Is AD 2005-13-11 a recurring Airworthiness Directive?

No — AD 2005-13-11 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2005-13-11 apply to?

AD 2005-13-11 applies to General Electric Company (Ge) — models CT64-820-4, CT64. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2005-13-11

one-time

Official AD 2005-13-11 · FR doc 05-12173 · 2005-06-21 · turboprop engine

Airworthiness Directives; General Electric Company CT64-820-4 Turboprop Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for General Electric Company (GE) CT64-820-4 turboprop engines with stage 1 turbine disk and shaft, part number (P/N) 6004T47P03 or 4921T10P02 installed. This AD requires removing from service these stage 1 turbine disk and shafts at reduced compliance times. This AD results from the discovery by the manufacturer of low-cycle-fatigue (LCF) cracks found in stage 1 turbine disk and shafts, P/Ns 6004T47P03 and 4921T10P02. We are issuing this AD to prevent uncontained failure of the stage 1 turbine disk and shaft, resulting in damage to the airplane.

Which aircraft AD 2005-13-11 applies to

MakesGeneral Electric Company (Ge)

ModelsCT64-820-4, CT64

Part-conditional — 6004T47P03, 4921T10P02.

Applies only to engines with stage 1 turbine disk and shaft, P/N 6004T47P03 or 4921T10P02, installed. Installed on, but not limited to, DeHavilland DHC-5D Buffalo airplanes.

Whether AD 2005-13-11 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 2005-13-11 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.