Is AD 2011-26-02 a recurring Airworthiness Directive?

No — AD 2011-26-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2011-26-02

Q: Which aircraft does AD 2011-26-02 apply to?

AD 2011-26-02 applies to Turbomeca — models Arriel 1A, Arriel 1A1, Arriel 1B, Arriel 1C, Arriel 1C1, Arriel 1C2, Arriel 1D, Arriel 1D1. Serial/part conditions may narrow it to specific aircraft.

one-time

Official AD 2011-26-02 · FR doc 2011-31797 · 2011-12-13 · turboshaft engine

Airworthiness Directives; Turbomeca Arriel 1 Series Turboshaft Engines

What this AD requires

We are revising an existing airworthiness directive (AD) for the products listed above. This AD was prompted by Turbomeca restoring all or part of the life limits of the affected discs, and European Aviation Safety Agency's (EASA) issuance of AD 2010-0101R2, dated March 24, 2011, to do the same. Turbomeca has introduced a reinforced eddy- current inspection (ECI) which, combined with a revised analysis, allows the life limit of the affected discs to be extended. We are issuing this revision to prevent failure of the gas generator (GG) second stage turbine disc which could result in the release of high energy debris and damage to the helicopter.

Which aircraft AD 2011-26-02 applies to

MakesTurbomeca

ModelsArriel 1A, Arriel 1A1, Arriel 1B, Arriel 1C, Arriel 1C1, Arriel 1C2, Arriel 1D, Arriel 1D1, Arriel 1S1, Arriel

Applies only to engines that have incorporated Modification TU347.

Whether AD 2011-26-02 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 2011-26-02 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.