Is AD 64-21-06 R2 a recurring Airworthiness Directive?

No — AD 64-21-06 R2 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 64-21-06 R2 apply to?

AD 64-21-06 R2 applies to Boeing Vertol — models 107-II, 107. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 64-21-06 R2

one-time

AD 64-21-06 R2 · 1964-01-01 · airframe

Airworthiness Directives; September 10, 1964. Amendment 39-2156 was effective April 9, 1975. This Amendment 39-3827 is effective July 7, 1980. FOOTER: Colum

Which aircraft AD 64-21-06 R2 applies to

MakesBoeing Vertol

Models107-II, 107

Original directive effective September 10, 1964; Amendment 39-2156 effective April 9, 1975; this Amendment 39-3827 (Revision 2) effective July 7, 1980.

Whether AD 64-21-06 R2 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 64-21-06 R2 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 →

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.