Is AD 88-03-01 a recurring Airworthiness Directive?

No — AD 88-03-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 88-03-01 apply to?

AD 88-03-01 applies to Pratt & Whitney Canada — models PT6B-36A, PT6B. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 88-03-01

one-time

AD 88-03-01 · 1988-01-01 · turboshaft engine

Airworthiness Directives; inflight engine shutdown, accomplish the following: (a) Prior to further flight, accomplish the following: (1) Attach a placard wh

Which aircraft AD 88-03-01 applies to

MakesPratt & Whitney Canada

ModelsPT6B-36A, PT6B

Attach a placard reading 'avoid N1 ranges, 78-80.5 percent, 95.6-97.6 percent' near the N1 speed indicators and place a copy of the AD in the rotorcraft flight manual; addresses possible loss of engine power or inflight engine shutdown.

Whether AD 88-03-01 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 88-03-01 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.