Is AD 2004-10-07 a recurring Airworthiness Directive?

Yes — AD 2004-10-07 requires a repetitive inspection every 25 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2004-10-07 apply to?

AD 2004-10-07 applies to Bell — models 407. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-10-07

recurring

Official AD 2004-10-07 · FR doc 04-11039 · 2004-05-20 · airframe

Airworthiness Directives; Bell Helicopter Textron Canada Model 407 Helicopters

What this AD requires

This amendment supersedes an existing airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 407 helicopters which requires a one-time replacement of certain oil cooler blower bearings. Also, the existing AD requires adding a limitation and caution to the rotorcraft flight manual (RFM) and inspecting, replacing, and lubricating certain bearings at specified intervals. This amendment adds certain segmented drive shaft bearings to the applicability and requires modifying the oil cooler blower inlet ducts and airflow shields and replacing certain bearings. Thereafter, this amendment requires removing the current temporary limitations and inserting revised limitations into the RFM. This amendment also requires revising the inspection and lubrication requirements. This amendment is prompted by several cases of bearing failure. The addition of certain segmented drive shaft bearings is due to two recent failures. The actions specified by this AD are intended to prevent failure of a bearing, loss of tail rotor drive, and a subsequent loss of directional control of the helicopter.

Repetitive inspection. Re-inspect every 25 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2004-10-07 applies to

MakesBell

Models407

Part-conditional — 406-040-339-ALL, 407-340-339-101, 407-340-339-103, 407-340-339-107.

Applies only if bearing P/N 406-040-339-ALL, 407-340-339-101, 407-340-339-103, or 407-340-339-107 is installed on the oil cooler blower bearing assembly or segmented tail rotor drive shaft assembly.

Whether AD 2004-10-07 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 2004-10-07 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 →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.