Is AD 2021-13-04 a recurring Airworthiness Directive?

Yes — AD 2021-13-04 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2021-13-04 apply to?

AD 2021-13-04 applies to Airbus Helicopters — models AS332C, AS332C1, AS332L, AS332L1, AS332. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-13-04

recurring

Official AD 2021-13-04 · FR doc 2021-14340 · 2021-07-07 · airframe

Airworthiness Directives; Airbus Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model AS332C, AS332C1, AS332L, and AS332L1 helicopters. This AD was prompted by a report of a yaw control failure that was the result of the disconnection of the tail rotor hub (TRH) pitch control rod from the tail rotor servo-control, which resulted from a seized TRH bearing. The TRH bearing had grease dissolving after contamination by leaked hydraulic fluid from the tail rotor servo- control that came through the TRH assembly boot. This AD requires repetitive inspections for hydraulic leaks, corrective actions if necessary, and an optional modification which constitutes terminating action, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the 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 2021-13-04 applies to

MakesAirbus Helicopters

ModelsAS332C, AS332C1, AS332L, AS332L1, AS332

Part-conditional — 332A33-0001-05, 332A33-0001-06.

Applies only to helicopters with a tail rotor hub (TRH) assembly, P/N 332A33-0001-05 or 332A33-0001-06, installed.

Whether AD 2021-13-04 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 2021-13-04 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.