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Airworthiness Directive 04-17755

one-time
AD 04-17755 · 2004-08-06 · turboshaft engine

Airworthiness Directives; General Electric Company (GE); CT7-2D1 Turboshaft Engines.

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for GE CT7-2D1 turboshaft engines. This AD requires replacing certain turbine stage 2 aft cooling plates, part number (P/N) 6064T0P02. This AD results from an uncontained failure of a turbine stage 2 aft cooling plate in a GE CT7 turboprop engine. We are issuing this AD to prevent a similar uncontained failure of turbine stage 2 aft cooling plates in GE CT7-2D1 turboshaft engines.

Which aircraft AD 04-17755 applies to

MakesGeneral Electric
ModelsCT7-2D1, CT7
Serial-conditional — narrows to serials GFFN****–?, GFFP****–?, GFFR0***–GFFR7***, GFFR81**–GFFR89**, GFFR8A**–GFFR8G**, GFFR8H92–GFFR8H99, GFFR8H9A–GFFR8H9N.
Part-conditional — 6064T07P02.

Applies only to engines with turbine stage 2 aft cooling plate P/N 6064T07P02 whose serial number falls in one of the listed prefix ranges (asterisks represent any subsequent number/letter following the root SN).

Whether AD 04-17755 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 04-17755 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.