Is AD 2005-22-01 a recurring Airworthiness Directive?

No — AD 2005-22-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2005-22-01 apply to?

AD 2005-22-01 applies to Sikorsky — models S-76A, S-76B, S-76C, S-76. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2005-22-01

one-time

Official AD 2005-22-01 · FR doc 05-21256 · 2005-10-26 · 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 the Sikorsky Aircraft Corporation (Sikorsky) Model S-76A, B, and C helicopters. This action requires certain inspections of the main rotor lower bifilar arm assembly in the attachment area around the lower bifilar lugs for a crack. If a crack is found on any bifilar lug, this AD requires replacing the bifilar arm assembly with an airworthy bifilar arm assembly. If no crack is found, this AD requires a one-time test for the required torque on the lug nuts and, if necessary, applying the required torque and conducting the torque stabilization tests. This amendment is prompted by four reports of cracked bifilars. The actions specified in this AD are intended to prevent failure of a bifilar lug, damage to the main rotor control system, and subsequent loss of control of the helicopter.

Which aircraft AD 2005-22-01 applies to

MakesSikorsky

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

Part-conditional — 76103-08003-101.

Applies only to helicopters with a main rotor hub pilot fitting P/N 76103-08003-101, with 1500 or more hours time-in-service (TIS), installed. Certificated in any category.

Whether AD 2005-22-01 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 2005-22-01 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.