STC SA3943WE-D

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002

Part 4b of the Civil Air Regulations (For certification basis, see Type Certificate Data Sheet 4A25) Original Product Type Certificate Number :

4A25

Boeing

DC-8-61 Description of Type Design Change: Rework of High-Frequency Communications System to install single-sideband capability in accordance with Unite d Air Lines, DAS-1-WE, Drawing List No. 3943 dated May 16, 1980, or later FAA approved revisions.

Limitations and Conditions: The approval of this change in type design applies only to DC-8-61 aircraft. This approval should not be extended to other specific aircra ft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previ ously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. Th is determination should in clude 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 th is 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: May 12, 1980

Date of issuance: May 16, 1980

Date reissued: November 30, 2011

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

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