Is AD 2004-04-09 a recurring Airworthiness Directive?

No — AD 2004-04-09 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2004-04-09 apply to?

AD 2004-04-09 applies to Pratt & Whitney Canada — models JT15D-1, JT15D-1A, JT15D-1B, JT15D. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-04-09

one-time

Official AD 2004-04-09 · FR doc 04-4100 · 2004-03-01 · turbine engine

Airworthiness Directives; Pratt & Whitney Canada JT15D-1, -1A, and -1B Turbofan Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney Canada (PWC) JT15D-1, -1A, and -1B turbofan engines with certain impellers part number (P/N) 3020365. This AD requires a one-time borescope inspection of the rear face of certain impellers for evidence of a machined groove or step, and repair or replacement of the impeller if a groove or step is found. This AD results from three reports of uncontained failure of the impeller. We are issuing this AD to prevent uncontained failure of the impeller and possible damage to the airplane.

Which aircraft AD 2004-04-09 applies to

MakesPratt & Whitney Canada

ModelsJT15D-1, JT15D-1A, JT15D-1B, JT15D

Part-conditional — 3020365.

Applies only to engines with impeller P/N 3020365 installed.

Whether AD 2004-04-09 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 2004-04-09 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.