Is AD 2012-21-09 a recurring Airworthiness Directive?

No — AD 2012-21-09 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-21-09 apply to?

AD 2012-21-09 applies to Eurocopter — models EC225 LP, EC225. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-21-09

one-time

Official AD 2012-21-09 · FR doc 2012-25894 · 2012-10-23 · airframe

Airworthiness Directives; Eurocopter France Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model EC225 helicopters with certain epicyclic modules installed. This AD requires inspecting the epicyclic module for the presence of a through-hole upstream of the magnetic plug. This AD is prompted by a report of a missing through-hole between the integrated collector and the magnetic plug, which would prevent the flow of chips from the integrated collector to the magnetic plug. This could result in the chip-detector system failing to detect deterioration of the main rotor mast lift bearing (lift bearing). These actions are intended to detect a missing through-hole and prevent lift bearing failure and subsequent loss of control of the helicopter.

Which aircraft AD 2012-21-09 applies to

MakesEurocopter

ModelsEC225 LP, EC225

Part-conditional — 332A32-5021-00, 332A32-5021-01.

Applies only when epicyclic module P/N 332A32-5021-00 or 332A32-5021-01 is installed.

Whether AD 2012-21-09 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 2012-21-09 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.