67-25-04 FAIRCHILD: Amdt. No. 39-472, Part 39, Federal Register May 30, 1967. Applies to Type F-27 Airplanes, Serial Numbers 108 through 123, inclusive, and FH-227 Airplanes, Serial Numbers 503, 506, through 518, 520 through 535, and 538.
Due to numerous elongated and double-drilled rivet holes found in the fuselage skin, accomplish the following within the next 150 hours' time in service after the effective date of this AD unless already accomplished.
(a) For F-27 Airplanes, comply with the Accomplishment Instructions of Fairchild-Hiller Service Bulletin No. 53-49 (F-27), dated April 14, 1967 and FH-227 Airplanes, comply with Accomplishment Instructions of Fairchild Hiller Service Bulletin No. 53-7 (FH-227), dated April 14, 1967, or later FAA-approved revisions, or FAA-approved equivalent modification.
(b) Equivalent inspections may be approved by an FAA maintenance inspector. Equivalent parts, Service Bulletin revisions, and modifications, must be approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
(c) Upon request with substantiating data submitted through an FAA maintenance inspector, the compliance time specified in this AD may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
This amendment effective September 8, 1967.