AircraftDirectives
Airworthiness Directive

AD 2011-18-09 76 FR 56637

Federal Aviation Administration · 14 CFR part 39

FR document
2011-22244
Amendment
39-16791
Published
2011-09-14
Models covered
1
Last live check
2026-08-17

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AD

2011-18-09

FR doc 2011-22244 · 76 FR 56637

AD 2011-18-09Published 2011-09-14Effective 2011-09-29

Requires a crankshaft inspection for certain parts that may be installed.

Full official abstract

We are adopting a new airworthiness directive (AD) for certain model IO-720-A1B Lycoming Engines reciprocating engines. This AD requires a crankshaft inspection for certain parts that may be installed. This AD was prompted by the failure of a crankshaft due to incorrect parts installed. We are issuing this AD to prevent engine crankshaft failure and damage to the airplane.

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Applies to 1 model in our index