Exhibit



Exhibit 10.166
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. 10
to
Purchase Agreement No. 3860
between
The Boeing Company
and
United Airlines, Inc.
Relating to Boeing Model 787 Aircraft


	
			
	UAL-PA-3860
	SA-10
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	BOEING / UNITED AIRLINES, INC. PROPRIETARY



         







THIS SUPPLEMENTAL AGREEMENT No. 10 (SA-10), entered into as of November 1, 2018, by and between THE BOEING COMPANY (Boeing) and UNITED AIRLINES, INC. (Customer); 
WHEREAS, the parties hereto entered into Purchase Agreement No. 3860 dated September 27, 2012, as amended and supplemented (Purchase Agreement), relating to the purchase and sale of Boeing model 787 aircraft (Aircraft).  This Supplemental Agreement is an amendment to the Purchase Agreement; 
The parties to the Purchase Agreement have agreed to *** of *** 787‐*** Aircraft; 
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-10”).
		
	2.
	Tables.


Table 1A entitled “787-*** Aircraft with GENX-1B*** Engines Delivery, Description, Price and ***” is deleted in its entirety and replaced with the attached similarly titled “Table 1A” (identified by “SA-10”) to reflect *** of *** 787-*** Aircraft . 
		
	3.
	Miscellaneous. 


3.1.    The parties mutually agree that the terms of Letter Agreement UAL-PA-03860-LA-1802900 entitled “*** Rights for Certain 787 Aircraft” have expired.
3.2.    Boeing and Customer agree that *** under this Supplemental Agreement No. 10 and shall be due no later than *** days after execution of this SA-10. 
The Purchase 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.


	
			
	UAL-PA-3860
	SA-10
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	BOEING / UNITED AIRLINES, INC. PROPRIETARY



         







EXECUTED IN DUPLICATE as of the day and year first written above.
	
			
	THE BOEING COMPANY
	 
	UNITED AIRLINES, INC.

	/s/ Irma L. Krueger
	 
	/s/ Gerald Laderman

	Signature
	 
	Signature

	 
	 
	 

	Irma L. Krueger
	 
	Gerald Laderman

	Printed Name
	 
	Printed Name

	 
	 
	 

	

 
Attorney-in-Fact
	 
	

Executive Vice President and  
Chief Financial Officer

	Title
	 
	Title




 


	
			
	UAL-PA-3860
	SA-10
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	BOEING / UNITED AIRLINES, INC. PROPRIETARY



         






TABLE OF CONTENTS
	
			
	ARTICLES
	SA NUMBER

	Article 1.
	Quantity, Model and Description
	SA-1

	Article 2.
	Delivery Schedule
	SA-1

	Article 3.
	Price
	SA-1

	Article 4.
	Payment
	SA-1

	Article 5.
	Additional Terms
	SA-1

	TABLE
	 

	1
	787-*** Aircraft Delivery, Description, Price and ***
	SA-7

	1A.
	787-*** with GENX-1B*** Engines Aircraft Information Table
	SA-10

	EXHIBITS
	 

	 
	 
	 

	A2*
	787-*** Aircraft Configuration
	SA-9

	A3.
	787-*** Aircraft Configuration
	SA-9

	B.
	Aircraft Delivery Requirements and Responsibilities
	 

	*  - Note:  There is no Exhibit A1 in this Purchase Agreement
	 

	SUPPLEMENTAL EXHIBITS
	 

	AE1.
	*** Adjustment/Airframe and *** Features
	 

	BFE1.
	BFE Variables for the 787-*** Aircraft
	SA-7

	CS1.
	Customer Support Document
	 

	EE1.
	Engine ***/Engine Warranty ***
	 

	SLP1.
	Service Life Policy Components
	 








	
			
	P.A. 3860
	TABLE OF CONTENTS, Page 1 of 4
	SA-10

	BOEING/UNITED AIRLINES, INC. PROPRIETARY



    






	
			
	TABLE OF CONTENTS, CONTINUED

	LETTER AGREEMENTS
	SA NUMBER

	UAL-PA-03860-LA-1209247
	787 e-Enabling
	 

	UAL-PA-03860-LA-1209264
	Open Configuration Matters 
Completed:  No longer applicable
	SA-9

	UAL-PA-03860-LA-1209409
	Spare Parts Initial Provisioning
	 

	UAL-PA-03860-LA-1209410
	Special Matters Relating to COTS Software and End User License Agreements
	 

	UAL-PA-03860-LA-1209411
	Special Terms – Seats and In-flight Entertainment
	 

	UAL-PA-03860-LA-1209417
	Model 787 Post-Delivery Software & Data Loading
	 

	CONFIDENTIAL LETTER AGREEMENTS
	 

	UAL-PA-03860-LA-1209236R1
	Model ***
	SA-1

	 
	Attachment A, 787-*** Airframe Pricing of *** Aircraft with General Electric GEnx-1B***
	SA-1

	 
	Attachment B, 787-*** with General Electric GEnx-1B***
	SA-1

	 
	Attachment C, 787-***with General Electric GEnx-1B***
	SA-1

	UAL-PA-03860-LA-1209412
	Spare Parts Commitment
	 

	UAL-PA-03860-LA-1209413R3
	Special Matters
	SA-9

	UAL-PA-03860-LA-1209413A1R3
	Special Matters – Amendment 1
	SA-7

	UAL-PA-03860-LA-1209414
	Other Special Matters
	 

	UAL-PA-03860-LA-1209413A1
	Other Special Matters - Amendment  1
	SA-1

	UAL-PA-03860-LA-1209416R1
	Promotional Support
	SA-2

	UAL-PA-03860-LA-1209430
	***
	 

	UAL-PA-03860-LA-1209429
	***
	 






	
			
	P.A. 3860
	TABLE OF CONTENTS, Page 2 of 4
	SA-10

	BOEING/UNITED AIRLINES, INC. PROPRIETARY



    





	
			
	TABLE OF CONTENTS, CONTINUED

	CONFIDENTIAL LETTER AGREEMENTS, continued
	SA NUMBER

	6-1162-ELP-0794
	*** Program- ***
	 

	6-1162-ELP-0795
	*** Program- ***
	 

	UAL-PA-03860-LA-1301368
	*** (787-***)
	SA-1

	UAL-PA-03860-LA-1301373
	787-*** Aircraft Open Configuration and Other Matters
	SA-1

	UAL-PA-03860-LA-1301375R1
	Provisions Relating to Customer’s *** for 787‐*** Aircraft
	SA-7

	UAL-PA-03860-LA-1301377
	787-***
	SA-1

	UAL-PA-03860-LA-1301377A1
	787- *** – Amendment 1
	SA-4

	UAL-PA-03860-LA-1301380
	787-*** Program Launch
	SA-1

	UAL-PA-03860-LA-1500017
	***
	SA-4

	UAL-PA-03860-LA-1500059
	Installation of Cabin Systems Equipment
	SA-4

	UAL-PA-03860-LA-1703319
	Privileged and Confidential Matters
	SA-8

	UAL-PA-03860-LA-1802899
	Assignment Matters
	SA-9

	UAL-PA-03860-LA-1802900
	*** Rights for Certain 787 Aircraft
	SA-9








	
			
	P.A. 3860
	TABLE OF CONTENTS, Page 3 of 4
	SA-10

	BOEING/UNITED AIRLINES, INC. PROPRIETARY



    






	
		
	SUPPLEMENTAL AGREEMENTS
	DATED AS OF

	Supplemental Agreement No. 1 . . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . June 17, 2013

	Supplemental Agreement No. 2 . . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . December 16, 2013

	Supplemental Agreement No. 3 . . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . July 22, 2014

	Supplemental Agreement No. 4 . . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . January 14, 2015

	Supplemental Agreement No. 5 . . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . May 12, 2015

	Supplemental Agreement No. 6 . . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . December 31, 2015

	Supplemental Agreement No. 7 . . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . March 7, 2016

	Supplemental Agreement No. 8 . . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . June 7, 2017

	Supplemental Agreement No. 9 . . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . May 31, 2018

	Supplemental Agreement No. 10 . . . . . . . . . . . .
	 . . . . . . . . . . . . . . . . . . . November 1, 2018










	
			
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	TABLE OF CONTENTS, Page 4 of 4
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	BOEING/UNITED AIRLINES, INC. PROPRIETARY



    





Table 1A to Purchase Agreement No. 3860
787-*** Aircraft with GENX-1B*** Engines Delivery, Description, Price and ***
(787-***/GE/***)



	
												
	Airframe Model/MTOW:
	787-***
	*** pounds
	#
	 
	Detail Specification:
	 
	***

	Engine Model/Thrust:
	GENX-1B***1
	*** pounds
	 
	 
	Airframe Price Base Year/*** Formula:
	 
	***
	***

	Airframe Price:
	 
	$***
	 
	 
	Engine Price Base Year/*** Formula:
	 
	***
	***

	*** Features:
	 
	$***
	 
	 
	Airframe *** Data:
	 
	 
	 

	Sub-Total of Airframe and Features:
	 
	$***
	 
	 
	Base Year Index (ECI):
	 
	***

	Engine Price (Per Aircraft) :
	 
	$***
	1 
	 
	Base Year Index (CPI):
	 
	***

	Aircraft Basic Price (Excluding BFE/SPE):
	 
	$***
	 
	 
	Engine *** Data:
	 
	 
	 

	Buyer Furnished Equipment (BFE) Estimate:
	 
	$***
	 
	 
	Base Year Index (ECI):
	 
	***

	In-Flight Entertainment (IFE) Estimate:
	 
	$***
	 
	 
	Base Year Index (CPI):
	 
	***

	 
	 
	 
	 
	 
	 
	 
	 
	 
	 
	 
	 

	# of Aircraft
	Delivery Date
	Number of
Aircraft
	***
Factor
(Airframe)
	***
Factor
(Engine)
	See footnote for *** forecast being used
	Serial
Number +
	*** Estimate ***
Base Price Per
A/P
	*** Per Aircraft (Amts. Due/*** Prior to Delivery):

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

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

	***
	***
	***
	***
	***
	***
	***
	$***
	$***
	$***
	$***
	$***

	 
	Total:
	***
	 
	 
	 
	 
	 
	 
	 
	 
	 

	 
	 
	 
	 
	 
	 
	 
	 
	 
	 
	 
	 

	 
	1 Pursuant to GE agreement:  GEnx-1B***.
	 
	 
	 

	 
	 * ** *** Factors ***
	 
	 
	 

	 
	#  ***.  Aircraft are eligible for the provisions of Letter Agreement UAL-PA-03860- LA-1301375R1 
      entitled "Provisions Relating to Customer's *** for 787-*** Aircaft"
	 
	 

	 
	 
	 
	 
	 
	 
	 
	 
	 
	 
	 
	 

	 
	+ Serial Numbers Identified are for informational purposes only and subject to change
	 
	 








	
			
	APR-111650
	BOEING / UNITED AIRLINES PROPRIETARY
	787-*** with GE Engines Table 1A (SA-10) Page 1