AircraftDirectives
Airworthiness Directive

AD 99-03-05 64 FR 5149

Federal Aviation Administration · 14 CFR part 39

FR document
99-2474
Amendment
39-11019
Published
1999-02-03
Models covered
1
Last live check
2026-08-17

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AD

99-03-05

FR doc 99-2474 · 64 FR 5149

AD 99-03-05Published 1999-02-03Effective 1999-02-18

Requires the removal and replacement of the crankshaft gear retaining bolts.

Full official abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to Textron Lycoming Model O-540-F1B5 reciprocating engines. This action requires the removal and replacement of the crankshaft gear retaining bolts. This amendment is prompted by 2 reported failures of the crankshaft gear retaining bolts. The actions specified in this AD are intended to prevent failure of the crankshaft gear retaining bolts, which can result in engine failure and subsequent autorotation and forced landing.

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Applies to 1 model in our index