Is AD 2021-24-09 a recurring Airworthiness Directive?

Yes — AD 2021-24-09 requires a repetitive inspection every 50 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2021-24-09 apply to?

AD 2021-24-09 applies to Bell Textron Canada Limited — models 430. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-24-09

recurring

Official AD 2021-24-09 · FR doc 2021-25489 · 2021-11-22 · airframe

Airworthiness Directives; Bell Textron Canada Limited Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 430 helicopters. This AD was prompted by an in-flight failure of the main rotor (M/R) pitch link clevis (clevis) due to fatigue damage and excessive wear. This AD requires a visual inspection of the M/R clevis, rod end, and a certain part-numbered universal bearing, performing a purge grease, and performing a magnetic particle inspection of each M/R clevis. Depending on the visual inspection and magnetic particle inspection results, this AD requires removing certain parts from service, replacing certain parts, and performing additional actions. This AD also requires recurring inspections of each M/R clevis and each universal bearing. The FAA is issuing this AD to address the unsafe condition on these products.

Repetitive inspection. Re-inspect every 50 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2021-24-09 applies to

MakesBell Textron Canada Limited

Models430

Serial-conditional — narrows to serials 49001–49129.

Whether AD 2021-24-09 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 2021-24-09 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.