Is AD 96-06-03 a recurring Airworthiness Directive?

Yes — AD 96-06-03 requires a repetitive inspection every 100 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 96-06-03 apply to?

AD 96-06-03 applies to Enstrom Helicopter Corporation — models F-28, F-28A, F-28C, F-28C-2, 280, 280C. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 96-06-03

recurring

Official AD 96-06-03 · FR doc 96-6421 · 1996-03-19 · airframe

Airworthiness Directives; The Enstrom Helicopter Corporation Model F-28, F-28A, F-28C, F-28C-2, F-28F, 280, 280C, 280F, and 280FX Helicopters

What this AD requires

This amendment supersedes an existing airworthiness directive (AD), applicable to The Enstrom Helicopter Corporation (Enstrom) Model F-28, F-28A, F-28C, F-28C-2, F-28F, 280, 280C, 280F, and 280FX helicopters, that currently requires initial and repetitive inspections of a certain main rotor transmission clutch assembly (clutch assembly) for bearing roughness, noise, lock-up, or improper oil level and, if necessary, replacement of the clutch assembly. The existing AD also requires replacement of the clutch assembly at certain time-in-service intervals. This amendment requires the same inspections and replacements as required by the existing AD, but would provide for installation of an additional approved replacement part number and provide a reference to three additional manufacturer service documents. This amendment is prompted by the approval of an additional replacement clutch assembly; the manufacturer's issuance of additional service information, and the need to correct a service information letter's number. The actions specified by this AD are intended to prevent failure of the clutch assembly, loss of control of the main rotor system, and subsequent loss of control of the helicopter.

Repetitive inspection. Re-inspect every 100 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 96-06-03 applies to

MakesEnstrom Helicopter Corporation

ModelsF-28, F-28A, F-28C, F-28C-2, 280, 280C

Part-conditional — 28-13401-1, Formsprag CL 40526-1 through -7.

Applies to Model F-28/F-28A/F-28C/F-28C-2/280/280C helicopters with main rotor transmission clutch assembly P/N 28-13401-1 (Formsprag CL 40526-1 through -7) installed: daily pre-takeoff tachometer needle-split check and post-flight abnormal-noise check; inspect clutch for lock-up/bearing roughness if irregularities noted; within 25 hrs TIS log clutch P/N/hours/date; inspect oil level every 100 hrs TIS.

Whether AD 96-06-03 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 96-06-03 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.