Is AD 2021-09278 a recurring Airworthiness Directive?

No — AD 2021-09278 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-09278 apply to?

AD 2021-09278 applies to Bell Textron Canada Limited — models 206L, 206L-1, 206L-3, 206L-4. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-09278

one-time

AD 2021-09278 · 2021-05-07 · 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 206L series helicopters. This AD was prompted by a manufacturing flaw that could cause low fuel level detector switch units (switch units) to hang in the high position and fail to indicate a low fuel condition. This AD requires removing certain switch units from service and prohibits installing those switch units. This AD also requires accomplishing an operational test of certain other switch units, and depending on the results, removing the switch unit from service. This AD also prohibits installing those certain other switch units unless they pass an operational test. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-09278 applies to

MakesBell Textron Canada Limited

Models206L, 206L-1, 206L-3, 206L-4

Part-conditional — 206-063-613-003.

Applies to helicopters with a low fuel level detector switch unit part number 206-063-613-003 with switch unit serial number 1413, 1414, 1415, 1424, 1428, 1430, 1432, or 1433 installed, or with a missing or illegible switch unit serial number or if the serial number cannot be determined.

Whether AD 2021-09278 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 2021-09278 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.