purpose of establishing compliance with this guarantee, the following
shall be used as fixed quantities and allowances:

  
  

			
	 Attachment to
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CFM56-7B*** Engines 
 Page
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 Taxi-Out: 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Takeoff and Climbout Maneuver: 

 

	 	Fuel	*** Pounds 

	 	Distance	*** Miles 

	 	Time	*** Minutes 

 Approach and Landing Maneuver: 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Taxi-In (shall be consumed from the
reserve fuel): 
  

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Usable reserve fuel remaining upon completion of the approach and landing
maneuver: *** Pounds 
 For information purposes, the reserve fuel is either the greater of a minimum *** pounds, or is based on a standard
day temperature and a) a contingency fuel allowance equivalent to a continued cruise at the LRC Mach number at final cruise altitude and weight for a time equal to *** percent of the mission time from takeoff through the completion of the approach
and landing maneuver at the destination airport, b) a missed approach and flight to a *** nautical mile alternate, c) an approach and landing maneuver at the alternate airport, and d) a *** minute hold at *** feet above the alternate airport with an
altitude of *** feet. 
  

	2.1.2	Mission Payload 

 The payload for a stage length of *** nautical miles in still air
(equivalent to a distance of *** nautical miles with a *** knot headwind, representative of a *** route) using 

  
  

			
	 Attachment to
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 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
6 
  

 the conditions and operating rules defined below, shall not be less than the following
guarantee value: 
  

	 	NOMINAL:	*** Pounds 

	 	TOLERANCE:	*** Pounds 

	 	GUARANTEE:	*** Pounds 

 Conditions and operating rules: 

 

			
	Stage	  	 The stage length is defined as the sum of the distances for climb, cruise, and
descent.

	 Length:
	  	
		
	 Takeoff:
	  	 The airport altitude is *** feet.

 The airport temperature is ***°C. 

The runway length is *** feet. 

The stopway is *** feet. 
 The
following obstacle definition is based on a straight out departure where obstacle height and distance are specified with reference to the liftoff end of the runway: 
  

											
		 		  	Distance	  		  	Height	  	
		 	1.	  	*** feet	  		  	*** feet	  	
		 	2.	  	*** feet	  		  	*** feet	  	
		 	3.	  	*** feet	  		  	*** feet	  	
		 	4.	  	*** feet	  		  	*** feet	  	

 Takeoff performance is based on an alternate forward center of gravity limit of *** percent of the mean
aerodynamic chord. Maximum takeoff thrust is used for the takeoff. 
 The takeoff gross weight shall conform to FAA Regulations. 

  
  

			
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CFM56-7B*** Engines 
 Page
7 
  

 
			
	Climbout Maneuver:	 	 Following the takeoff to *** feet, the Aircraft accelerates to the recommended speed of *** KCAS while climbing to ***
feet above the departure airport altitude and retracting flaps and landing gear.

  

	 	Climb:	The Aircraft climbs from *** feet above the departure airport altitude to *** feet altitude at the recommended speed of *** KCAS. 

The Aircraft then accelerates at a rate of climb of *** feet per minute to the recommended climb speed for minimum block fuel. 

The climb continues at the recommended climb speed for minimum block fuel until *** Mach number is reached. 

The climb continues at *** Mach number to the initial cruise altitude. 

The temperature is ISA***°C during climb. 

Maximum climb thrust is used during climb. 
  

	 	Cruise:	The Aircraft cruises at *** Mach number. 

 The initial cruise altitude is *** feet. 

A step climb or multiple step climbs of *** feet altitude may be used when beneficial to minimize fuel burn. 

The temperature is ISA***°C during cruise. 

The cruise thrust is not to exceed maximum cruise thrust except during a step climb when maximum climb thrust may be used. 

 

	 	Descent:	The Aircraft descends from the final cruise altitude at *** KCAS to an altitude of *** feet above the destination airport altitude. 

  

			
	 Attachment to UAL-PA-03784-LA-1601973R1
	  	SA-13
	Aircraft Performance Guarantees – Firm 737-800 Aircraft	  	
	 and 737-800 Substitution Aircraft
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	BOEING PROPRIETARY

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CFM56-7B*** Engines 
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 Throughout the descent, the cabin pressure will be controlled to a maximum rate of descent
equivalent to *** feet per minute ***. 
 The temperature is ISA***°C during descent. 

 

			
	Approach and Landing Maneuver:	 	 The Aircraft decelerates to the final approach speed while extending landing gear and flaps, then descends and
lands.

 The destination airport altitude is *** feet. 

  

					
	 Attachment to UAL-PA-03784-LA-1601973R1
	 		  	SA-13
	Aircraft Performance Guarantees – Firm 737-800 Aircraft	  	
	 and 737-800 Substitution Aircraft
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	AERO-B-BBA4-M15-0858	  	SS15-0360
	BOEING PROPRIETARY	  	

 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
9 
  

 
			
	 Fixed
 Allowances:
	 	 For the purpose of this guarantee and for the purpose of establishing compliance with this guarantee, the following
shall be used as fixed quantities and allowances:

 Taxi-Out: 
  

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Takeoff and Climbout Maneuver: 

 

	 	Fuel	***Pounds 

	 	Distance	***Miles 

	 	Time	***Minutes 

 Approach and Landing Maneuver: 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Taxi-In (shall be consumed from the reserve fuel): 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Usable reserve fuel remaining upon completion of the approach and landing
maneuver: *** Pounds 
 For information purposes, the reserve fuel is based on a standard day temperature and a) a contingency fuel
allowance equivalent to *** minutes of continued cruise starting at the end of the mission cruise and at the LRC Mach number, b) a missed approach and flight to a *** nautical mile alternate, c) an approach and landing maneuver at the alternate
airport, and d) a *** minute hold at *** feet above the destination airport. 

  
  

			
	 Attachment to
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 Attachment to Letter Agreement 

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CFM56-7B*** Engines 
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	2.1.3	Mission Payload 

 The payload for a stage length of *** nautical miles in still air
(equivalent to a distance of *** nautical miles with a *** knot headwind, representative of a *** route) using the conditions and operating rules defined below, shall not be less than the following guarantee value: 

 

	 	NOMINAL:	*** Pounds 

	 	TOLERANCE:	*** Pounds 

	 	GUARANTEE:	*** Pounds 

 Conditions and operating rules: 

 

			
	Stage	  	         The stage length is defined as the sum of the
distances for climb, cruise, and descent.

	 Length:
	  	
		
	 Takeoff:
	  	         The airport altitude is *** feet.

 The airport temperature is ***°C. The runway length is *** feet. 

The runway slope is *** percent downhill. 

Takeoff performance is based on an alternate forward center of gravity limit of *** percent of the mean aerodynamic chord. 

Maximum takeoff thrust is used for the takeoff. The takeoff gross weight shall conform to FAA Regulations. 

 

			
	 Climbout
	  	         Following the takeoff to *** feet, the Aircraft
accelerates to the recommended speed of ***

	 Maneuver:
	  	        KCAS while climbing to *** feet above the departure airport altitude and retracting flaps and .
		  	        landing gear

  
  

			
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CFM56-7B*** Engines 
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	 	Climb:	The Aircraft climbs from *** feet above the departure airport altitude to *** feet altitude at the recommended speed of *** KCAS. 

The Aircraft then accelerates at a rate of climb of *** feet per minute to the recommended climb speed for minimum block fuel. 

The climb continues at the recommended climb speed for minimum block fuel until *** Mach number is reached. 

The climb continues at *** Mach number to the initial cruise altitude. 

The temperature is ISA***°C during climb. 

Maximum climb thrust is used during climb. 
  

	 	Cruise:	The Aircraft cruises at *** Mach number. 

 The initial cruise altitude is *** feet. 

A step climb or multiple step climbs of *** feet altitude may be used when beneficial to minimize fuel burn. 

The temperature is ISA***°C during cruise. 

The cruise thrust is not to exceed maximum cruise thrust except during a step climb when maximum climb thrust may be used. 

 

	 	Descent:	The Aircraft descends from the final cruise altitude at *** KCAS to an altitude of *** feet above the destination airport altitude. 

Throughout the descent, the cabin pressure will be controlled to a maximum rate of descent equivalent to *** feet per minute ***. 

The temperature is ISA***°C during descent. 

  
  

			
	 Attachment to
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Aircraft Performance Guarantees – Firm 737-800 Aircraft and 737-800 Substitution Aircraft

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CFM56-7B*** Engines 
 Page
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	Approach and Landing Maneuver:	 	 The Aircraft decelerates to the final approach speed while extending landing gear and flaps, then descends and
lands.

 The destination airport altitude is *** feet. 

 

			
	 Fixed
 Allowances:
	 	 For the purpose of this guarantee and for the purpose of establishing compliance with this guarantee, the following
shall be used as fixed quantities and allowances:

 Taxi-Out: 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Takeoff and Climbout Maneuver: 

 

	 	Fuel	***Pounds 

	 	Distance	***Miles 

	 	Time	***Minutes 

 Approach and Landing Maneuver: 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Taxi-In (shall be consumed from the reserve fuel): 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Usable reserve fuel remaining upon completion of the approach and landing
maneuver: *** Pounds 

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

Aircraft Performance Guarantees – Firm 737-800 Aircraft and 737-800 Substitution Aircraft

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SS15-0360    

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 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
13 
  

 For information purposes, the reserve fuel is either the greater of a minimum *** pounds, or
is based on a standard day temperature and a) a contingency fuel allowance equivalent to a continued cruise at the LRC Mach number at final cruise altitude and weight for a time equal to *** percent of the mission time from takeoff through the
completion of the approach and landing maneuver at the destination airport, b) a missed approach and flight to a *** nautical mile alternate, c) an approach and landing maneuver at the alternate airport, and d) a *** minute hold at *** feet above
the alternate airport with an altitude of *** feet. 
  

	2.1.4	Mission Payload 

 The payload for a stage length of *** nautical miles in still air
(equivalent to a distance of *** nautical miles with a *** knot headwind, representative of a *** route) using the conditions and operating rules defined below, shall not be less than the following guarantee value: 

 

	 	NOMINAL:	*** Pounds 

	 	TOLERANCE:	*** Pounds 

	 	GUARANTEE:	*** Pounds 

 Conditions and operating rules: 

 

			
	Stage	  	         The stage length is defined as the sum of the
distances for climb, cruise, and descent.

	 Length:
	  	
		
	 Takeoff:
	  	         The airport altitude is *** feet.

 The airport temperature is ***°C. 

The runway length is *** feet. 

The runway slope is *** percent downhill. 
  

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

Aircraft Performance Guarantees – Firm 737-800 Aircraft and 737-800 Substitution Aircraft

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	BOEING PROPRIETARY

 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
14 
  

 The following obstacle definition is based on a straight out departure where obstacle height
and distance are specified with reference to the liftoff end of the runway: 
  

											
		 		  	Distance	  		  	Height	  	
		 	1.	  	*** feet	  		  	*** feet	  	
		 	2.	  	*** feet	  		  	*** feet	  	

 Takeoff performance is based on an alternate forward center of gravity limit of *** percent of the mean
aerodynamic chord. 
 Maximum takeoff thrust is used for the takeoff. 

The takeoff gross weight shall conform to FAA Regulations. 

 

			
	 Climbout
 Maneuver:
	  	Following the takeoff to *** feet, the Aircraft accelerates to the recommended speed of *** KCAS while climbing to *** feet above the departure airport altitude and retracting flaps and landing gear.

  

	 	Climb:	        The Aircraft climbs from *** feet above the departure airport altitude to *** feet altitude at the recommended speed of *** KCAS. 

The Aircraft then accelerates at a rate of climb of *** feet per minute to the recommended climb speed for minimum block fuel. 

The climb continues at the recommended climb speed for minimum block fuel until *** Mach number is reached. 

The climb continues at *** Mach number to the initial cruise altitude. 

The temperature is ISA***°C during climb. 

Maximum climb thrust is used during climb. 

  
  

			
	 Attachment to
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 Attachment to Letter Agreement 

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CFM56-7B*** Engines 
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	 	Cruise:	The Aircraft cruises at *** Mach number. 

 The initial cruise altitude is *** feet. 

A step climb or multiple step climbs of *** feet altitude may be used when beneficial to minimize fuel burn. 

The temperature is ISA***°C during cruise. 

The cruise thrust is not to exceed maximum cruise thrust except during a step climb when maximum climb thrust may be used. 

 

	 	Descent:	The Aircraft descends from the final cruise altitude at *** KCAS to an altitude of *** feet above the destination airport altitude. 

Throughout the descent, the cabin pressure will be controlled to a maximum rate of descent equivalent to *** feet per minute ***. 

The temperature is ISA***°C during descent. 
  

			
	Approach and Landing Maneuver:	  	The Aircraft decelerates to the final approach speed while extending landing gear and flaps, then descends and lands.

 The destination airport altitude is *** feet. 

 

			
	Fixed Allowances:	  	For the purpose of this guarantee and for the purpose of establishing compliance with this guarantee, the following shall be used as fixed quantities and allowances:

 Taxi-Out: 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

Aircraft Performance Guarantees – Firm 737-800 Aircraft and 737-800 Substitution Aircraft

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CFM56-7B*** Engines 
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 Takeoff and Climbout Maneuver: 

 

	 	Fuel	*** Pounds 

	 	Distance	*** Miles 

	 	Time	*** Minutes 

 Approach and Landing Maneuver: 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Taxi-In (shall be consumed from the
reserve fuel): 
  

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Usable reserve fuel remaining upon completion of the approach and landing
maneuver: *** Pounds 
 For information purposes, the reserve fuel is based on a standard day temperature and a) a contingency fuel
allowance equivalent to *** minutes of continued cruise starting at the end of the mission cruise and at the LRC Mach number, b) a missed approach and flight to a *** nautical mile alternate, c) an approach and landing maneuver at the alternate
airport, and d) a *** minute hold at *** feet above the destination airport. 
  

	2.1.5	Mission Block Fuel 

 The block fuel for a stage length of *** nautical miles in still
air with a *** pound payload using the conditions and operating rules defined below, shall not be more than the following guarantee value: 
  

	 	NOMINAL:	*** Pounds 

	 	TOLERANCE:	*** Pounds 

	 	GUARANTEE:	*** Pounds 

 Conditions and operating rules: 

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

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 Attachment to Letter Agreement 

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CFM56-7B*** Engines 
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	 	Stage Length:	The stage length is defined as the sum of the distances for climb, cruise, and descent. 

  

	 	Block Fuel:	The block fuel is defined as the sum of the fuel used for taxi-out, takeoff and climbout maneuver, climb, cruise, descent, approach and landing maneuver, and taxi-in.

  

	 	Takeoff:	The airport altitude is ***. 

 The takeoff gross weight is not limited by the airport
conditions. 
 Takeoff performance is based on an alternate forward center of gravity limit of *** percent of the mean aerodynamic chord.

 Maximum takeoff thrust is used for the takeoff. 

The takeoff gross weight shall conform to FAA Regulations. 

 

			
	 Climbout Maneuver:
	 	 Following the takeoff to *** feet, the Aircraft accelerates to the recommended speed of *** KCAS while climbing to ***
feet above the departure airport altitude and retracting flaps and landing gear.

  

	 	Climb:	The Aircraft climbs from *** feet above the departure airport altitude to *** feet altitude at the recommended speed of *** KCAS. 

The Aircraft then accelerates at a rate of climb of *** feet per minute to the recommended climb speed for minimum block fuel. 

The climb continues at the recommended climb speed for minimum block fuel until *** Mach number is reached. 

The climb continues at *** Mach number to the initial cruise altitude. 

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

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 Attachment to Letter Agreement 

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CFM56-7B*** Engines 
 Page
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 The temperature is ISA***°C during climb. 

Maximum climb thrust is used during climb. 
  

	 	Cruise:	The Aircraft cruises at *** Mach number. 

 The initial cruise altitude is *** feet. 

A step climb or multiple step climbs of *** feet altitude may be used when beneficial to minimize fuel burn. 

The temperature is ISA***°C during cruise. 

The cruise thrust is not to exceed maximum cruise thrust except during a step climb when maximum climb thrust may be used. 

 

	 	Descent:	The Aircraft descends from the final cruise altitude at *** Mach number until *** KCAS is reached. 

The descent continues at *** KCAS to an altitude of *** feet above the destination airport altitude. 

Throughout the descent, the cabin pressure is controlled to a maximum rate of descent equivalent to *** feet per minute ***. 

The temperature is ISA***°C during descent. 
  

			
	 Approach and Landing Maneuver:
	 	 The Aircraft decelerates to the final approach speed while extending landing gear and flaps, then descends and
lands.

 The destination is *** airport. 

  
  

			
	 Attachment to
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 Attachment to Letter Agreement 

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CFM56-7B*** Engines 
 Page
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	 Fixed Allowances:
	 	 For the purpose of this guarantee and for the purpose of establishing compliance with this guarantee, the following
shall be used as fixed quantities and allowances:

 Taxi-Out: 

 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Takeoff and Climbout Maneuver: 

 

	 	Fuel	*** Pounds 

	 	Distance	*** Miles 

	 	Time	*** Minutes 

 Approach and Landing Maneuver: 

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Taxi-In (shall be consumed from the
reserve fuel): 
  

	 	Fuel	*** Pounds 

	 	Time	*** Minutes 

 Usable reserve fuel remaining upon completion of the approach and landing
maneuver: *** Pounds 
 For information purposes, the reserve fuel is based on a standard day temperature and a) a contingency fuel
allowance equivalent to *** minutes of continued cruise starting at the end of the mission cruise and at the LRC Mach number, b) a missed approach and flight to a *** nautical mile alternate, c) an approach and landing maneuver at the alternate
airport, and d) a *** minute hold at *** feet above the destination airport. 
  

	2.1.6	Operational Empty Weight Basis 

 The Operational Empty Weight (OEW) derived in Paragraph
2.1.7 is the basis for the mission guarantees of Paragraphs 2.1.1, 2.1.2, 2.1.3, 2.1.4, and 2.1.5. 

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

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 Attachment to Letter Agreement 

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CFM56-7B*** Engines 
 Page
20 
  

 2.1.7 737-800 Weight Summary - United Airlines 

 

			
		  	Pounds
	Standard Model Specification MEW	  	***

  

					
	 ***
	  			
		
	 *** Passengers
	  			
	 CFM56-7 Engines
	  			
	 *** lb (*** kg) Maximum Taxi Weight
	  			
	 *** U.S. Gallons (*** Liters) Fuel Capacity
	  			
	 Changes for United Airlines
	  			
	 *** *
	  	 	***	 
	 ***Interior
	  			
	 *** Maximum Taxi Weight
	  	 	***	 
	 ***
	  	 	***	 
	 ***
	  	 	***	 
	 ***
	  	 	***	 
	 ***
	  	 	***	 
	 ***
	  	 	***	 
	 ***
	  	 	***	 
	 ***
	  	 	***	 
	 ***
	  	 	***	 
	 ***
	  	 	***	 
		
	 United Airlines Manufacturer’s Empty Weight (MEW)
	  	 	***	 
		
	 Standard and Operational Items Allowance
(Paragraph 2.1.8)
	  	 	***	 
		
	 United Airlines Operational Empty Weight (OEW)
	  	 	***	 

  

									
	 	  	Quantity	 	Pounds	 	Pounds	 	 
	 * ***:
	  		 		 	***	 	
	 ***
	  	***	 	***	 		 	
	 ***
	  	***	 	***	 		 	
	 ***
	  	***	 	***	 		 	

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

Aircraft Performance Guarantees – Firm 737-800 Aircraft and 737-800 Substitution Aircraft

AERO-B-BBA4-M15-0858    
	  	 SA-13

 
 Page 20

SS15-0360    

	BOEING PROPRIETARY

 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
21 
  

 2.1.8 Standard and Operational Items Allowance 

 

																	
	 	  	Qty	 	 	Pounds	 	 	Pounds	 	 	Pounds	 
	 Standard Items Allowance
	  				 				 				 	 	***	 
					
	 Unusable Fuel
	  				 				 	 	***	 	 			
	 Oil
	  				 				 	 	***	 	 			
	 Oxygen Equipment
	  				 				 	 	***	 	 			
	 Miscellaneous Equipment
	  				 				 	 	***	 	 			
	 Galley Structure & Fixed Inserts
	  				 				 	 	***	 	 			
					
	 Operational Items Allowance
	  				 				 				 	 	***	 
					
	 Crew and Crew Baggage
	  				 				 	 	***	 	 			
	 Flight Crew
	  	 	***	 	 	 	***	 	 				 			
	 Cabin Crew
	  	 	***	 	 	 	***	 	 				 			
	 Crew Baggage
	  	 	***	 	 	 	***	 	 				 			
	 Catering Allowance & Removable Inserts
	  				 				 	 	***	 	 			
	 First Class
	  	 	***	 	 	 	***	 	 				 			
	 Premium Economy Class
	  	 	***	 	 	 	***	 	 				 			
	 Economy Class
	  	 	***	 	 	 	***	 	 				 			
	 Passenger Service Equipment
	  	 	***	 	 				 	 	***	 	 			
	 Potable Water - *** USG
	  				 				 	 	***	 	 			
	 Waste Tank Disinfectant
	  				 				 	 	***	 	 			
	 Emergency Equipment (Incl. Life Vests & Life Rafts/ELT)
	  				 				 	 	***	 	 			
					
	 Total Standard and Operational Items Allowance
	  				 				 				 	 	*	** 

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

Aircraft Performance Guarantees – Firm 737-800 Aircraft
and 737-800 Substitution Aircraft

AERO-B-BBA4-M15-0858    
	  	 SA-13

 
 Page 21

SS15-0360    

	BOEING PROPRIETARY

 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
22 
  

			
	3	  	AIRCRAFT CONFIGURATION
		
	3.1	  	The guarantees contained in this Attachment are based on the Aircraft configuration as defined in ***, plus any changes mutually agreed upon or otherwise allowed by the Purchase Agreement to be incorporated into the
Customer’s Detail Specification (herein referred to as the Detail Specification). Appropriate adjustment shall be made for changes in such Detail Specification approved by the Customer and Boeing or otherwise allowed by the Purchase Agreement
which cause changes to the flight performance and/or weight and balance of the Aircraft. Such adjustment shall be accounted for by Boeing in its evidence of compliance with the guarantees.
		
	3.2	  	The guarantee payloads of Paragraph 2.1.1, 2.1.2, 2.1.3, and 2.1.4 and the specified payload of the Paragraph 2.1.5 block fuel guarantee will be adjusted by Boeing for the effect of the following on OEW in its evidence of
compliance with the guarantees:
		
		  	(1) Changes to the Detail Specification or any other changes mutually agreed upon between the Customer and Boeing or otherwise allowed by the Purchase Agreement.
		
		  	(2) The difference between the component weight allowances given in Appendix E of the Detail Specification and the actual weights.
		
	4	  	GUARANTEE CONDITIONS
		
	4.1	  	All guaranteed performance data are based on the International Standard Atmosphere (ISA) and specified variations therefrom; altitudes are pressure altitudes.
		
	4.2	  	The Federal Aviation Administration (FAA) regulations referred to in this Attachment are, unless otherwise specified, the 737-800 Certification Basis regulations specified in the Type
Certificate Data Sheet A16WE, Revision 44, dated August 24, 2009.
		
	4.3	  	In the event a change is made to any law, governmental regulation or requirement, or in the interpretation of any such law, governmental regulation or requirement that affects the certification basis for the Aircraft as described
in Paragraph 4.2, and as a result thereof, a

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

Aircraft Performance Guarantees – Firm 737-800 Aircraft
and 737-800 Substitution Aircraft

AERO-B-BBA4-M15-0858    
	  	 SA-13

 
 Page 22

SS15-0360

	BOEING PROPRIETARY

 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B*** Engines 
 Page
23 
  

			
		  	change is made to the configuration and/or the performance of the Aircraft in order to obtain certification, the guarantees set forth in this Attachment shall be appropriately modified to reflect any such change.
		
	4.4	  	The takeoff portion of the mission guarantees are based on hard surface, level and dry runways with no wind or obstacles, no clearway or stopway, *** mph tires, with *** brakes and anti-skid operative, *** minute takeoff thrust,
and with the Aircraft center of gravity at the most forward limit unless otherwise specified. The takeoff performance is based on no engine bleed for air conditioning or thermal anti-icing and ***. Unbalanced field length calculations and the
improved climb performance procedure will be used for takeoff as required.
		
	4.5	  	The climb, cruise and descent portions of the mission guarantees include allowances for normal power extraction and engine bleed for normal operation of the air conditioning system. Normal electrical power extraction shall be
defined as not less than a *** kilowatts total electrical load. Normal operation of the air conditioning system shall be defined as pack switches in the “Auto” position, the temperature control switches in the “Auto” position
that results in a nominal cabin temperature of ***°F, and all air conditioning systems operating normally. This operation allows a maximum cabin pressure differential of *** pounds per square inch at higher altitudes, with a nominal Aircraft
cabin ventilation rate of *** cubic feet per minute including passenger cabin recirculation (nominal recirculation is *** percent). ***.
		
	4.6	  	The climb, cruise and descent portions of the mission guarantees are based on an Aircraft center of gravity location of *** percent of the mean aerodynamic chord.
		
	4.7	  	Performance, where applicable, is based on a fuel Lower Heating Value (LHV) of *** BTU per pound and a fuel density of *** pounds per U.S. gallon.

  
  

			
	 Attachment to
UAL-PA-03784-LA-1601973R1

Aircraft Performance Guarantees – Firm 737-800 Aircraft

        and 737-800 Substitution
Aircraft
 AERO-B-BBA4-M15-0858    
	  	 SA-13

 
 Page 23

SS15-0360    

	BOEING PROPRIETARY

 Attachment to Letter Agreement 

No. UAL-PA-03784-LA-1601973R1 

CFM56-7B26E Engines 
 Page
24 
  

			
	5	  	GUARANTEE COMPLIANCE
		
	5.1	  	Compliance with the guarantees of Section 2 shall be based on the conditions specified in those sections, the Aircraft configuration of Section 3 and the guarantee conditions of Section 4.
		
	5.2	  	Compliance with the takeoff portion of the mission guarantee shall be based on the FAA approved Airplane Flight Manual for the Model 737-800.
		
	5.3	  	Compliance with the climb, cruise and descent portions of the mission guarantees shall be established by calculations based on flight test data obtained from an aircraft in a configuration similar to that defined by the Detail
Specification.
		
	5.4	  	The OEW used for compliance with the mission guarantees shall be the actual MEW plus the Standard and Operational Items Allowance in Appendix E of the Detail Specification.
		
	5.5	  	The data derived from tests shall be adjusted as required by conventional methods of correction, interpolation or extrapolation in accordance with established engineering practices to show compliance with these
guarantees.
		
	5.6	  	Compliance shall be based on the performance of the airframe and engines in combination, and shall not be contingent on the engine meeting its manufacturer’s performance specification.
		
	6	  	EXCLUSIVE GUARANTEES
		
		  	The only performance guarantees applicable to the Aircraft are those set forth in this Attachment.

  

			
	Attachment to UAL-PA-03784-LA-1601973R1	  	SA-13
	Aircraft Performance Guarantees – Firm 737-800 Aircraft	  	
	        and 737-800 Substitution Aircraft	  	Page 24
	AERO-B-BBA4-M15-0858	  	SS15-0360

  

					
		  		  	
		  	BOEING PROPRIETARY	  	

					
	 

	  		  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 	  	 

  

 UAL-LA-1604287 

United Airlines, Inc. 
 233 South Wacker Drive 

Chicago, Illinois 60606 
  

			
	Subject:	  	 Certain*** (Letter Agreement)

		
	References:	  	 (1)    Aircraft General Terms Agreement between The Boeing Company
(Boeing) and United Airlines, Inc. (Customer) identified as AGTA-UAL (AGTA);

		
		  	 (2)    Purchase Agreement No. 3776 between the parties relating to
Model 737-9 aircraft, including Letter Agreement UAL-PA-03776-LA- 1207637 entitled
“*** Matters” (MAX PDP Letter);

		
		  	 (3)    Purchase Agreement No. 3784 between the parties relating to
Model 737NG aircraft, including Letter Agreement UAL-PA-03784-LA- 1208155R2 entitled “*** Matters: 737-*** and 2016 737NG Aircraft” (NG PDP Letter);

		
		  	 (4)    Purchase Agreement No. 3860 between the parties relating to
Model 787 aircraft, including Section 3 of Letter Agreement UAL-PA-03860- LA-1209413R1 entitled “Special Matters”
(787 PDP Matters Section of the Special Matters Letter); and

		
		  	 (5)    Purchase Agreement No. 04308 between the parties relating to
Model 777-300ER aircraft, including Letter Agreement UAL-PA- 04308-LA-1404408R1 entitled
“*** Matters” (777 PDP Letter), (references (2) through (5) are referred to herein as the Purchase Agreement or Purchase Agreements as the context requires).

 Ladies and gentlemen: 

All terms used but not defined in this Letter Agreement shall have the same meaning as in the corresponding purchase agreement or AGTA, as
applicable. 

  

					
	 UAL-LA-1604287
	 		  	
	Certain ***	  	LA Page 1
		  	

			
	 

	  	

  

	 	1.	*** Matter ***. 

 Notwithstanding the *** Schedule contained in Table 1 of each of the
Purchase Agreements or the terms set forth in the 777 PDP Letter, the 787 PDP Matters Section of the Special Matters Letter, the NG PDP Letter and the MAX PDP Letter (collectively, the UAL PDP Letters or UAL PDP Letter as the context
requires), Customer *** for any Aircraft on order as of the date of signing the applicable Purchase Agreement, and for any *** Aircraft in accordance with the terms of the applicable UAL PDP Letter; provided, however, that Customer shall retain the
right to either (a) *** set forth in any of the UAL PDP Letters, and to the extent that Customer *** then Customer’s *** shall be *** or (b) *** provided that (1) Boeing *** to such *** and (2) such ***. 

 

	 	2.	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-04308-LA-1404407 of the 777 Purchase Agreement entitled “Privileged and Confidential Matters”. 

Very truly yours, 
 THE BOEING COMPANY 

 

			
	 By:
	 	 /s/ Irma L. Krueger

		
	 Its:
	 	
Attorney-In-Fact

  

					
	 UAL-LA-1604287
	 		  	
	Certain ***	  	LA Page 2
		  	

			
	 

	  	

  

 AGREED AND ACCEPTED this 27th day of December of
2016 
 UNITED AIRLINES, INC. 
  

	
	 /s/ Gerald Laderman

	Signature
	
	 Gerald Laderman

	Printed Name
	
	 Senior Vice President Finance,
        Procurement and
Treasurer

	Title

  

					
	UAL-LA-1604287	 		  	
	Certain ***	  	LA Page 3EX-10.183

 Exhibit 10.183 

CONFIDENTIAL MATERIAL APPEARING IN THIS DOCUMENT HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION IN ACCORDANCE WITH THE
SECURITIES ACT OF 1933, AS AMENDED, AND RULE 24B-2 PROMULGATED THEREUNDER. OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS. 

Supplemental Agreement No. 7 

to 
 Purchase Agreement
No. 03776 
 between 
 The
Boeing Company 
 and 
 United
Airlines, Inc. 
 Relating to Boeing Model 737-9 Aircraft 

THIS SUPPLEMENTAL AGREEMENT, entered into as of December 27th, 2016, by and between THE BOEING COMPANY (Boeing) and UNITED
AIRLINES, INC. (Customer); 
 WHEREAS, the parties hereto entered into Purchase Agreement No. 3776 dated July 12, 2012, as
amended and supplemented (Purchase Agreement), relating to the purchase and sale of Boeing model 737-9 aircraft (Aircraft). This Supplemental Agreement is an amendment to the Purchase Agreement;

 WHEREAS, Boeing and Customer agree to *** 737-9 Aircraft as follows: 

 

							
	 	  	Manufacturer
Serial Number	 	Original Delivery
Month Prior to SA-7	 	New Delivery Month
Commencing With SA-7
	 ***
	  	***	 	***	 	***

  

					
	 UAL-PA-03776
	 	SA-7	  	Page 1
		 	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

 Supplemental Agreement No. 7 to 

Purchase Agreement No. 03776 
  

 WHEREAS, Customer and Boeing agree to cross model substitute sixty-one (61) 737-700 aircraft
with sixty-one (61) 737-9 aircraft as specified below in Figure 1 and in Purchase Agreement No. 3784 with each such 737-9 aircraft being referred to as a “Special MAX9 Aircraft” and to
incorporate applicable amendments to the Purchase Agreement: 
 Figure 1 

 

													
	 	    	Aircraft
Type at
SA-12	 	    	 Delivery

Month at

SA-12
	    	Aircraft
Type as
of SA-13	 	    	 New

Delivery

Month

	1	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	2	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	3	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	4	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	5	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	6	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	7	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	8	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	9	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	10	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	11	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	12	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	13	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	14	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	15	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	16	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	17	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	18	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	19	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	20	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	21	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	22	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	23	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	24	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	25	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	26	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	27	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	28	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	29	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	30	    	 	737-700	 	    	***	    	 	737-9	 	    	***
	31	    	 	737-700	 	    	***	    	 	737-9	 	    	***

													
	 	    	Aircraft
Type at
SA-12	 	    	Delivery
Month at
SA-12	  	Aircraft
Type as
of SA-13	 	    	New
Delivery
Month
	32	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	33	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	34	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	35	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	36	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	37	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	38	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	39	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	40	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	41	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	42	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	43	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	44	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	45	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	46	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	47	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	48	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	49	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	50	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	51	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	52	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	53	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	54	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	55	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	56	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	57	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	58	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	59	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	60	    	 	737-700	 	    	***	  	 	737-9	 	    	***
	61	    	 	737-700	 	    	***	  	 	737-9	 	    	***

 
 

  

					
	
UAL-PA-03776
	 	SA-7	  	Page 2
		 	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

 Supplemental Agreement No. 7 to 

Purchase Agreement No. 03776 
  

 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-7”). 
  

	2.	Tables. 

 Table 1 entitled “737-9 Aircraft Delivery, Description, Price and
***” is deleted in its entirety and replaced with the attached similarly titled “Table 1” (identified by “SA-7”). 

 

	3.	Supplemental Exhibits. 

 Supplemental Exhibit BFE1 entitled “Buyer Furnished
Equipment Variables” is deleted in its entirety and replaced with the attached similarly titled Supplemental Exhibit BFE1 (identified by “SA-7”) to incorporate the Special MAX9 Aircraft. 

 

	4.	Letter Agreements. 

 4.1. Letter Agreement No. UAL-PA-03776-LA-1207644 entitled “*** Aircraft” is deleted in its entirety and replaced with Letter Agreement No. UAL-PA-03776-LA-1207644R1 to incorporate certain revisions regarding the aggregate quantity of
*** Aircraft under the Purchase Agreement. 
 4.2. Letter Agreement No. UAL-PA-03776-LA-1207650 entitled “Special Matters” is deleted in its entirety and replaced with Letter Agreement No. UAL-PA-03776-LA-1207650R1 to incorporate the Special MAX9 Aircraft. 

4.3. Letter Agreement
UAL-PA-03776-LA-1208055 entitled “***” is deleted in its entirety and replaced with Letter Agreement No. UAL-PA-03776-LA-1208055R1 to incorporate the Special MAX9 Aircraft. 

4.4. Letter Agreement No. UAL-PA-3776-LA-1606848 entitled “*** Special MAX9 Aircraft” is added to the Purchase Agreement to provide certain delivery ***. 

4.5. Letter Agreement UAL-LA-1604287 entitled “Certain ***” is hereby incorporated by the
Purchase Agreement. 
  

	5.	Miscellaneous. 

 5.1. If Boeing or Customer determines that an Exhibit, a Supplemental
Exhibit or a Letter Agreement should be further amended to incorporate Special MAX9 Aircraft, then Boeing and Customer will work together for a mutually agreeable solution. 

  

					
	
UAL-PA-03776
	 	SA-7	  	Page 3
		 	 BOEING / UNITED AIRLINES, INC. PROPRIETARY
	  	

 Supplemental Agreement No. 7 to 

Purchase Agreement No. 03776 
  

 5.2. Boeing and Customer agree to *** of *** pursuant to §2.2 of Supplemental Agreement
No. 13 to Purchase Agreement No. 3784 (SA-13 for 737NG) for application on the effective date of SA-13 for 737NG exclusively to Customer purchase
agreement payment obligations as follows: 
  

																															
	 	  	 	  	Purchase
Agreement
No. 3784	  	Purchase
Agreement
No. 3776	  	Purchase
Agreement
No. 3860	  	Purchase
Agreement
No. 4308	  	TOTAL
	 Amount due for

SA-7 to Purchase

Agreement No.

3776:

(61) 737-9 Aircraft
	  	 				  	 				  	 	 	$***		  	 				  	 				  	 	 	$***	
							
	 Payment

Application Date
	  	Payment
Due Date	  	 	  	 	  	 	  	 	  	 
	 Effective date of

SA 13 for 737NG
	  	 	 	***		  	 	$	***		  	 	$	***		  	 	$	***		  	 	$	***		  	 	$	***	
	 Effective date

SA 13 for 737NG
	  	 	 	***		  	 				  	 	$	***		  	 	$	***		  	 	$	***		  	 	$	***	
	 Effective date

SA 13 for 737NG
	  	 	 	***		  	 	$	***		  	 	$	***		  	 	$	***		  	 	$	***		  	 	$	***	
	 Effective date

SA 13 for 737NG
	  	 	 	***		  	 	$	***		  	 	$	***		  	 	$	***		  	 	$	***		  	 	$	***	
		  	 				  	 	  
	  
	 	  	 	  
	  
	 	  	 	  
	  
	 	  	 	  
	  
	 	  	 	  
	  
	 
	 Total
	  	 				  	 	$	***		  	 	$	***		  	 	$	***		  	 	$	***		  	 	$	***	
		  	 				  	 	  
	  
	 	  	 	  
	  
	 	  	 	  
	  
	 	  	 	  
	  
	 	  	 	  
	  
	 

 The Purchase Agreement will be deemed supplemented to the extent provided herein as of the date hereof and as
so supplemented will continue in full force and effect. 
 The rest of this page is left intentionally blank. 

  

					
	
UAL-PA-03776
	 	SA-7	  	Page 4
		 	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

 Supplemental Agreement No. 7 to 

Purchase Agreement No. 03776 
  

 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
	  		  		  	 Senior Vice President Finance,
Procurement and Treasurer

		  	Title	  		  		  	Title

  

					
	
UAL-PA-03776
	 	SA-7	  	Page 5
		 	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.
	  	Aircraft Information Table – 737-9	  	SA-7
		
	 EXHIBITS
	  	
			
	       A.
	  	Aircraft Configuration	  	
	       B.
	  	Aircraft Delivery Requirements and Responsibilities	  	
		
	 SUPPLEMENTAL EXHIBITS
	  	
			
	       AE1.
	  	Escalation Adjustment/Airframe and Optional Features	  	
	       BFE1.
	  	BFE Variables	  	SA-7
	       CS1.
	  	Customer Support Variables	  	
	       EE1.
	  	Engine Warranty ***	  	
	       SLP1.
	  	Service Life Policy Components	  	
		
	 LETTER AGREEMENTS
	  	
			
	
UAL-PA-03776-LA-1207637
	  	*** Matters	  	
	
UAL-PA-03776-LA-1207638
	  	***	  	
	
UAL-PA-03776-LA-1207640
	  	Demonstration Flight Waiver	  	
	
UAL-PA-03776-LA-1207643
	  	Open Matters	  	
	 UAL-PA-03776-LA-1207644R1
	  	*** Aircraft	  	SA-7
		  	*** Aircraft - Attachment A	  	SA-6
	
UAL-PA-03776-LA-1207646
	  	Promotional Support	  	
	
UAL-PA-03776-LA-1207647
	  	Seller Purchased Equipment	  	
	
UAL-PA-03776-LA-1207649
	  	Spare Parts Initial Provisioning	  	
	 UAL-PA-03776-LA-1207650R1
	  	Special Matters	  	SA-7
	 UAL-PA-03776-LA-1208055R1
	  	***	  	SA-7
	
UAL-PA-03776-LA-1208122
	  	***	  	
	
UAL-PA-03776-LA-1208123
	  	*** Matters	  	
	
UAL-PA-03776-LA-1208157
	  	***	  	

  

					
	
UAL-PA-03776
	 	TABLE OF CONTENTS	  	SA-7, Page 1 of 2
		 	BOEING/UNITED AIRLINES, INC. PROPRIETARY	  	

 TABLE OF CONTENTS, CONTINUED 

 

					
	 LETTER AGREEMENTS, continued
	  		  	SA
 NUMBER

			
	
UAL-PA-03776-LA-1208234
	  	Privileged and Confidential Matters	  	
	
UAL-PA-03776-LA-1208596
	  	AGTA Matters	  	
	
UAL-PA-03776-LA-1208238
	  	Assignment Matters	  	
	
UAL-PA-03776-LA-1208869
	  	Delivery *** Matters	  	
	
UAL-PA-03784-LA-1207869
	  	737 Production Adjustments	  	
	 UAL-PA-3776-LA-1606848
	  	*** Special MAX9 Aircraft	  	SA-7
			
	 UAL-LA-1604287
	  	Certain ***	  	Dec. 2016
		  		  	Letter
		  		  	Agreement
		  		  	No. 1

  

					
	 SUPPLEMENTAL AGREEMENTS
	  	 DATED AS OF
	 
		
	 Supplemental Agreement No. 1
	  	 	June 17, 2013	 
		
	 Supplemental Agreement No. 2
	  	 	January 14, 2015	 
		
	 Supplemental Agreement No. 3
	  	 	May 26, 2015	 
		
	 Supplemental Agreement No. 4
	  	 	June 12, 2015	 
		
	 Supplemental Agreement No. 5
	  	 	January 20, 2016	 
		
	 Supplemental Agreement No. 6
	  	 	February 8, 2016	 
		
	 Supplemental Agreement No. 7
	  	 	December 27, 2016	 
		
	 Dec. 2016 Letter Agreement No. 1:

UAL-LA-1604287 entitled “Certain ***”
	  	 	December 27, 2016	 

  

					
	
UAL-PA-03776
	 	TABLE OF CONTENTS	  	SA-7, Page 2 of 2
		 	BOEING/UNITED AIRLINES, INC. PROPRIETARY	  	

 Table 1 To Purchase Agreement No. 03776 

737-9 Aircraft Delivery, Description, Price and *** 

 

																													
	 Airframe Model/MTOW:
	  		  	737-9	  	 	*** pounds	 	 		  	 Detail Specification:
	  	 	***	 	  				  				  			
										
	 Engine Model/Thrust:
	  	***	  		  	 	*** pounds	 	 		  	 Airframe Price Base Year/Escalation Formula:
	  				  	 	***	 	  				  	 	***	 
										
	 Airframe Price:
	  		  		  	$	***	 	 		  	 Engine Price Base Year/Escalation Formula:
	  				  	 	***	 	  				  	 	***	 
										
	 Optional Features:
	  		  		  	$	***	 	 		  	 Airframe Escalation Data: 
	  				  				  				  			
		  		  		  	  
	  
	 	 		  		  				  				  				  			
								
	 Sub-Total of Airframe and Features:
	  	$	***	 	 		  	 Base Year Index (ECI):
	  				  				  	 	***	 	  			
								
	 Engine Price (Per Aircraft):
	  	$	***	 	 		  	 Base Year Index (CPI):
	  				  				  	 	***	 	  			
		  		  		  	  
	  
	 	 		  		  				  				  				  			
								
	 Aircraft Basic Price (Excluding BFE/SPE):
	  	$	***	 	 		  		  				  				  				  			
		  		  		  	  
	  
	 	 		  		  				  				  				  			
								
	 Buyer Furnished Equipment (BFE) Estimate:
	  	$	***	 	 		  		  				  				  				  			
								
	 Seller Purchased Equipment (SPE) Estimate:
	  	$	***	 	 		  		  				  				  				  			
								
	 Deposit per Aircraft:
	  	$	***	 	 		  		  				  				  				  			

  

																					
	 # of

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

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

	 ***
	  	  ***  	  	***	  	***	  	***	  	***	  	$***	  	$***	  	$***	  	$***	  	$***
		  		  	  
	  		  		  		  		  		  		  		  	
	 	  	Total:	  	  ***  	  	 	  	 	  	 	  	 	  	 	  	 	  	 	  	 

  

	*	Nominal delivery month, *** pursuant to Letter Agreement number
UAL-PA-03776-LA-1207643. 

Note: Serial Numbers are provided as guidance only and are subject to change. 

*** 

  

					
	UAL-PA-03776 64721-1F.TXT	 	Boeing / United Airlines, Inc. Proprietary	 	Table 1 per SA-7, Page 1

 BUYER FURNISHED EQUIPMENT VARIABLES 

between 
 THE BOEING
COMPANY 
 and 

United Airlines, Inc. 

Supplemental Exhibit BFE1 

to Purchase Agreement Number PA-03776 

  

					
	UAL-PA-03776-BFE1, Page 1	  	SA-7
		 	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: 

 

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

  

	*	For a new certification, supplier requires notification *** prior to 

	***	on-dock date. 

	**	Actual Supplier Selection dates will be provided when the final monthly delivery positions are available to Customer. 

Customer will enter into initial agreements with the selected *** suppliers on or before *** after the above supplier selection dates
to actively participate with Customer and Boeing in coordination actions including the Initial Technical Coordination Meeting (ITCM). 

  

					
	UAL-PA-03776-BFE1, Page 2	  	SA-7
		 	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. 

http://www.boeing.com/companyoffices/doingbiz/supplier  portal/index  general.html 

  

					
	UAL-PA-03776-BFE1, Page 1	  	SA-7
		 	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

 Attachment 1 to Supplemental Exhibit BFE1 

 

																							
	 Nominal

Del Date
	 	 Aircraft

Qty
	 	 ***
	 	 ***
	 	 ***
	 	 ***
	 	 ***
	 	 ***
	 	 ***
	 	 ***
	 	 ***
	 	 ***

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

  

					
	UAL-PA-03776-BFE1	  	SA-7
		  	Attachment 1, Page 1
		 	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 

  

 UAL-PA-03776-LA-1207644R1 
 United Airlines, Inc. 

233 South Wacker Drive 
 Chicago, Illinois 60606 

 

	Subject:	        *** Aircraft – 737-9 

  

	Reference:    Purchase	Agreement No. PA-03776 (Purchase Agreement) between The Boeing Company (Boeing) and 

	                      United 	Continental Holdings, Inc. (Customer) relating to Model 737-9 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 Table 1 to the Purchase Agreement as of the date of execution of this Letter Agreement, Customer will have the *** Model 737-9 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 *** consisting of a nominal delivery month (Nominal Delivery Month) plus and minus ***. 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 737-9 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 *** (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. 

  

					
	UAL-PA-03776-LA-1207644R1	 		  	
	*** Aircraft – 737-9	  	Page 1
	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	

  

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

	4.	Price. 

 4.1 The Airframe Price and Optional Features Prices for each of the *** Aircraft
is identified in Attachment A to this Letter Agreement. ***. 
 4.2 The Airframe Price, Optional 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 (Escalation Adjustment) of the AGTA. 

4.3 The *** 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 *** 

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

  

					
	UAL-PA-03776-LA-1207644R1	 		  	
	*** Aircraft – 737-9	  	Page 2
	 BOEING / UNITED AIRLINES, INC. PROPRIETARY

 
 Execution Version
SA-7 to 737*** Purchase Agreement No. 03776, Page 25 of 52
	  	

			
	 

	  	

  

 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 ***. 
  

	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 *** 
 6.3 If at any given
time, the aggregate number of *** Aircraft *** Aircraft, then Customer may request for Boeing to *** 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 *** 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 *** for *** Aircraft. 

6.3.2 In response to any Customer request for ***, Boeing will provide a written notice for Customer’s consideration and written
acceptance within *** of such Boeing notice. Delivery months will be specified in Boeing’s notice for confirmation by Customer through execution of a supplemental agreement incorporating *** Aircraft. Delivery positions of *** 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 *** days 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 *** for *** Aircraft and shall have no further obligation with respect to *** Aircraft. 

  

					
	UAL-PA-03776-LA-1207644R1	 		  	
	*** Aircraft – 737-9	  	Page 3
	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	

  

	8.	Assignment. 

 Except as provided in Letter Agreement No.
UCH-PA-03776-LA-1208238, 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-03776-LA-1208234. 
 Very truly yours, 

 

			
	THE BOEING COMPANY
		
	By:	 	 Irma L. Krueger

		
	Its:	 	
Attorney-in-Fact

  

					
	UAL-PA-03776-LA-1207644R1	 		  	
	*** Aircraft – 737-9	  	Page 4
	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	

  

 ACCEPTED AND AGREED TO this 
  

			
	 Date:
	 	 December 27, 2016

	
	UNITED AIRLINES, INC.
		
	 By:
	 	 /s/ Gerald Laderman

		 	Senior Vice President
		
	 Its:
	 	 Finance, Procurement & Treasurer

  

					
	UAL-PA-03776-LA-1207644R1	 		  	
	*** Aircraft – 737-9	  	Page 5
	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 

  

 UAL-PA-03776-LA-1207650R1 
 United Airlines, Inc. 

233 South Wacker Drive 
 Chicago, Illinois 60606 

 

			
	Subject:	  	Special Matters – 737 MAX Aircraft
		
	References:  	  	 1)      Purchase Agreement No.
PA-03776 (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-03776-1207638 entitled “Aircraft ***” (*** Letter)

 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-0 3776-LA-1207650 dated July 12, 2012. 
  

	1.	***. 

 1.1 ***. At the *** of each 737-9
Aircraft, Boeing *** to Customer *** in an *** the 737-9 Aircraft ***. 
 1.2 737-9 ***. At the *** of each 737-9 Aircraft, Boeing *** to Customer *** in an ***. Boeing represents that *** of this 737-9 *** is
consistent with the terms of Letter Agreement 6-1162-KKT-080, as amended. 

1.3 737-8 *** Aircraft ***. Pursuant to the *** Letter, Customer may *** of 737-8 aircraft *** (737-8 *** Aircraft). At the *** of each 737-8 *** Aircraft, Boeing *** to Customer *** (737-8 *** Aircraft ***). 

  

					
	
UAL-PA-03776-LA-1207650R1
	 		  	SA-7
	Special Matters	  	Page 1
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	

  

 1.4 737-7 *** Aircraft ***. Pursuant to the
*** Letter, Customer may *** 737-7 aircraft in place of certain Aircraft (737-7 *** Aircraft). At the time of delivery of each
737-7 *** Aircraft, Boeing *** to Customer *** 737-7 *** Aircraft *** (737-7 *** Aircraft ***). 

1.5 *** 737 *** and ***. 

The parties agree to the following *** which will *** Aircraft (*** Aircraft). 

1.5.1 At the time *** of each applicable *** 737-9 Aircraft, Boeing *** to Customer *** 737-9 Aircraft *** and *** to be used solely for the *** of Boeing *** and *** and shall not be applied to *** or ***. 

1.5.2 Boeing and Customer will work together to assess and agree to determine whether and how *** established in Attachment 1 is *** provided
in Attachment 2 to this Letter Agreement. Such assessment will incorporate the methodology and .assumptions incorporated in development of Attachment 1 to this Letter Agreement including *** to the effective date of Supplemental Agreement No. 7
to the 787 Purchase Agreement No. 3860 and *** in Attachment 1 to this Letter Agreement. 
  

	2.	***. 

 Unless otherwise noted, the *** stated in Paragraphs 1.1 through 1.5 ***
are in *** dollars and will be *** to the scheduled month of the respective Aircraft delivery pursuant to the *** formula set forth in the Purchase Agreement applicable to the Aircraft. The *** may, at the election of Customer, be *** Boeing *** and
*** (but shall ***). 
  

	3.	737-9 *** Configuration. 

 Boeing agrees to make
the 737 *** available for the 737-9 through Boeing’s standard pricing and offerability process (Offerable). In the event that Boeing does not make the 737 *** Offerable for delivery starting with
Customer’s *** 737-9 aircraft by its scheduled delivery month, then Boeing will *** of each 737-9 equal to *** for each 

  

					
	
UAL-PA-03776-LA-1207650R1
	 		  	SA-7
	Special Matters	  	Page 2
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	

  

 
passenger seat *** in the Aircraft configuration with the 737 *** as set forth in Attachment 1 to this Letter Agreement as opposed to the number of passenger seats in a 737-9 aircraft configuration (subject to the requirements in Attachment 3, unless otherwise mutually agreed) without the 737 *** per 737-9 Aircraft). For the avoidance
of doubt, Boeing’s *** the 737 *** will *** when the 737 *** (or any improved version of such which does not ***) becomes, and remains, Offerable for the 737-9 aircraft not yet delivered to Customer. 

 

	4.	737 Supplier Management. 

 It is Boeing’s 737 MAX design intent to maintain as much
commonality with the 737NG while also achieving the 737 MAX performance requirements (including, but not limited to, fuel bum, range, payload, etc.) that the market demands. If a *** leads to a Supplier Product to be available *** for the 737 MAX
where *** on the 737NG, or if an existing 737NG ***, then Boeing will ensure that *** the *** 737 MAX operators ***. These *** agreements, known as ***, will include (but not be limited to) enforceable provisions related to *** Boeing will
utilize *** efforts to ensure that the terms of such *** agreements are ***. 
  

	5.	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. 

 

	6.	Delivery ***. 

 Customer and Boeing agree that both Customer and Boeing will have certain
Aircraft ***. Such *** are provided to Customer and Boeing pursuant to Letter Agreement No. UAL-PA-03776-LA-1208869. 

 

	7.	Assignment. 

 Unless otherwise noted herein, the *** described in this Letter Agreement
are provided as *** to Customer and in consideration of *** 

  

					
	
UAL-PA-03776-LA-1207650R1
	 		  	SA-7
	Special Matters	  	Page 3
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	

  

 ***. Except as provided in Letter Agreement No. UAL-PA-03776-LA-1208238, this Letter Agreement cannot be assigned, in whole or in part, without the prior written consent of
Boeing. *** 
  

	8.	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-03776-LA-1208234. 
 Very truly yours, 

 

			
	THE BOEING COMPANY
		
	By:	 	 Irma L. Krueger

		
	Its:	 	
Attorney-in-Fact

  

					
	
UAL-PA-03776-LA-1207650R1
	 		  	SA-7
	Special Matters	  	Page 4
	BOEING / UNITED AIRLINES PROPRIETARY	  	

			
	 

	  	

  

 ACCEPTED AND AGREED TO this 
  

			
	 Date:
	 	 December 27, 2016

 UNITED AIRLINES, INC. 
  

			
	By:	 	 /s/ Gerald Laderman

		
	Its:	 	Senior Vice President Finance,
		 	         Procurement and Treasurer

  

					
	
UAL-PA-03776-LA-1207650R1
	 		  	SA-7
	Special Matters	  	Page 5
	BOEING / UNITED AIRLINES PROPRIETARY	  	

 Attachment 1 to Letter Agreement UAL-PA-03776-LA-1207650R1: *** 
 *** 

Current scenario: 
  

																																	
	 Year
	  	787-10 ***-	 	  	787-10 ***	 	  	777-300***	 	  	737 ***
and ***	 	  	Fixed ***
and ***+	 	  	***	 	  	 	 	  	 	 
	 ***
	  	 	***	 	  	 	***	 	  				  				  				  	 	***	 	  				  			
		  				  				  				  				  				  				  				  			
		  				  				  				  				  				  				  	 
 
	Discount
 Rate
	 
  
	  	 	***%	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			
	 Total
	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  				  			
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			
	 PV (***%)
	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	$	***	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			

 Alternative scenario: 
  

																																	
	 Col. 1
	  	Col. 2	 	  	Col. 3	 	  	Col. 4	 	  	Col. 5	 	  	Col. 6	 	  	Col. 7	 	  	 	 	  	 	 
	 Year
	  	787-10 ***-	 	  	787-10 ***	 	  	777-300***	 	  	Special 737-7 ***
and ***	 	  	*** +	 	  	***	 	  	  
	 ***
	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  				  			
		  				  				  				  				  				  				  				  			
		  				  				  				  				  				  				  	 
 
	Discount
 Rate
	 
  
	  	 	***%	 
	 Total
	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  				  			
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			
	 PV (***%)
	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	$	***	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			
		  				  				  				  	 	*** of Boeing ***:	 	  				  	 	***	 	  				  			
		  				  				  				  	  
	  
	 	  				  	  
	  
	 	  				  			

  

+ - Note: Payment dates for the “Fixed *** and
***” amounts and other related payments to Customer will be subject to adjustment as mutually agreed by the parties to reflect *** incorporated by the Supplemental Agreements executed on March 7 and this Supplemental Agreement 7. *** subsequent
to March 7 should be reviewed for *** to be issued in columns (5) and (6). 
  

			
	UAL-PA-03776-LA-1207650R1    	  	SA-7
	Special Matters	  	    Attachment 1 to UAL-PA-03776-LA-1207650R1, Page 1

 BOEING / UNITED AIRLINES PROPRIETARY 

 Attachment 2 to Letter Agreement UAL-PA-03776-LA-1207650R1: Limited 737-9 Aircraft *** 

*** 
 Current scenario: 

 

																																	
	 Year
	  	787-10 ***	 	  	787-10 ***	 	  	777-300***	 	  	737 ***
and ***	 	  	***
and ***	 	  	Total
Cashflow	 	  	 	 	  	 	 
	 ***
	  	 	***	 	  	 	***	 	  				  				  				  	 	***	 	  				  			
		  				  				  				  				  				  				  				  			
		  				  				  				  				  				  				  	 
 
	Discount
 Rate
	 
  
	  	 	***%	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			
	 Total
	  	 	***	 	  	 	***	 	  				  	 	—  	 	  	 	—  	 	  	 	***	 	  				  			
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			
	 PV (***%)
	  	 	***	 	  	 	***	 	  	 	—  	 	  	 	—  	 	  				  	 	***	 	  	 	***	 	  	$	***	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			

 Alternative scenario: ***s & 4th Quarter *** Forecast: 

 

																																	
	 Year
	  	787-10 ***	 	  	787-10 ***	 	  	777-300***	 	  	737 MAX9 ***
***	 	  	***	 	  	***	 	  	 	 	  	 	 
	 ***
	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  				  			
		  				  				  				  				  				  				  				  			
		  				  				  				  				  				  				  	 
 
	Discount
 Rate
	 
  
	  	 	***%	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			
	 Total
	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  				  			
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			
	 PV (***%)
	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	 	***	 	  	$	***	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  				  			

  

			
	UAL-PA-03776-LA-1207650R1	  	SA-7
	Special Matters	  	Attachment 2 to UAL-PA-03776-LA-1207650R1, Page 1

 BOEING / UNITED AIRLINES PROPRIETARY 

Execution Version SA-7 to 737MAX Purchase Agreement No. 03776, Page 35 of 52 

 Attachment 3 to Letter Agreement UAL-PA-03776-LA-1207650R1 

*** 
 Attachment 3 to Letter
Agreement UAL-PA-03776-LA-1207650R1 

01-20-12 

 

  

					
	
UAL-PA-03776-LA-1207650R1

 Special Matters
	 	Attachment 3 to UAL-PA-03776-LA-1207650R1,	  	SA-7
		 	BOEING / UNITED AIRLINES PROPRIETARY	  	Page 1

					
	 

	  		  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 	  	 

  

 UAL-PA-03776-LA-1208055R1 
 United Continental Holdings, Inc. 

233 South Wacker Drive 
 Chicago, Illinois 60606 

 

			
	 Subject:
	  	*** Program
		
	 Reference:
	  	Purchase Agreement No. PA-03776 (Purchase Agreement) between The Boeing Company (Boeing) and United Continental Holdings, Inc. (Customer) relating to Model 737-9 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-03776-LA-1208055 dated July 12, 2012. 
  

	1.	Definitions. 

 *** Notice means the written communication provided by Boeing to
Customer in accordance with the requirements of Article 4.1, below. 
 *** Aircraft will have the meaning specified in letter
agreement UAL-PA-03776-LA-1207644 relating to 737-9 *** Aircraft. 

Program Aircraft means each Aircraft specified in Table 1 of the Purchase Agreement as of the date of this Letter Agreement and any ***
Aircraft for which Customer has ***. 
  

	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 If the *** forecast, as set forth in Article 3, above, *** 

  

					
	UAL-PA-03776-LA-1208055R1	 		  	SA-7
	*** Program	  	Page 1
	BOEING / UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	

  

 
***, as set forth in Attachment B, *** any Program Aircraft that is *** such *** forecast, as set forth in Attachment A, then Boeing shall issue an *** Notice to the Customer by the date set
forth in Attachment A. Such *** Notice shall, ***, either: 
 4.1.1 *** for such affected Program Aircraft *** as set forth in Attachment B;
or 
 4.1.2 provide Customer with the *** as set forth in Attachment B and the actual *** factor determined in accordance with ***; or 

4.1.3 provide Customer with *** as set forth in Attachment B, with Boeing and Customer *** as set forth in Attachment B ***. 

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 ***
Customer, *** for the *** Program Aircraft. 
 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 to *** related to such *** Program Aircraft ***, by 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 *** in accordance with Article 4.1.2. 
  

  

					
	 UAL-PA-03776-LA-1208055R1
 ***
Program
	  	 SA-7

Page 2

	BOEING/UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	

  

 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.	***. 

 5.1 If the *** forecast, as set forth in Article 3, *** any Program Aircraft ***
as set forth in Attachment B and *** as set forth in Attachment B, *** for such Program Aircraft *** as set forth in Attachment B *** as set forth in Attachment B ***. 

5.2 In the event the *** at *** a Program Aircraft subject to Article 5.1 above, *** applicable to such Program Aircraft will be determined
pursuant to Article 6 below. 
 6. ***. 

If the *** forecast, as set forth in Article 3, above, ***, as set forth in Attachment B, *** any Program Aircraft *** such *** forecast, as
set forth in Attachment A, then such *** applicable to such Program Aircraft ***: 
 6.1 If the *** of a Program Aircraft, *** as set forth
in Attachment B for such Program Aircraft, then the *** for such Program Aircraft. 
 6.2 *** of a Program Aircraft, *** as set forth in
Attachment B for such Program Aircraft, then the *** for such Program Aircraft *** as set forth in Attachment B. 
  

  

					
	
UAL-PA-03776-LA-1208055R1
	 		  	SA-7
	*** Program	  	Page 3
	BOEING/UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	

  

  

	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 *** established in this Letter Agreement for such Program Aircraft *** provisions of the Purchase Agreement ***. 

 

	8.	Assignment. 

 Except as provided in Letter Agreement No.
UAL-PA-03776-LA-1208238, 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-03776-LA-1208234. 
 Very truly yours, 

THE BOEING COMPANY 
  

			
	 By
	 	 /s/ Irma L. Krueger

		
	 Its
	 	
Attorney-in-Fact

	
	ACCEPTED AND AGREED TO this
		
	 Date:
	 	 December 27, 2016

	
	UNITED AIRLINES, INC.
		
	By	 	 /s/ Gerald Laderman

		
	Its	 	Senior Vice President Finance,
		 	       Procurement and Treasurer

  

					
	 UAL-PA-03776-LA-1208055R1
 *** Program
	 		  	SA-7
		  	Page 4
	BOEING/UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	

  

 ATTACHMENT A 

*** Forecast & *** Notice Date 
  

					
	 ***

Forecast
	 	 Applicable to Program Aircraft

Delivering in Time Period
	 	 ***

Notice Date

	 ***
	 	 ***
	 	 ***

  

					
	
UAL-PA-03776-LA-1208055R1
	 		  	SA-7
	*** Program	  	Page 1
	BOEING/UNITED AIRLINES, INC. PROPRIETARY	  	

			
	 

	  	

  

 ATTACHMENT B 

*** Factors - *** 
  

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

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

  

					
	
UAL-PA-03776-LA-1208055R1
	 		  	SA-7
	*** Program	  	Page 1
	BOEING/UNITED AIRLINES, INC. PROPRIETARY	  	

					
	

	  		  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 	  	 

  

 UAL-PA-3776-LA-1606848 
 United Airlines, Inc. 

233 South Wacker Drive 
 Chicago, Illinois 60606 

 

	Subject:	*** Special MAX9 Aircraft 

  

	Reference:	Purchase Agreement No. PA-03776 (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 have the same meaning as in the Purchase Agreement. References to the Purchase Agreement are to the Purchase Agreement as amended from time to time, including by way of this Letter Agreement
and other letter agreements between Boeing and Customer. 
  

	1.	*** 

 Customer has the right to *** the delivery of any of the *** Special MAX9 Aircraft
from *** delivery month into ***, pursuant to the terms of this Letter Agreement ***. For the avoidance of doubt, the aggregate maximum number of *** is ***. 
  

	2.	Notice Requirement. 

 Customer will provide written notice (*** Notice) of its
intent to *** purchase of any eligible Special MAX9 Aircraft no later than the Exercise Notice Due Date specified in Attachment 1 to this Letter Agreement. Each such ***Special MAX9 Aircraft, once confirmed with Boeing as specified in Section 4
herein, is referred to herein as an *** Aircraft. 
  

	3.	***. 

 The *** of Special MAX9 Aircraft which can be *** into *** is specified in
Attachment 1 to this Letter Agreement. 

  

					
	
UAL-PA-3776-LA-1606848
	 		  	SA-7 
	***	  	LA Page 1
	BOEING PROPRIETARY

			
	

	  	

  

	4.	Definitive Agreement. 

 If Customer agrees with the *** in the *** Confirmation, then the
parties will sign a definitive agreement to incorporate the *** for each *** Aircraft (Supplemental Agreement) within *** of the *** Confirmation. The Supplemental Agreement will include the provisions of the Purchase Agreement as modified to
reflect the provisions of this Letter Agreement. In the event the parties *** a Supplemental Agreement within *** following *** Confirmation, either party may *** of a Special MAX9 Aircraft by giving written notice to the other within ***. If
Customer and Boeing *** Supplemental Agreement, then the delivery month of such Special MAX9 Aircraft is *** specified in the *** Confirmation. 
  

	5.	BFE. 

 The BFE *** dates will *** to support the scheduled delivery month of any
applicable *** Aircraft. 
  

	6.	Assignment. 

 Except as provided in Letter Agreement No.
UAL-PA-03776-LA-1208238, 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. 
  

	7.	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-03776-LA-1208234. 
 Very truly yours, 

 

			
	THE BOEING COMPANY
		
	By:	 	 Irma L. Kreuger

		
	Its:	 	
Attorney-In-Fact

  

					
	
UAL-PA-3776-LA-1606848
	 		  	SA-7 
	***                	  	LA Page 2
	BOEING PROPRIETARY

			
	

	  	

  

			
	ACCEPTED AND AGREED TO this
		
	Date:	 	 December 27, 2016

	
	UNITED AIRLINES, INC.
		
	By:	 	 Gerald Laderman

		
	Its:	 	Senior Vice President Finance,
		 	         Procurement and Treasurer

  

					
	
UAL-PA-3776-LA-1606848
	 		  	SA-7 
	***	  	LA Page 3
	BOEING PROPRIETARY

 Attachment 1: *** Notice Due Date for ***Special MAX9 Aircraft 

 

							
	 ***
	 	 Annual Limitation

Specifics
	 	 ***

Delivery Month
	 	 *** Due Date

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

  

					
	 Attachment 1 to UAL-PA-3776-LA-1606848
	  	SA- 7 
	***	 		  	Attachment 1, Page 1
	BOEING PROPRIETARY

					
	

	  		  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207

	 	  	 	  	 

  

 UAL-LA-1604287 

United Airlines, Inc. 
 233 South Wacker Drive 

Chicago, Illinois 60606 
  

	Subject:	  Certain *** (Letter Agreement) 

  

			
	References:	 	 (1)    Aircraft General Terms Agreement between The Boeing Company
(Boeing) and United Airlines, Inc. (Customer) identified as AGTA-UAL (AGTA);

		
		 	 (2)    Purchase Agreement No. 3776 between the parties relating to Model 737-9 aircraft, including Letter Agreement UAL-PA-03776-LA- 1207637 entitled “*** Matters” (MAX PDP
Letter);

		
		 	 (3)    Purchase Agreement No. 3784 between the parties relating to Model
737NG aircraft, including Letter Agreement UAL-PA-03784-LA-1208155R2 entitled “*** Matters: 737-*** and 2016 737NG
Aircraft” (NG PDP Letter);

		
		 	 (4)    Purchase Agreement No. 3860 between the parties relating to Model
787 aircraft, including Section 3 of Letter Agreement UAL-PA-03860- LA-1209413R1
entitled “Special Matters” (787 PDP Matters Section of the Special Matters Letter); and

		
		 	 (5)    Purchase Agreement No. 04308 between the parties relating to Model
777-300ER aircraft, including Letter Agreement UAL-PA- 04308-LA-1404408R1 entitled “*** Matters” (777 PDP Letter), (references (2) through
(5) are referred to herein as the Purchase Agreement or Purchase Agreements as the context requires).

 Ladies and gentlemen: 

All terms used but not defined in this Letter Agreement shall have the same meaning as in the corresponding purchase agreement or AGTA, as
applicable. 

  

					
	 UAL-LA-1604287
	 		  	
	Certain ***	  	LA Page 1

			
	

	  	

  

	 	1.	*** Matter ***. 

 Notwithstanding the *** Schedule contained in Table 1 of each of the
Purchase Agreements or the terms set forth in the 777 PDP Letter, the 787 PDP Matters Section of the Special Matters Letter, the NG PDP Letter and the MAX PDP Letter (collectively, the UAL PDP Letters or UAL PDP Letter as the context
requires), Customer *** for any Aircraft on order as of the date of signing the applicable Purchase Agreement, and for any *** Aircraft in accordance with the terms of the applicable UAL PDP Letter; provided, however, that Customer shall retain the
right to either (a) *** set forth in any of the UAL PDP Letters, and to the extent that Customer *** then Customer’s *** shall be *** or (b) *** provided that (1) Boeing *** to such *** and (2) such ***. 

 

	 	2.	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-04308-LA-1404407 of the 777 Purchase Agreement entitled “Privileged and Confidential Matters”. 
  

			
	Very truly yours,
	
	THE BOEING COMPANY
		
	By:	 	 /s/ Irma L. Krueger

		
	Its:	 	
Attorney-In-Fact

  

					
	 UAL-LA-1604287
	 		  	
	Certain ***	  	LA Page 2

			
	

	  	

  

 AGREED AND ACCEPTED this 27th day of December of
2016 
 UNITED AIRLINES, INC. 
  

	
	 /s/ Gerald Laderman

	Signature
	
	 Gerald Laderman

	Printed Name
	
	Senior Vice President Finance,
	         Procurement and Treasurer

	Title

  

					
	 UAL-LA-1604287
	 		  	
	Certain ***	  	LA Page 3

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