Is AD 2012-23-12 a recurring Airworthiness Directive?

No — AD 2012-23-12 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-23-12 apply to?

AD 2012-23-12 applies to Turbomeca S.A. — models Arriel 1E2, Arriel 1S, Arriel 1S1, Arriel. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-23-12

one-time

Official AD 2012-23-12 · FR doc 2012-28637 · 2012-12-03 · turboshaft engine

Airworthiness Directives; Turbomeca S.A. Turboshaft Engines

What this AD requires

We are superseding an existing airworthiness directive (AD) for all Turbomeca S.A. Arriel 1E2, 1S, and 1S1 turboshaft engines. That AD currently requires a one-time inspection and torque check of the 3- way union plug installed on all fuel control units (FCUs). This new AD requires the same actions. This AD also requires reduction of the applicability to certain FCUs and references an updated service bulletin containing additional detailed information to identify the non-compliant "red disk." This AD also requires replacement of the plug before further flight if it is found to be non-compliant, and prohibits installation of FCUs that have not passed the 3-way union plug inspection and torque check. This AD was prompted by Turbomeca S.A. informing us that FCUs manufactured, repaired, or overhauled after March 31, 2008, do not require inspection. We are issuing this AD to prevent fuel leaks, which could result in a fire and damage to the helicopter.

Which aircraft AD 2012-23-12 applies to

MakesTurbomeca S.A.

ModelsArriel 1E2, Arriel 1S, Arriel 1S1, Arriel

Applies only to engines with fuel control units (FCUs) manufactured, repaired, or overhauled on or before March 31, 2008.

Whether AD 2012-23-12 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 2012-23-12 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.