Is AD 2013-03-21 a recurring Airworthiness Directive?

No — AD 2013-03-21 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2013-03-21

Q: Which aircraft does AD 2013-03-21 apply to?

AD 2013-03-21 applies to Pratt & Whitney Canada — models PW206B, PW206B2, PW206C, PW207C, PW207D, PW207D1, PW207D2, PW207E. Serial/part conditions may narrow it to specific aircraft.

one-time

Official AD 2013-03-21 · FR doc 2013-03412 · 2013-02-19 · turboshaft engine

Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for certain serial number Pratt & Whitney Canada Corp. PW206B, PW206B2, PW206C, PW207C, PW207D, PW207D1, PW207D2, and PW207E turboshaft engines. This AD was prompted by the discovery that certain power turbine (PT) disks were made to specific heat codes that may not achieve the maximum in- service life. This AD requires re-identification of the PT disk to a part number (P/N) with a lower life limit. We are issuing this AD to prevent possible uncontained PT disk failure and loss of helicopter control.

Which aircraft AD 2013-03-21 applies to

MakesPratt & Whitney Canada

ModelsPW206B, PW206B2, PW206C, PW207C, PW207D, PW207D1, PW207D2, PW207E

Whether AD 2013-03-21 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 2013-03-21 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.