Is AD 2004-12-06 a recurring Airworthiness Directive?

No — AD 2004-12-06 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2004-12-06 apply to?

AD 2004-12-06 applies to Eurocopter — models EC155B, EC155B1, EC155. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-12-06

one-time

Official AD 2004-12-06 · FR doc 04-12905 · 2004-06-14 · airframe

Airworthiness Directives; Eurocopter France Model EC 155 B and B1 Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model EC 155 B and B1 helicopters. This action requires inspecting each main rotor blade (blade) for a crack in the blade tip cap mounting bracket (tenon), measuring the vertical clearance between each blade assembly and a straight edge at the blade-to-tip cap junction, and replacing the blade if a crack is found or if the measured distance is not within certain specifications. This amendment is prompted by the discovery of a crack in a tenon. This condition, if not detected, could result in loss of the tip cap, which could lead to severe vibration and loss of control of the helicopter.

Which aircraft AD 2004-12-06 applies to

MakesEurocopter

ModelsEC155B, EC155B1, EC155

Part-conditional — 365A11-0080-00.

Applies only to EC155 B and B1 helicopters with main rotor blade P/N 365A11-0080-00 installed.

Whether AD 2004-12-06 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 2004-12-06 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.