Is AD 75-04-07 a recurring Airworthiness Directive?

No — AD 75-04-07 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 75-04-07 apply to?

AD 75-04-07 applies to Pratt & Whitney — models JT3D-3, JT3D-3B, JT3D-7, JT3D. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 75-04-07

one-time

AD 75-04-07 · 1975-01-01 · turbine engine

Airworthiness Directives; HEADING: PRATT & WHITNEY AIRCRAFT Models JT3D-3, JT3D-3B, and JT3D-7 Engines ACTION: SUMMARY: DATES: Effective February 19, 1975.

Which aircraft AD 75-04-07 applies to

MakesPratt & Whitney

ModelsJT3D-3, JT3D-3B, JT3D-7, JT3D

Amendment 39-2084. Applies to all Pratt & Whitney Aircraft JT3D-3, JT3D-3B, and JT3D-7 turbofan engines. Disk cyclic life limits: JT3D-3 30,000/25,000 cycles, JT3D-3B 30,000/25,000 cycles, JT3D-7 25,000/23,000 cycles; if a disk has been used in more than one engine model, the disk is limited to the lowest cyclic life. Effective February 19, 1975.

Whether AD 75-04-07 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 75-04-07 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.