Is AD 2004-15-11 a recurring Airworthiness Directive?

No — AD 2004-15-11 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2004-15-11 apply to?

AD 2004-15-11 applies to Eurocopter — models EC155B, EC155B1, EC155. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-15-11

one-time

Official AD 2004-15-11 · FR doc 04-17219 · 2004-07-30 · airframe

Airworthiness Directives; Eurocopter France Model EC155B and B1 Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) for the specified Eurocopter France (ECF) model helicopters that requires cleaning the auxiliary system unit (ASU) board and modifying the wiring and wiring harness. If a temporary modification is done, the AD requires inserting a placard regarding on- ground operation of the emergency landing gear pump (pump). Also, this AD revises the Limitations section of the Rotorcraft Flight Manual (RFM) to limit the operation of the pump. Permanently modifying the wiring and wiring harness and removing the placard and limitations from the RFM is terminating action for the requirements of this AD. This amendment is prompted by the report of an emergency landing with the landing gear retracted. The landing gear failed to extend in normal and emergency extension modes following failure of the ASU board 10 Alpha 2. The actions specified by this AD are intended to prevent an electrical short circuit, failure of landing gear to extend, and a landing gear-up emergency landing.

Which aircraft AD 2004-15-11 applies to

MakesEurocopter

ModelsEC155B, EC155B1, EC155

Part-conditional — SE07451.

Applies only to EC155B and B1 helicopters with auxiliary system unit (ASU) board 10 Alpha 2, P/N SE07451, installed.

Whether AD 2004-15-11 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 2004-15-11 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.