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Airworthiness Directive 2017-14-08

recurring
Official AD 2017-14-08 · FR doc 2017-14545 · 2017-07-14 · turbine engine

Airworthiness Directives; CFM International S.A. Turbofan Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for certain CFM International S.A. (CFM) CFM56-3, -3B, and -3C turbofan engines. This AD was prompted by a report of dual-engine loss of thrust control (LOTC) that resulted in an air turn back. This AD requires initial and repetitive checks of the variable stator vane (VSV) actuation system in the high-pressure compressor (HPC). We are issuing this AD to address the unsafe condition on these products.

Repetitive inspection. Re-inspect every 12 months. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2017-14-08 applies to

MakesCfm International S.A.
ModelsCFM56-3, CFM56-3B, CFM56-3C, CFM56
Part-conditional — 1499M30G01, 1499M30G02, 1499M30G03, 1676M88G01.

Applies to engines with a steel high-pressure compressor (HPC) stator case, P/N 1499M30G01, 1499M30G02, 1499M30G03, or 1676M88G01, installed.

Whether AD 2017-14-08 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 2017-14-08 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.