STC SA5917NM-D

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002

Part 25 of the Federal Aviation Regulations. See Type Certificate Data Sheet A20WE for Special Conditions Original Product Type Certificate Number :

A20WE

Boeing

747-100 Series Description of Type Design Change: Installation of Aircraft Communications Addressing and Reporting System (ACARS) for Flight-deck Data Communications in accordance with United Air Lines DAS-1-WE Approved Drawing List No. 5917 dated September 5, 1993, or later FAA approved revisions.

Limitations and Conditions: 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 cha nge and any of those other previ ously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. 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: April 23, 1993

Date of issuance: September 5, 1993

Date reissued: November 30, 2011

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

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