Is AD 2005-21-03 a recurring Airworthiness Directive?

No — AD 2005-21-03 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2005-21-03 apply to?

AD 2005-21-03 applies to Bell — models 206A, 206A-1, 206B, 206B-1, 206L, 206L-1, 206L-3, 206L-4. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2005-21-03

one-time

Official AD 2005-21-03 · FR doc 05-20677 · 2005-10-17 · airframe

Airworthiness Directives; Bell Helicopter Textron Canada Model 206A, A-1, B, B-1, L, L-1, L-3, L-4 Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) for the specified Bell Helicopter Textron Canada (BHTC) model helicopters that requires, before the first flight of each day, checking the tail rotor blade (blade) root doublers (doublers) for an edge void or de- bond on both sides of each blade, and if an edge void or de-bond is found, replacing the unairworthy blade with an airworthy blade. This AD also requires replacing any affected serial-numbered blade with an airworthy blade. This amendment is prompted by reports of de-bond of the doublers due to inadequate surface preparation resulting in poor adherence of the doublers. The actions specified by this AD are intended to prevent loss of a blade, loss of tail rotor control, and subsequent loss of control of the helicopter.

Which aircraft AD 2005-21-03 applies to

MakesBell

Models206A, 206A-1, 206B, 206B-1, 206L, 206L-1, 206L-3, 206L-4, 206

Part-conditional — 206-016-201-131.

Applies only to helicopters with tail rotor blade P/N 206-016-201-131, serial numbers with a prefix of 'CS' 4820 through 4845, installed. Certificated in any category.

Whether AD 2005-21-03 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 2005-21-03 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.