AircraftDirectives
Airworthiness Directive

AD 2011-08-06 76 FR 20231

Federal Aviation Administration · 14 CFR part 39

FR document
2011-8470
Amendment
39-16656
Published
2011-04-12
Models covered
1
Last live check
2026-08-17

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AD

2011-08-06

FR doc 2011-8470 · 76 FR 20231

AD 2011-08-06Published 2011-04-12Effective 2011-05-17

Requires removing certain power turbine rotors from service using a specific drawdown schedule.

Full official abstract

We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires removing certain power turbine rotors from service using a specific drawdown schedule. This AD was prompted by reports of fatigue cracks in the airfoil of the power turbine blades. We are issuing this AD to prevent fracture of the power turbine blade airfoil, which could result in sudden loss of engine power and prevent continued safe flight or safe landing.

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Applies to 1 model in our index