What it approves
Installation of United Air Lines NLG orifice support tube assembly P/N 6F13548-501 and -502 per FAA Approved United Air Lines Drawing No. 6F13548, Rev. "B" dated January 10, 1977, or later FAA approved revisions as an equivalent replacement for McDonnell Douglas NLG orifice support tube P/N 5598184 and 5717019.
What the certificate says
From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.
This Certificate issued to United Air Lines, Inc.
600 Jefferson Street Houston, Texas 77002
Part 4b of the Civil Air Regulations.
4A25
Boeing
DC-8-21, -31, -33, -51, -52, -61, -62, DC-8F-54 Description of Type Design Change : Installation of United Air Lines NLG orifice support tube assembly P/N 6F13548-501 and -502 per FAA Approved United Air Lines Drawing No. 6F13548, Rev. “B” dated January 10, 1977, or later FAA approved revisions as an equivalent replacement for McDonnell Douglas NLG orifice support tube P/N 5598184 and 5717019.
Limitations and Conditions: The approval of change in type design applies basically to the list model DC-8 aircraft only. Installation of the 6F13548-501 and -502 orifice support tube assembly is considered as an equivalent to the McDonnell Dougl as P/N 5598184-503 and 5717019-503 orifice support tube specified in paragraph (b) of A.D. 75-17-31, but with a life limitation of 25,000 landings. If the holder agrees to permit another person to use this certificat e 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: September 29, 1975
Date of issuance: October 4, 1977
Date reissued: November 30, 2011
( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office ( Title)
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