Is AD 2015-20-09 a recurring Airworthiness Directive?

Yes — AD 2015-20-09 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2015-20-09 apply to?

AD 2015-20-09 applies to General Electric — models 100-2, 110-1, 110-2, 140-1, 140-2, CT58. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2015-20-09

recurring

Official AD 2015-20-09 · FR doc 2015-25719 · 2015-10-14 · turboshaft engine

Airworthiness Directives; General Electric Company Turboshaft Engines

What this AD requires

We are superseding airworthiness directives (AD) 2001-18-06 and AD 2008-22-16, for all General Electric Company (GE) CT58 turboshaft engines. AD 2001-18-06 and AD 2008-22-16 required recalculating the lives of life-limited rotating parts using a repetitive heavy-lift (RHL) multiplying factor and removal from service of parts that exceed the recalculated cyclic or hourly life limit. This new AD would consolidate AD 2001-18-06 and AD 2008-22-16, and further reduce the life capability of certain parts. This AD was prompted by recalculation of life for parts installed on engines used in Utility operations, and a reduced life for compressor spools in all operations. We are issuing this AD to prevent failure of life-limited rotating parts, uncontained part release, damage to the engine, and damage to the aircraft.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2015-20-09 applies to

MakesGeneral Electric

Models100-2, 110-1, 110-2, 140-1, 140-2, CT58

Whether AD 2015-20-09 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 2015-20-09 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.