Is AD 2012-03-01 a recurring Airworthiness Directive?

No — AD 2012-03-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-03-01 apply to?

AD 2012-03-01 applies to Turbomeca — models 2B, 2B1, Arrius. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-03-01

one-time

Official AD 2012-03-01 · FR doc 2012-3184 · 2012-02-15 · turboshaft engine

Airworthiness Directives; Eurocopter Deutschland Model EC135 Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Eurocopter Deutschland (ECD) Model EC135 helicopters. This AD results from a mandatory continuing airworthiness information (MCAI) AD issued by the aviation authority of the Federal Republic of Germany, with which we have a bilateral agreement, to identify and correct an unsafe condition. The MCAI AD states that in the past, the FADEC FAIL caution light illuminated on a few EC135 T1 helicopters. It states that this was caused by a discrepancy in the parameters that was generated within the fuel main metering unit and transmitted to the FADEC. This discrepancy led to the display of the FADEC FAIL caution light and "freezing" of the fuel main metering valve at its position, resulting in loss of the automatic engine control in the affected system. With the MCAI AD, a synchronization procedure for pilots, which was already used in the past, is being reintroduced, which prevents the parameter discrepancy arising and thus sustains the automatic engine control. The AD actions are intended to prevent failure of the FADEC to automatically meter fuel, indicated by a FADEC FAIL cockpit caution light, and subsequent loss of control of the helicopter.

Which aircraft AD 2012-03-01 applies to

MakesTurbomeca

Models2B, 2B1, Arrius

Applies to Turbomeca Arrius 2B or 2B1 engines only when installed on Model EC135 helicopters, certificated in any category. Unsafe condition: a discrepancy generated within the fuel main metering unit and transmitted to the FADEC, which could lead to display of the FADEC FAIL caution light and freezing of the fuel main metering valve at its position, resulting in loss of automatic engine control.

Whether AD 2012-03-01 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 2012-03-01 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.