EX-10.2



 Exhibit 10.2 

Supplemental Agreement No. 04 

to 
 Purchase Agreement Number
PA-03784 
 (the Agreement) 

Between 
 The Boeing Company 

and 
 United Airlines, Inc. 

Relating to Boeing Model 737-900ER Aircraft 

THIS SUPPLEMENTAL AGREEMENT is entered into as of September 11, 2013 by and between THE BOEING COMPANY (Boeing) and UNITED
AIRLINES, INC. (formerly known as Continental Airlines, Inc. and successor by merger to United Air Lines, Inc.) (Customer); 

WHEREAS, the parties hereto entered into Purchase Agreement No. 3784 dated July 12, 2012 (Purchase Agreement), as amended and
supplemented, relating to the purchase and sale of Boeing Model 737 aircraft (Aircraft). This Supplemental Agreement is an amendment to the Purchase Agreement; 

WHEREAS, Boeing and Customer agree to revise the delivery month for *** Aircraft, as follows: 

 

					
	 Original Delivery Month
	  	 New Delivery Month
	  	 Serial Number

	 ***
	  	***	  	***

 WHEREAS, Boeing and Customer agree to revise the delivery month for *** Option Aircraft, as follows: 

 

			
	 Original Delivery Month
	  	 New Delivery Month

	***	  	***

 WHEREAS Boeing and Customer agree that for those Option Aircraft scheduled to deliver
in ***, as of the date of this Supplemental Agreement ( *** ), the option exercise lead time will be *** months *** . 
 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. 
  

					
	 P.A. 03784
 UAL
	  	SA 4-1	  	









 Supplemental Agreement No. 04 to 

Purchase Agreement PA-03784 
  

 WHEREAS Boeing and Customer agree that the *** schedule defined in Letter Agreement
UAL-PA-03784-LA-1208155 will be revised for the *** to *** prior to delivery until *** Aircraft delivery. *** prior to delivery. 
 NOW
THEREFORE, in consideration of the mutual covenants herein contained, the parties agree to amend the Agreement as follows: 
 1. Table of
Contents, Articles, Tables, Exhibits, and Letter Agreements: 
 1.1 Remove and replace, in its entirety, the “Table of
Contents”, with the “Table of Contents” attached hereto, to reflect the changes made by this Supplemental Agreement No. 04. 

1.2 Remove and replace, in its entirety, “Table 1” with the “Table 1” attached hereto to reflect the above revisions. 

1.3 Remove and replace, in its entirety, Letter Agreement UAL-PA-03784-LA-1207879R1, “Option Aircraft”, with the Letter Agreement
UAL-PA-03784-LA-1207879R2 attached hereto to reflect the above revisions. 
 1.4 Remove and replace, in its entirety, Letter Agreement
UAL-PA-03784-LA-1208155, “ *** Matters”, with the Letter Agreement UAL-PA-03784-LA-1208155R1 attached hereto to reflect the above revisions. 

The Agreement will be deemed to be supplemented to the extent herein provided as of the date hereof and as so supplemented will continue in
full force and effect. 
 [The remainder of this page is intentionally blank. Signature page follows.] 

  
 P.A. 03784 

	 UAL 
 SA 4-2 











 Supplemental Agreement No. 04 to 

Purchase Agreement PA-03784 
  

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

 

							
	THE BOEING COMPANY	 		 		 	UNITED AIRLINES, INC.
				
	/s/ ***	 		 		 	/s/ Gerald Laderman
	 Signature
	 		 		 	Signature
				
	Attorney-in-Fact	 		 		 	Senior Vice President – Finance and Treasurer
	 Title
	 		 		 	Title


  
 P.A. 03784 

	 UAL 
 SA 4-3 










 TABLE OF CONTENTS 

 

							
	 	  	SA Number	 
	 ARTICLES
	  	 	 
	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	  	 	04	  
		
	 EXHIBIT
	  	 	 
	A.	  	Aircraft Configuration	  			
	B.	  	Aircraft Delivery Requirements and Responsibilities	  			
		
	 SUPPLEMENTAL EXHIBITS
	  	 	 
	AE1.	  	Escalation Adjustment/Airframe and Optional Features	  			
	BFE1.	  	BFE Variables	  			
	CS1.	  	Customer Support Variables	  			
	EE1.	  	Engine Escalation, Engine Warranty ***	  			
	SLP1.	  	Service Life Policy Components	  			


  

			
	UAL-PA-03784	  	SA-4
		  	Page 1

 BOEING / UNITED AIR LINES, INC. PROPRIETARY 









							
	 LETTER AGREEMENTS
	  	 TITLE
	  	 SA Number
	 
	 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
	  	Option Aircraft	  	 	04	  
		  	Attachment A	  	 	04	  
	 UAL-PA-03784-LA-1207881
	  	Seller Purchased Equipment	  			
	 UAL-PA-03784-LA-1208155R1
	  	*** Matters	  	 	04	  
	 UAL-PA-03784-LA-1208156
	  	***	  			
	 UAL-PA-03784-LA-1208172
	  	***	  			
	 UAL-PA-03784-LA-1208173
	  	***	  			
	 UAL-PA-03784-LA-1207869
	  	737 Production Adjustments	  			
	 UAL-PA-03784-LA-1208938
	  	Privileged and Confidential Matters	  			
	 UAL-PA-03784-LA-1209039
	  	Aircraft Model Substitution	  			
	 UAL-PA-03784-LA-1209115
	  	***	  			
	 UAL-PA-03784-LA-1300306
	  	Aircraft Reschedule – ***	  	 	02	  


  

			
	UAL-PA-03784	  	SA-4
		  	Page 2

 BOEING / UNITED AIR LINES, INC. PROPRIETARY 









			
	 SUPPLEMENTAL AGREEMENTS

DATED AS OF
	  	
		
	 Supplemental Agreement No. 01
	  	September 27, 2012
		
	 Supplemental Agreement No. 02
	  	March 1, 2013
		
	 Supplemental Agreement No. 03
	  	June 27, 2013
		
	 Supplemental Agreement No. 04
	  	September 11, 2013


  

			
	UAL-PA-03784	  	SA-4
		  	Page 3

 BOEING / UNITED AIR LINES, INC. PROPRIETARY 








 Table 1 To 

Purchase Agreement No. 03784 

737-900ER Aircraft Delivery, Description, Price and Advance Payments 

 



									
	 Airframe Model/MTOW:
	  	 	737-900ER	  	  	 	*** pounds	  
	 Engine Model/Thrust:
	  	 	CFM56-7B***	  	  	 	*** pounds	  
	 Airframe Price:
	  				  	$	 ***	  
	 Optional Features:
	  				  	$	 ***	  
		  				  	  
	  
	 
	 Sub-Total of Airframe and Features:
	   
	  	$	 ***	  
	 Engine Price (Per Aircraft):
	   
	  	$	 ***	  
	 Aircraft Basic Price (Excluding BFE/SPE):
	   
	  	$	 ***	  
			  	  
	  
	 
	 Buyer Furnished Equipment (BFE) Estimate:
	    
	  	$	 ***	  
	 Seller Purchased Equipment (SPE) Estimate:
	    
	  	$	 ***	  
	 Deposit per Aircraft:
	   
	  	$	 ***	  





									
	Detail Specification:	  				  	 	***	  
	Airframe Price Base Year/Escalation Formula:	  	 	***	  	  	 	***	  
	Engine Price Base Year/Escalation Formula:	  	 	***	  	  	 	***	  
		  				  			
	Airframe Escalation Data:	  				  			
	Base Year Index (ECI):	  	 	***	  	  			
	Base Year Index (CPI):	  	 	***	  	  			
		  				  			

 
 

  

																																					
	Delivery
Date	  	Number of
Aircraft	 	  	Escalation
Factor
(Airframe)	 	  	Serial
Number	 	  	Escalation
Forecast	 	  	Escalation Estimate	 	  	Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery):	 
	  	  	  	  	  	Adv Payment Base
Price Per A/P	 	  	***
***	 	  	***
***	 	  	***
***	 	  	***
***	 
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  

  

	 Boeing / United Air Lines, Inc. Proprietary 
	 SA-4, Page 1 











 Table 1 To 

Purchase Agreement No. 03784 

737-900ER Aircraft Delivery, Description, Price and Advance Payments 

 


																																					
	Delivery
Date	  	Number of
Aircraft	 	  	Escalation
Factor
(Airframe)	 	  	Serial
Number	 	  	Escalation
Forecast	 	  	Escalation Estimate	 	  	Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery):	 
	  	  	  	  	  	Adv Payment Base
Price Per A/P	 	  	***
***	 	  	***
***	 	  	***
***	 	  	***
***	 
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  


  

					
		  	Boeing / United Air Lines, Inc. Proprietary	  	SA-4, Page 2










 Table 1 To 

Purchase Agreement No. 03784 

737-900ER Aircraft Delivery, Description, Price and Advance Payments 

 


																																					
	Delivery
Date	  	Number of
Aircraft	 	  	Escalation
Factor
(Airframe)	 	  	Serial
Number	 	  	Escalation
Forecast	 	  	Escalation Estimate	 	  	Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery):	 
	  	  	  	  	  	Adv Payment Base
Price Per A/P	 	  	***
***	 	  	***
***	 	  	***
***	 	  	***
***	 
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	***	  	 	***	  	  	 	***	  	  	 	***	  	  	 	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  	  	$	***	  
	Total:	  	 	64	  	  				  				  				  				  				  				  				  			

  

	*	*** Escalation Factors *** 


	**	*** Escalation Factors *** 


	***	*** Escalation Factor *** 


  

					
		  	Boeing / United Air Lines, Inc. Proprietary	  	SA-4, Page 3










					
	



	  		  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207


 UAL-PA-03784-LA-1207879R2 

United Airlines, Inc. 
 233 South Wacker Drive 

Chicago, IL 60606 
  

			
	Subject:	  	Option Aircraft
		
	Reference:	  	Purchase Agreement No. PA-03784 (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc. (Customer) relating to Model 737-900ER 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-1207879R1 dated March 1,
2013. 
 1. Right to Purchase Option 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 option to purchase additional Model 737-900ER aircraft as option aircraft (Option Aircraft). 

2. Delivery. 
 The number of aircraft and
delivery months are listed in the Attachment A to this Letter Agreement. 
 3. Configuration. 

3.1 Subject to the provisions of Article 3.2, below, the configuration for the Option Aircraft will be the Detail Specification for model
737-900ER 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 Option Exercise Date (as defined below) and the signing of the Definitive Agreement, (ii) changes required to obtain required regulatory certificates, and (iii) other changes as mutually agreed. 

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

			
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 4. Price. 

4.1 The Airframe Price and Optional Features Prices for each of the Option Aircraft are identified in Attachment A to this Letter
Agreement. The *** 
 4.2 The Airframe Price, Optional Features Prices, and Aircraft Basic Price for each of the Option Aircraft
shall be adjusted in accordance with the terms set forth in Article 2.1.5 (Escalation Adjustment) of the AGTA. 
 4.3 The
Advance Payment Base Price shall be developed in accordance with the terms of the Purchase Agreement and determined at the time of Definitive Agreement. 

5. Payment. 
 5.1 Customer will
pay a non-refundable option deposit to Boeing in the amount shown in Attachment A for each Option Aircraft (Option Deposit), on the date of execution of this Letter Agreement. If Customer exercises an option, the Option Deposit will be
credited against the first advance payment due. *** 
 5.2 Notwithstanding the amount shown in Attachment A, the Option Deposit will
be *** for each Option Aircraft. 
 5.3 Upon Customer’s exercise of an option to purchase Option Aircraft, advance payments will be
payable as specified in the Purchase Agreement. The remainder of the Aircraft Price for the Option Aircraft will be paid at the time of delivery. 

  

			
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 6. Option Exercise. 

6.1 Customer may exercise an option by giving written notice to Boeing on or before the date *** prior to the first day of the delivery
month listed in Attachment A (Option Exercise Date). 
 6.2 *** 

6.3 Notwithstanding paragraph 6.1 above, for the Option Aircraft scheduled to deliver in ***, as of the effective date of Supplemental
Agreement No. 4 to the Purchase Agreement, the Option Exercise Date will be the date *** prior to the first day of the delivery month listed in Attachment A. 

7. Definitive Agreement. 

Customer’s exercise of an option pursuant to Article 6 above will be a *** for the purchase of the exercised Option Aircraft. All terms
related to Customer’s Aircraft will apply *** to such exercised Option Aircraft. ***, Boeing will prepare an invoice for the applicable Advance Payments due *** the exercised Option Aircraft. 

  

			
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 8. 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. 
 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. 

Very truly yours, 
  

			
	THE BOEING COMPANY
		
	By 	 	/s/ ***
	Its	 	Attorney-in-Fact

  

			
	ACCEPTED AND AGREED TO this
	
	Date: September 11, 2013

  

			
	United Airlines, Inc.
		
	By 	 	/s/ Gerald Laderman
	Its	 	Senior Vice President – Finance and Treasurer


  

			
	P.A. No. 03784	  	SA-4
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 Attachment A to 

Letter Agreement UAL-PA-03784-LA-1207879 

737-900ER Option Aircraft Delivery, Description, Price and Advance Payments 

 


 



							
	 Airframe Model/MTOW:
	  	737-900ER	 	 	*** pounds	  
	 Engine Model/Thrust:
	  	CFM56-7B***	 	 	*** pounds	  


							
	 Airframe Price:
	  		  	$	*	** 
	 Optional Features:
	  		  	$	*	** 
	 Sub-Total of Airframe and Features:
	  	$	*	** 
	 Engine Price (Per Aircraft):
	  	$	*	** 
	 Aircraft Basic Price (Excluding BFE/SPE):
	  	$	*	** 
	 Buyer Furnished Equipment (BFE) Estimate:
	  	$	*	** 
	 Seller Purchased Equipment (SPE) Estimate:
	  	$	*	** 
	 Deposit per Aircraft:
	  	$	*	** 





									
	 Detail Specification:
	  				 	 	*	** 
	 Airframe Price Base Year/Escalation Formula:
	  	 	*	** 	 	 	*	** 
	 Engine Price Base Year/Escalation Formula:
	  	 	*	** 	 	 	*	** 
	 Airframe Escalation Data:
	  				 			
	 Base Year Index (ECI):
	  				 	 	*	** 
	 Base Year Index (CPI):
	  				 	 	*	** 

 
 

  

																																	
	 Delivery

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


  
 APR 60652 

	 UAL-PA-03784 
 Boeing / United Air Lines, Inc. Proprietary

	 SA-4 Page 1 











 Attachment A to 

Letter Agreement UAL-PA-03784-LA-1207879 

737-900ER Option Aircraft Delivery, Description, Price and Advance Payments 

 


																																	
	 Delivery

Date
	  	Number of
Aircraft	 	  	Escalation
Factor
(Airframe)	 	  	  
	  	  
	  	Escalation Estimate
Adv Payment Base
Price Per A/P	 	  	Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery):	 
	  	  	  	  	  	  	***
***	 	  	***
***	 	  	***
***	 	  	***
***	 
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 ***
	  	 	***	  	  	 	***	  	  		  		  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  	  	$	 ***	  
	 Total:
	  	 	46	  	  				  		  		  				  				  				  				  			


  
 APR 60652 

	 UAL-PA-03784 
 Boeing / United Air Lines, Inc. Proprietary

	 SA-4 Page 2 











 



 

									
		  		  		  		  	 The Boeing Company
 P.O. Box 3707

Seattle, WA 98124-2207


  

 UAL-PA-03784-LA-1208155R1 

United Airlines, Inc. 
 233 South Wacker Drive 

Chicago, IL 60606 
  

	Subject:	    *** Matters 

  

			
	Reference:	  	Purchase Agreement No. PA-03784 (Purchase Agreement) between The Boeing Company (Boeing) and United Airlines, Inc. (Customer) relating to Model 737-900ER 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-1207879R1 dated March 1,
2013. 
 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 *** 

  

			
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 1.2 *** 
  

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

 1.3 *** Option Aircraft. 

Upon exercise of each Option Aircraft scheduled to deliver in *** , as of the effective date of Supplemental Agreement No. 4 to the
Purchase Agreement, *** 
  

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

 2. *** 
 2.1 ***
will *** on the *** payment would have been due in accordance with Table 1 of the Purchase Agreement, *** delivery of the applicable Aircraft. The *** used to *** shall be the ***. The *** will be the *** on *** will ***. 

2.2 *** the *** for each Aircraft will be ***. 

  

			
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 2.3 *** Option Aircraft scheduled to deliver in *** prior to the scheduled delivery date
for such Aircraft. 
 3. *** Rights. 

3.1 Customer agrees that *** Customer *** that *** and *** are *** in *** to resolve. 

3.2 In the event Boeing seeks to *** pursuant to Article 3.1, absent instruction from Boeing to the contrary, Customer shall, *** the Purchase
Agreement as amended by this Letter Agreement. Customer will *** . 
 3.3 For all purposes of this Article 3, including without limitation,
notice, *** or any other application, *** . Boeing expressly reserves all of its rights and remedies under any agreement and applicable law. 

3.4 Notwithstanding Article 3.1, *** 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. 

  

			
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 BOEING / UNITED AIR LINES, INC. PROPRIETARY 









 



 
  

 Very truly yours, 
  

			
	THE BOEING COMPANY
		
	By	 	/s/ ***
	Its	 	Attorney-in-Fact
	
	ACCEPTED AND AGREED TO this
		
	Date:	 	September 11, 2013
	
	United Airlines, Inc.
		
	By	 	/s/ Gerald Laderman
	Its	 	 Senior Vice President – Finance and

Treasurer



  

			
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 BOEING / UNITED AIR LINES, INC. PROPRIETARY