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Airworthiness Directive 2004-05-28

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Official AD 2004-05-28 · FR doc 04-5331 · 2004-03-15 · airframe

Airworthiness Directives; Eurocopter France Model AS 365 N3 Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) for the specified Eurocopter France (Eurocopter) model helicopters that requires installing a tail rotor blade (blade)-to-torsion bar attachment tuning weight assembly on each blade of the Quiet Fenestron tail rotor and replacing each blade attachment bushing. This amendment is prompted by the discovery of tail rotor induced vibrations during flight tests. The actions specified by this AD are intended to prevent vibration in the tail rotor and the pilot's anti- torque pedals, blade pitch control failure, and subsequent loss of control of the helicopter.

Which aircraft AD 2004-05-28 applies to

MakesEurocopter
ModelsAS365N3, AS365
Part-conditional — 365A33-6005-06, 365A33-3500-02, 365A33-3530-20, 365A33-6214-20.

Applies only if a Quiet Fenestron tail rotor (tail rotor gearbox P/N 365A33-6005-06 and tail rotor hub P/N 365A33-3500-02), tail rotor hub attachment bushings P/N 365A33-3530-20, and a reinforced control shaft P/N 365A33-6214-20 are installed on the tail rotor hub control shaft assembly.

Whether AD 2004-05-28 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 2004-05-28 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.