Is AD 2017-02-51 a recurring Airworthiness Directive?

No — AD 2017-02-51 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2017-02-51 apply to?

AD 2017-02-51 applies to Sikorsky Aircraft Corporation — models S-92A, S-92. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2017-02-51

one-time

Official AD 2017-02-51 · FR doc 2017-04115 · 2017-03-03 · airframe

Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters

What this AD requires

We are publishing a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters. This AD requires inspecting certain bearings. This AD is prompted by reports of failed bearings with subsequent loss of tail rotor (TR) control. The actions of this AD are intended to address an unsafe condition on these helicopters.

Which aircraft AD 2017-02-51 applies to

MakesSikorsky Aircraft Corporation

ModelsS-92A, S-92

Part-conditional — 92358-06303-041, 92358-06303-042.

Applies only to helicopters with a tail rotor pitch change shaft (TRPCS) assembly P/N 92358-06303-041 or 92358-06303-042 installed. Effective March 20, 2017 except for persons already subject to Emergency AD 2017-02-51, issued January 13, 2017.

Whether AD 2017-02-51 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 2017-02-51 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.