Is AD 2004-13-01 a recurring Airworthiness Directive?

Yes — AD 2004-13-01 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2004-13-01 apply to?

AD 2004-13-01 applies to Dowty — models R334/4-82-F/13, R333/4-82-F/12, R321/4-82-F/8, R324/4-82-F/9, R334, R333, R321, R324. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-13-01

recurring

Official AD 2004-13-01 · FR doc 04-13773 · 2004-06-22 · propeller

Airworthiness Directives; Dowty Aerospace Propellers Type R321/4-82-F/8, R324/4-82-F/9, R333/4-82-F/12, and R334/4-82-F/13 Propeller Assemblies

What this AD requires

This amendment supersedes an existing airworthiness directive (AD) that applies to Dowty Aerospace Propellers (Dowty) Type R334/4-82- F/13 propeller assemblies. That AD currently requires a one-time ultrasonic inspection of propeller hubs, part number (P/N) 660709201, for cracks. This amendment requires initial and repetitive ultrasonic inspections of propeller hubs, P/N 660709201, that are installed on airplanes, and for hubs and propellers in storage, initial ultrasonic inspection of propeller hubs before placing in service. Propeller hubs, P/N 660709201, are installed on Type R321/4-82-F/8, R324/4-82-F/9, R333/4-82-F/12, and R334/4-82-F/13 propeller assemblies. This amendment results from the manufacturer's reevaluation of potential hub failure on Type R321/4-82-F/8, R324/4-82-F/9, R333/4-82-F/12, and R334/4-82-F/ 13 propeller assemblies. We are issuing this AD to prevent propeller hub failure due to cracks in the hub, which could result in loss of control of the airplane.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2004-13-01 applies to

MakesDowty

ModelsR334/4-82-F/13, R333/4-82-F/12, R321/4-82-F/8, R324/4-82-F/9, R334, R333, R321, R324

Part-conditional — 660709201.

Applies to each propeller identified in the preceding applicability provision (Table 1 assembly types R334/4-82-F/13, R333/4-82-F/12, R321/4-82-F/8, R324/4-82-F/9), regardless of prior modification/alteration/repair. Propeller hubs P/N 660709201 used on Type R334/4-82-F/13 assemblies previously inspected under a listed Dowty MSB (or earlier issue) are considered in compliance.

Whether AD 2004-13-01 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 2004-13-01 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 →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.