Is AD 2021-17024 a recurring Airworthiness Directive?

No — AD 2021-17024 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-17024 apply to?

AD 2021-17024 applies to Bell Textron Inc. — models 204B, 205A, 205A-1, 205B, 212, 204, 205. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-17024

one-time

AD 2021-17024 · 2021-08-09 · airframe

Airworthiness Directives; Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron Inc.) Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Inc. (type certificate previously held by Bell Helicopter Textron Inc.) Model 204B, 205A, 205A-1, 205B, and 212 helicopters. This AD was prompted by a fatal accident in which an outboard main rotor hub strap pin (pin) sheared off during flight, resulting in the main rotor blade and the main rotor head detaching from the helicopter. This AD requires removing the pins from service before further flight and prohibits installing them on any helicopter. The FAA previously sent an emergency AD to all known U.S. owners and operators of these helicopters and is now issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-17024 applies to

MakesBell Textron Inc.

Models204B, 205A, 205A-1, 205B, 212, 204, 205

Part-conditional — 204-012-104-005.

Type certificate previously held by Bell Helicopter Textron Inc. Applies only to helicopters with an outboard main rotor hub strap pin P/N 204-012-104-005 with a serial number prefix 'FNFS' installed.

Whether AD 2021-17024 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 2021-17024 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.