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Airworthiness Directive 2017-05-09

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Official AD 2017-05-09 · FR doc 2017-04656 · 2017-03-09 · 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) CFM56-5 turbofan engines. This AD requires removal of the radial drive shaft (RDS) assembly and the RDS outer housing and their replacement with parts eligible for installation. This AD was prompted by reports of the failure of the RDS on CFM CFM56- 5B engines. We are issuing this AD to correct the unsafe condition on these products.

Which aircraft AD 2017-05-09 applies to

MakesCfm International
ModelsCFM56-5B, CFM56-5B/P, CFM56-5B/3, CFM56-5B/2P, CFM56-5B/P1, CFM56-5B/2P1, CFM56-5B/3B1, CFM56

Applies only to engines with a radial drive shaft (RDS) serial number listed in Appendix A of CFM Service Bulletin CFM56-5B S/B 72-0934, dated August 1, 2016, installed.

Whether AD 2017-05-09 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 2017-05-09 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.