Is AD 2010-10-02 a recurring Airworthiness Directive?

No — AD 2010-10-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2010-10-02 apply to?

AD 2010-10-02 applies to Sikorsky — models S-76A, S-76B, S-76C, S-76. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2010-10-02

one-time

Official AD 2010-10-02 · FR doc 2010-10588 · 2010-05-13 · airframe

Airworthiness Directives; Sikorsky Aircraft Corporation Model S-76A, B, and C Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-76A, B, and C helicopters that requires inspecting each installed Woodward HRT (formerly HR Textron) main rotor servo actuator (servo actuator) for a high rate of leakage and replacing each affected servo actuator with a servo actuator containing a newly re-designed servo actuator piston. This amendment is prompted by a National Transportation Safety Board (NTSB) Safety Recommendation issued in response to an accident involving a Model S-76C helicopter. In the NTSB Safety Recommendation, the performance of a servo actuator piston upon reaching 3,000 hours time-in-service (TIS) was questioned as a result of piston head seal leakage and piston head plasma spray flaking. The actions specified by this AD are intended to prevent degraded servo actuator performance as a result of piston head seal leaking and plasma spray flaking, which could result in subsequent loss of control of the helicopter.

Which aircraft AD 2010-10-02 applies to

MakesSikorsky

ModelsS-76A, S-76B, S-76C, S-76

Part-conditional — 76650-09805-109, 76650-09805-110, 3006760-109, 3006760-110.

Applies only to helicopters with Sikorsky main rotor servo actuator P/N 76650-09805-109 or -110 (also marked as HR Textron or Woodward HRT P/N 3006760-109 or -110) installed. Certificated in any category.

Whether AD 2010-10-02 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 2010-10-02 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.