Is AD 2021-04503 a recurring Airworthiness Directive?

No — AD 2021-04503 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-04503 apply to?

AD 2021-04503 applies to Bell Textron Inc. — models 205B, 205. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-04503

one-time

AD 2021-04503 · 2021-03-09 · 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 Bell Textron Inc. (Bell) Model 205B helicopters. This AD was prompted by flight testing and fatigue analysis results. This AD requires reducing the life limit of certain tail rotor (T/R) blades and re- identifying them with a new part number (P/N). The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-04503 applies to

MakesBell Textron Inc.

Models205B, 205

Part-conditional — 212-010-750-009, 212-010-750-105, 212-010-750-109, 212-010-750-111, 212-010-750-113, 212-010-750-117, 212-010-750-133, 212-010-750-135.

Applies only if a tail rotor (T/R) blade with one of the listed part numbers is installed.

Whether AD 2021-04503 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 2021-04503 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.