Is AD 2018-10-07 a recurring Airworthiness Directive?

No — AD 2018-10-07 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-10-07 apply to?

AD 2018-10-07 applies to Sikorsky Aircraft Corporation — models S-76C, S-76. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-10-07

one-time

Official AD 2018-10-07 · FR doc 2018-10581 · 2018-05-21 · airframe

Airworthiness Directives; Sikorsky Aircraft Corporation

What this AD requires

We are adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-76C helicopters. This AD requires inspecting the engine collective position transducer (CPT). This AD was prompted by reports of wear of the CPT that has resulted in several One Engine Inoperative (OEI) incidents. The actions of this AD are intended to detect and prevent an unsafe condition on these products.

Which aircraft AD 2018-10-07 applies to

MakesSikorsky Aircraft Corporation

ModelsS-76C, S-76

Part-conditional — 76900-01821-104.

Applies only to helicopters equipped with a Turbomeca, S.A., Arriel 2S1 or Arriel 2S2 engine, with an engine collective position transducer (CPT) P/N 76900-01821-104 installed.

Whether AD 2018-10-07 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 2018-10-07 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.