AD 68-01-05

68-01-05 FAIRCHILD-HILLER: Amdt. 39-535. Applies to F-27 airplanes, Serial Numbers 1 through 124 inclusive and FH-227 airplanes Serial Numbers 501 to 555 inclusive, 557 to 561 inclusive, 564 to 566 inclusive, incorporating Hartman MC815 series motor controller.

Compliance required as follows:

To prevent hazards associated with flap drive system failure whereby the flaps are driven off the drive screwjacks, accomplish the following:

(a) Within the next 200 hours' time in service after the effective date of this AD, and thereafter at 200-hour intervals from the date of the last inspection, inspect flap system motor controller in accordance with Fairchild-Hiller Corporation Alert Service Bulletin F27-27-55A dated September 7, 1967 or FAA approved equivalent. This inspection may be terminated upon completion of the requirement of paragraph (b) of this AD.

(b) Within the next 500 hours' time in service after the effective date of this AD, unless already accomplished, rewire the flap drive circuit in accordance with Fairchild-Hiller F-27 Service Bulletin 27-56 Revision 1 dated October 26, 1967, for F-27 aircraft and Fairchild Hiller FH-227 Service Bulletin 27-13 Revision 1 dated October 26, 1967, for FH-227 aircraft or later revisions approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, or perform an equivalent modification approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

(c) Upon request with substantiating data submitted through an FAA Maintenance Inspector, compliance time may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

This amendment becomes effective January 9, 1968.