STC SA2128WE

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002 Part 4b of the Civil Air Regulations.

4A25

Boeing

DC-8-61 Description of Type Design Change: RCA Model AVQ-30C Weather Radar System is installed in accordance with FAA Approved United Air Lines Report No. F-1375, in lieu of existing AVQ-10 System.

Limitations and Conditions: The approval of this change in type design applies basically to DC-8-61 model only. This approva l should not be extended to other specific airplanes of this model on which other previously approved m odifications are incorporated unless it is determined by the installer that the interrelations hip between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of the aircraft. This determination should include c onsideration of significant changes in weight distribution such as an increase in the fixed dis posable weight in the fuselage. If the holder agrees to permit another person to use this certif icate 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 20, 1969

Date of issuance: March 17, 1970

Date reissued: November 30, 2011

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

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