Is AD 2020-23929 a recurring Airworthiness Directive?

Yes — AD 2020-23929 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2020-23929 apply to?

AD 2020-23929 applies to Sikorsky — models S-70, S-70A, S-70C, S-70C(M), S-70C(M1), UH-60A, HH-60L, EH-60A. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2020-23929

recurring

AD 2020-23929 · 2020-10-29 · airframe

Airworthiness Directives; Various Restricted Category Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for various restricted category helicopters, originally manufactured by Sikorsky Aircraft Corporation (Sikorsky), Model EH-60A, HH-60L, S-70, S-70A, S-70C, S-70C(M), S-70C(M1), and UH-60A. This AD requires initial and recurring inspections of the main rotor (M/R) blade spindle cuff for a crack. This AD was prompted by multiple reports of a cracked M/R blade spindle cuff. These actions are intended to prevent an unsafe condition on these products.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2020-23929 applies to

MakesSikorsky

ModelsS-70, S-70A, S-70C, S-70C(M), S-70C(M1), UH-60A, HH-60L, EH-60A, UH-60, HH-60, EH-60

Part-conditional — 70150-09109-041.

Applies to various restricted category helicopters originally manufactured by Sikorsky Aircraft Corporation with main rotor (M/R) blade spindle cuff P/N 70150-09109-041 installed. Type certificate holders include but are not limited to ACE Aeronautics LLC, BHI H60 Helicopters LLC, Billings Flying Service Inc., Carson Helicopters, Delta Enterprise, High Performance Helicopters Corp., Northwest Rotorcraft LLC, Pickering Aviation Inc., PJ Helicopters Inc., Sikorsky Aircraft Corporation, SixtyHawk TC LLC, Skydance Blackhawk Operations LLC, Timberline Helicopters Inc., and Unical Aviation Inc.

Whether AD 2020-23929 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 2020-23929 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.