Exhibit 10.4

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 Number 03784

Between

The Boeing Company

and

United Airlines, Inc.

Relating to Boeing Model 737 Aircraft

THIS SUPPLEMENTAL AGREEMENT is entered into as of February 8, 2016 by and
between THE BOEING COMPANY (Boeing) and UNITED AIRLINES, INC. (Customer);

WHEREAS, the parties hereto entered into Purchase Agreement Number 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 *** as follows:

 

  (i) Boeing and Customer agree to *** aircraft to the Purchase Agreement as
identified in Figure 1 below.

 

Figure 1 Delivery Month ***

 

  (ii) Such firm *** aircraft incorporated into the Purchase Agreement shall be
defined as Firm 737-*** Aircraft.

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, Supplemental Exhibits, and Letter
Agreements:

1.1 The “Table of Contents” is deleted in its entirety and replaced with the
attached “Table of Contents” (denoted by “SA-10”).

1.2 Table 1C entitled “Aircraft Information Table” (identified by “SA-10”) is
added to the Purchase Agreement.

 

UAL-PA-03784

  SA-10   Page 1 BOEING / UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

Supplemental Agreement No. 10 to

Purchase Agreement PA-03784

 

1.3 Supplemental Exhibit BFE3 entitled “BFE Variables for Firm 737-*** Aircraft”
(identified by “SA-10”) is added to the Purchase Agreement.

1.4 Exhibit A-2 entitled “Exhibit A-2 Aircraft Configuration Firm 737-***
Aircraft” (identified by “SA-10”) is added to the Purchase Agreement.

1.5 Letter Agreement UAL-PA-03784-LA-1600041 titled “Special Matters – Firm
737-*** Aircraft” is added to the Purchase Agreement.

 

2. Revisions to the Purchase Agreement:

2.1 The following reference to “Table 1” in the Purchase Agreement and
associated exhibits, supplemental exhibits, and letter agreements to the
Purchase Agreement are now deemed to be replaced per Figure 2 as follows:

 

   Figure 2   

Document

  

Original Reference

  

Replacement Reference

Purchase Agreement Basic Articles   

Reference to “Table 1”

 

(i)        Opening Paragraph 1

 

(ii)       Article 2

 

(iii)      Article 3.1

 

(iv)      Article 5.1

   “Table 1A, Table 1B and Table 1C”

2.2 Boeing and Customer agree that Section 8 of Letter Agreement 6-1162-KKT-080
shall no longer apply to the Firm 737-*** Aircraft.

2.3 If Boeing or Customer determine that amendments described in Figure 2 of
this Supplemental Agreement No. 10 should be further amended, then Boeing and
Customer will work together for a mutually agreeable solution.

 

3. Miscellaneous:

3.1 For the avoidance of doubt, Boeing and Customer agree that the provisions of
Letter Agreement UAL-PA-03784-LA-1207881 apply to the Firm 737-*** Aircraft. The
parties acknowledge that all SPE suppliers have previously been selected by
Customer so that the provisions of Section 2.1 have already been satisfied by
Customer.

3.2 Boeing and Customer agree ***.

The rest of this page is left intentionally blank.

 

UAL-PA-03784

  SA-10   Page 2 BOEING / UNITED AIRLINES PROPRIETARY

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Supplemental Agreement No. 10 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 and acting Chief Financial Officer

   Title    Title   

 

UAL-PA-03784

  SA-10   Page 3 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-***    SA-8

1B.

   Aircraft Information Table – 2016 737NG Aircraft    SA-9

1C.

   Aircraft Information Table –Firm 737-*** Aircraft    SA-10

EXHIBITS

  

A.

   Aircraft Configuration – 737-***   

A1.

   Aircraft Configuration – 2016 737NG Aircraft    SA-9

A2.

   Aircraft Configuration – Firm 737-*** 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-*** Aircraft

   SA-1

BFE2.

  

BFE Variables for 2016 737NG Aircraft

   SA-9

BFE3.

  

BFE Variables for Firm 737-*** Aircraft

   SA-10

CS1.

  

Customer Support Variables

  

EE1.

  

Engine Escalation, Engine Warranty ***

  

SLP1.

  

Service Life Policy Components

  

 

P.A. 03874

  TABLE OF CONTENTS, Page 1 of 3   SA-10 BOEING/UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

TABLE OF CONTENTS, CONTINUED

 

     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 ***    SA-9 UAL-PA-03784-LA-1207879R3  
2016 737NG *** Aircraft    SA-9 UAL-PA-03784-LA-1207881   Seller Purchased
Equipment 737-***      Attachment AR1 to Letter Agreement
UAL-PA-03784-LA-1207881    SA-9 UAL-PA-03784-LA-1208155R2   *** Matters 737-***
and 2016 737NG Aircraft    SA-9 UAL-PA-03784-LA-1208156R1   *** for the 737NG
Aircraft    SA-9   Attachment A: ***    SA-9   Attachment B1: ***    SA-9  
Attachment B2: ***    SA-9 UAL-PA-03784-LA-1208172   ***   
UAL-PA-03784-LA-1208173   ***    SA-1 UAL-PA-03784-LA-1208169   737 Production
Adjustments    UAL-PA-03784-LA-1208938   Privileged and Confidential Matters   
UAL-PA-03784-LA-1208939   Aircraft Model ***    UAL-PA-03784-LA-1209115   ***   
UAL-PA-03784-LA-1300306   Aircraft Reschedule – January 2014 to February 2014   
SA-2 UAL-PA-03784-LA-1400240   Aircraft Rescheduling of ***    SA-5
UAL-PA-03784-LA-1504843   Open Matters – 2016 737NG Aircraft    SA-9
UAL-PA-03784-LA-1504844   Special Matters – 2016 737NG Aircraft    SA-9
UAL-PA-03784-LA-1600041   Special Matters – Firm 737-*** Aircraft    SA-10

 

P.A. 03874

  TABLE OF CONTENTS, Page 2 of 3   SA-10 BOEING/UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

TABLE OF CONTENTS

 

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   

 

P.A. 03874

  TABLE OF CONTENTS, Page 3 of 3   SA-10 BOEING/UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

Table 1C To

Purchase Agreement No. PA-03784

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

 

Airframe Model/MTOW:    737-***      *** 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:      $***                    

 

 

             Sub-Total of Airframe and Features:      $***     

Airframe Escalation Data:

         Engine Price (Per Aircraft):      $***     

Base Year Index (ECI):

      ***         

 

 

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

Base Year Index (CPI):

      ***         

 

 

             Buyer Furnished Equipment (BFE) Estimate:      $***              
Seller Purchased Equipment (SPE) Estimate:      $***               Deposit per
Aircraft:      $*** *            

 

Delivery

Date

  

Number of

Aircraft

  

Escalation

Factor

(Airframe)

   Escalation Estimate
*** Base
Price Per A/P  

*** Per Aircraft (Amts. Due/*** Prior to Delivery):

          

***

***

  

***

***

  

***

***

  

***

***

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

 

* – At effective date of SA-10, ***

 

   

SA-10

UAL-PA-03784 83313-1F.TXT

  BOEING / UNITED AIRLINES PROPRIETARY   Page 1

--------------------------------------------------------------------------------

AIRCRAFT CONFIGURATION

between

THE BOEING COMPANY

and

UNITED AIRLINES, INC.

Exhibit A-2 to Purchase Agreement Number 3784

For the Firm 737-*** Aircraft

 

PA-3784

  A-2   SA-10   BOEING/UNITED AIRLINES PROPRIETARY   Page1

--------------------------------------------------------------------------------

Exhibit A-2

737-*** AIRCRAFT CONFIGURATION

Dated May 26, 2015

relating to the Firm 737-*** Aircraft

The Detail Specification is Boeing document number ***, expected to be released
on or before ***. The Detail Specification provides further description of
Customer’s configuration set forth in this Exhibit A. Such Detail Specification
will be comprised of *** to incorporate *** listed below, including ***. As soon
as practicable, Boeing will furnish to Customer copies of the Detail
Specification, which copies will reflect such ***. The Aircraft Basic Price
reflects and includes all effects of such ***, except such Aircraft Basic Price
does not include the price effects of any Buyer Furnished Equipment or Seller
Purchased Equipment.

 

PA-3784

  A-2   SA-10 Page 2 BOEING/UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

CR

  

Title

  

*** $ Price

Per Firm 737-***

Aircraft

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

 

PA-3784

  A-2   SA-10 Page 3 BOEING/UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

CR

  

Title

  

*** $ Price

Per Firm 737-***

Aircraft

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

 

PA-3784

  A-2   SA-10 Page 4 BOEING/UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

CR

  

Title

  

*** $ Price
Per Firm 737-***

Aircraft

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

 

PA-3784

  A-2   SA-10     Page 5 BOEING/UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

CR

  

Title

  

*** $ Price
Per Firm 737-***

Aircraft

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

 

PA-3784

  A-2   SA-10     Page 6 BOEING/UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

CR

  

Title

  

*** $ Price
Per Firm 737-***

Aircraft

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

 

PA-3784

  A-2   SA-10     Page 7 BOEING/UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

CR

  

Title

  

*** $ Price
Per Firm 737-***

Aircraft

***    ***    *** ***    ***    *** ***    ***    *** ***    ***    *** ***   
***    *** ***    ***    *** ***    ***    *** ***    ***    *** ***    ***   
*** ***    ***    *** ***    ***    *** ***    ***    *** ***    ***    *** ***
   ***    *** ***    TOTAL:    ***

 

PA-3784

  A-2   SA-10     Page 8 BOEING/UNITED AIRLINES PROPRIETARY

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BUYER FURNISHED EQUIPMENT VARIABLES

between

THE BOEING COMPANY

and

UNITED AIRLINES (UAL)

Supplemental Exhibit BFE3

to Purchase Agreement Number PA 03784

Relating to Firm 737-*** Aircraft

 

UAL-PA-03784-BFE3

  SA-10   Page 1 BOEING / UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

BUYER FURNISHED EQUIPMENT VARIABLES

relating to

Firm 737-*** Aircraft

This Supplemental Exhibit BFE3 contains supplier selection dates, on-dock dates
and other requirements applicable to the Firm 737-*** Aircraft.

 

1. Supplier Selection.

Customer has previously selected and notified Boeing of the suppliers and part
numbers of its BFE items.

 

2. On-dock Dates and Other Information.

On or before *** to *** of the Firm 737-*** Aircraft, 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 for the Firm 737-*** Aircraft are set
forth in Attachment A.

 

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-03784-BFE3

  SA-10   Page 2 BOEING / UNITED AIRLINES PROPRIETARY

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

 

***

 

***

 

***

 

***

 

***

 

***

 

***

 

***

 

***

 

***

 

***

 

***

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

Preliminary BFE On-Dock Dates for the Firm 737-*** Aircraft

 

UAL-PA-03784-BFE3

  SA-10   Attachment A, Page 1 BOEING / UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

LOGO [g116267ex104logo.jpg]

  

The Boeing Company    

P.O. Box 3707                

Seattle, WA 98124-2207

 

 

UAL-PA-03784-LA-1600041

United Airlines, Inc.

233 South Wacker Drive

Chicago, Illinois 60606

 

Subject:

   Special Matters – Firm 737-*** Aircraft, as defined in Supplemental Agreement
No. 10 to the Purchase Agreement

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-***.

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

1.2. ***.

In consideration of Customer’s purchase of Firm 737-*** Aircraft, Boeing shall
*** at the time of delivery of each Firm 737-*** Aircraft a ***. The *** amount
is *** the *** at time of delivery. Such *** may be used by *** for the ***of
Boeing *** and *** or ***to the balance due 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 Firm 737-***
Aircraft with ***, Boeing will *** to Customer a *** at delivery of each Firm
737-*** Aircraft in the *** of the respective Firm 737-*** 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. ***.

 

UAL-PA-03784-LA-1600041

    Page 1 Special Matters – Firm 737-*** Aircraft P.A. No. 3784, SA 10   BOEING
/ UNITED AIRLINES PROPRIETARY

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LOGO [g116267ex104logo.jpg]

 

1.4. Applicability of ***.

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

 

2. *** Schedule.

Notwithstanding the *** of the Agreement, Customer ***.

 

3. *** Rights.

3.1. Customer agrees that if there is *** under (i) the Purchase Agreement ***,
then Boeing may, with *** calendar days written notice *** under the Purchase
Agreement, ***.

3.2. In the event Boeing *** Customer will make all such *** payments to Boeing
by unconditional wire transfer of immediately available funds in United States
Dollars in a bank account to the United States designated by Boeing.

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 ***.

 

4. ***.

4.1. *** Firm 737-*** Aircraft. Customer agrees *** on *** pursuant to Article 2
of this Letter Agreement ***.)

4.2. Delivery *** Impact on *** Calculations. If the delivery of any Aircraft is
*** due to either an excusable or a non-excusable ***, then interest on the ***
in respect of 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 3.1 of
this Letter Agreement or on the delivery date of the Aircraft, whichever comes
first.

4.3. Boeing ***. 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

 

UAL-PA-03784-LA-1600041

    Page 2 Special Matters – Firm 737-*** Aircraft P.A. No. 3784, SA 10   BOEING
/ UNITED AIRLINES PROPRIETARY

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LOGO [g116267ex104logo.jpg]

 

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 for
which *** have been ***. The invoice will also include *** on *** with respect
to other aircraft in other purchase agreements between Customer and Boeing.

 

5. Assignment of ***.

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

 

6. Confidentiality.

Customer and Boeing understand that certain commercial and financial information
contained in this Letter Agreement are considered by Boeing and Customer as
confidential and are subject to the terms and conditions set forth in Letter
Agreement No. UAL-PA-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 – Firm 737-*** Aircraft P.A. No. 3784, SA 10   BOEING
/ UNITED AIRLINES PROPRIETARY

--------------------------------------------------------------------------------

LOGO [g116267ex104logo.jpg]

 

ACCEPTED AND AGREED TO this

Date:

 

February 8, 2016

UNITED AIRLINES, INC.

By:

 

/s/ Gerald Laderman

Its:

  Senior Vice President - Finance and acting Chief Financial Officer

 

UAL-PA-03784-LA-1600041

    Page 4 Special Matters – Firm 737-*** Aircraft P.A. No. 3784, SA 10   BOEING
/ UNITED AIRLINES PROPRIETARY

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Attachment A to Letter Agreement No. UAL-PA-03784-LA-1600041

*** Schedule For the Firm 737-*** Aircraft

 

***

      ***

***

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

 

Attachment A to UAL-PA-03784-LA-1600041

  Att. A, Page 1 Special Matters – Firm 737-*** Aircraft   P.A. No. 3784, SA-10
BOEING / UNITED AIRLINES PROPRIETARY