Is AD 2021-26605 a recurring Airworthiness Directive?

No — AD 2021-26605 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-26605 apply to?

AD 2021-26605 applies to Bell Helicopter Textron Canada Limited — models 505. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-26605

one-time

AD 2021-26605 · 2021-12-09 · airframe

Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (type certificate previously held by Bell Helicopter Textron Canada Limited) Model 505 helicopters. This AD was prompted by the determination that reducing the pressure altitude limitations for certain fuel types is necessary. This AD requires revising the existing Rotorcraft Flight Manual (RFM) for your helicopter. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-26605 applies to

MakesBell Helicopter Textron Canada Limited

Models505

Serial-conditional — narrows to serials 65011–?.

Applies to helicopters with serial number 65011 and subsequent.

Whether AD 2021-26605 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 2021-26605 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.