Airworthiness Directive

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[Federal Register: June 7, 1963]

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Federal Aviation Administration

14 CFR Part 39

AD 63-12-02

Airworthiness Directives; Piper Model PA-23 Aircraft
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AGENCY: Federal Aviation Administration, DOT

DATES: Effective June 7, 1963.

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63-12-02 PIPER: Amdt. 572 Part 507 Federal Register June 7, 1963. Applies to Model PA-23 Aircraft Serial Numbers 23-1 Through 23-1284, and 23-1286.

Compliance required as indicated.

Due to cracks being found in the P/N 17058-3 elevator butt rib and the P/N 17058-20 elevator butt rib doubler plate, which parts are incorporated in the P/N 17058-00 elevator assembly originally installed on the above serial numbered aircraft, the following shall be accomplished:

(a) Within the next 50 hours' time in service after the effective date of this AD, unless already accomplished within the last 50 hours' time in service, and within every 100 hours' time in service thereafter visually inspect for cracks, elevator butt rib, P/N 17058-3 and elevator butt rib plate, P/N 17058-20 on the P/N 17058-00 elevator assembly. Replace cracked parts before further flight.

(b) After P/N 19446 elevator assembly is installed, the inspection specified in (a) is no longer required.

(c) Parts shall be assembled and installed to obtain proper alinement and to prevent distortion and over-torquing of the attachment bolts.

(Piper Service Bulletin No. 146B, dated October 25, 1962, pertains to this same subject.)

This directive effective June 7, 1963.