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Airworthiness Directive 2017-17-18

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Official AD 2017-17-18 · FR doc 2017-18570 · 2017-09-01 · turbine engine

Airworthiness Directives; General Electric Company Turbofan Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for certain General Electric Company (GE) CF34-8 model turbofan engines. This AD was prompted by analysis that resulted in the reduction of the life of the affected fan blades. This AD requires inspections of the affected fan blades until their removal. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2017-17-18 applies to

MakesGeneral Electric Company
ModelsCF34-8C1, CF34-8C5, CF34-8C5A1, CF34-8C5B1, CF34-8C5A2, CF34-8C5A3, CF34-8E2, CF34-8E2A1, CF34-8E5, CF34-8E5A1, CF34-8E5A2, CF34-8E6, CF34-8E6A1, CF34-8C5B1/B, CF34-8C5/B, CF34-8C5A1/B, CF34-8C5A2/B, CF34-8C5/M, CF34-8C5A1/M, CF34-C8C5A2/M, CF34-8C5A3/B, CF34-8C5B1/M, CF34
Part-conditional — 4114T15P02, 4114T31G01.

Applies only to engines with fan blade P/N 4114T15P02 or P/N 4114T31G01 installed, including engines marked on the engine data plate with the alternate designations listed in the AD (e.g. CF34-8C5B1/B, CF34-8C5/B, CF34-8C5A1/B, CF34-8C5A2/B, CF34-8C5/M, CF34-8C5A1/M, CF34-C8C5A2/M, CF34-8C5A3/B, CF34-8C5B1/M).

Whether AD 2017-17-18 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 2017-17-18 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.