Is AD 2004-05-23 a recurring Airworthiness Directive?

Yes — AD 2004-05-23 requires a repetitive inspection every 100 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2004-05-23 apply to?

AD 2004-05-23 applies to Eurocopter — models AS350, AS355. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-05-23

recurring

Official AD 2004-05-23 · FR doc 04-5333 · 2004-03-10 · airframe

Airworthiness Directives; Eurocopter France Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, AS350C, AS350D, AS350D1, AS355E, AS355F, AS355F1, AS355F2, and AS355N Helicopters

What this AD requires

This amendment supersedes an existing airworthiness directive (AD) for the specified Eurocopter France (ECF) model helicopters that currently requires certain inspections of the main rotor swashplate bearing (bearing) and plugging the nonrotating swashplate vent holes and barrel nut orifices. This amendment eliminates most of those AD actions, which are now included in the Airworthiness Limitations section of the maintenance manual, but retains the requirements for the inspections and lubrication of the main rotor swashplate. This amendment also clarifies that repetitive maintenance of the main rotor swashplate and bearing is required at intervals not to exceed 100 hours time-in-service (TIS). This amendment is prompted by the need to clarify the AD wording to avoid any misinterpretation of the required interval for inspecting and lubricating the main rotor swashplate and bearing. The actions specified by this AD are intended to prevent failure of the bearing 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 2004-05-23 applies to

MakesEurocopter

ModelsAS350, AS355

Applies to each helicopter identified in the preceding (not captured) applicability provision, regardless of prior modification/alteration/repair in the affected area. Requires inspecting and lubricating the main rotor swashplate within 10 hours TIS and thereafter at intervals not exceeding 100 hours TIS, to prevent swashplate bearing failure and loss of control. Note 2 references the Eurocopter AS350 (dated April 26, 2001) and AS355 (dated May 31, 2001) Master Servicing Recommendations, Airworthiness Limitations section, as pertaining to this AD.

Whether AD 2004-05-23 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 2004-05-23 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.