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Airworthiness Directive 2011-08-06

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Official AD 2011-08-06 · FR doc 2011-8470 · 2011-04-12 · turboshaft engine

Airworthiness Directives; Honeywell International Inc. LTS101 Series Turboshaft Engines and LTP101 Series Turboprop Engines

What this AD requires

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.

Which aircraft AD 2011-08-06 applies to

MakesHoneywell International
ModelsLTS101-600A-2, LTS101-600A-3, LTS101-600A-3A, LTS101-700D-2, LTS101-650B-1, LTS101-650C-3, LTS101-650C-3A, LTS101-750B-1, LTS101-750B-2, LTS101-750C-1, LTS101-850B-2, LTP101-600A-1A, LTP101-700A-1A, LTS101, LTP101
Part-conditional — 4-141-290-01, 4-141-290-02, 4-141-290-03, 4-141-290-05, 4-141-290-06, 4-141-290-11, 4-141-290-12, 4-141-290-13.

Applies only to engines with power turbine rotor P/N 4-141-290-01, -02, -03, -05, -06, -11, -12, -13, -14, or -16 installed. Model list includes both LTS101 turboshaft engines and LTP101 turboprop engines; product_type reflects the majority (turboshaft) grouping.

Whether AD 2011-08-06 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.
Date — When the work was done.
Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.
Signature & certificate — The A&P/IA who returned it to service, with certificate number.
Is AD 2011-08-06 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.