78-01-10 AVIONS MARCEL DASSAULT-BREGUET AVIATION: Amendment 39- 3115. Applies to Model Falcon 10 airplanes, certificated in all categories.
Compliance is required as indicated, unless already accomplished.
To prevent the loss of engine fire extinguishing system capability as a result of cracking in the discharge lines, accomplish the following:
(a) Within 10 hours time in service after the effective date of this AD, comply with paragraphs (a)(1) through (a)(4) of this paragraph and thereafter continue to comply with paragraphs (a)(1),(a)(2), and (a)(3) at intervals not to exceed 300 hours time in service until paragraph (b) is met:
(1) Remove the engine fire extinguishing system lines, P/N's F10A791105 and F10A791115, and inspect for cracks using a dye penetrant method in accordance with paragraph 2C of Avions Marcel Dassault - Breguet Aviation Alert Service Bulletin F10-A-26- 002, AMD-BA F10-A-0141, dated April 4, 1977, or an FAA-approved equivalent (hereinafter referred to as "Alert Service Bulletin").
(2) If a crack is found in a line, replace the line with a line of the same part number or an FAA-approved equivalent that is found to be free of cracks. Mark cracked lines to identify them as unairworthy.
(3) Comply with paragraph 2D of the Alert Service Bulletin when reinstalling lines.
(4) Enlarge the diameter of the openings which permit passage of the fire extinguishing system lines through the fuselage skin between frames 29 and 30 in accordance with paragraph 2B of the Alert Service Bulletin.
(b) The repetitive inspections required by paragraphs (a)(1) through (a)(3) of this AD may be discontinued after the following is accomplished:
(1) Paragraph (a)(4) of this AD has been accomplished.
(2) A clamp is installed at frame 29 in accordance with paragraph 2D of the Avions Marcel Dassault - Breguet Aviation Service Bulletin F10-26-002, AMD-BA-F10-0141, dated June 17, 1977, or an FAA-approved equivalent (hereinafter referred to as "June Service Bulletin").
(3) Lines, P/N F10 A 791105A2 and F10 A 791115A2, have been installed in accordance with the June Service Bulletin.
(c) Airplanes may be flown in accordance with FAR 21.197 and FAR 21.199 to a maintenance base where the repairs and maintenance required by this AD are to be performed.
(d) Upon request of an operator, the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region, FAA, c/o American Embassy, Brussels, Belgium, may adjust the inspection interval specified in paragraph (a) of this AD or approve modifications equivalent to these specified in paragraph (b) of this AD provided that such requests are made through an FAA maintenance inspector and the request contains substantiating data to justify the request for that operator.
This amendment becomes effective January 19, 1978.