STC SA2707NM-D

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002

Part 25 of the Federal Aviation Regulations.

A16WE

Boeing

737-291 and 737-2A1 Description of Type Design Change: Installation of an ARINC Communications Addressing and Reporting System (ACARS) in accordance with Un ited Air Lines, DAS-1-WE, Approved Drawing List No. 2707, dated September 26, 1985, or later FAA approved revision.

Limitations and Conditions: The approval of this change in type design applies only to 737-291 and 737-2A1 aircraft. This approval does not extend to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. This determination should include consideration of significant changes in we ight distribution such as increase in the fixed disposable weight in the fuselage. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

Date of application: August 28, 1985

Date of issuance: September 26, 1985

Date reissued: November 30, 2011

( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff Los Angeles Aircraft Certification Office ( Title)

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