STC SA3578WE-D

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002

Part 4b of the Civil Air Regulations.

A3WE

Boeing

727-022, 727-222 Description of Type Design Change: Installation of ARINC Communications Addressing and Reporting System (ACARS) in accordance with United Air Lines, DAS-1WE, Approved Drawing List 3578, dated February 9, 1979, or later FAA approved revision.

Limitations and Conditions: The approval of this change in type design applies basically to 727-022 and 727-222 aircraft only. 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 weight distribution such as increase in the fixed disposable weight in the fuselage. If the holder agrees to permit another person to use this certificate 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: October 10, 1978

Date of issuance: October 10, 1978

Date reissued: November 30, 2011

Date amended: February 9, 1979, August 5, 1983

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

NOTE:

DO NOT DELETE THIS PAGE.

DO NOT ADD ANY DATA TO THIS PAGE.

THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.