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Airworthiness Directive E6-13249

recurring
AD E6-13249 · 2006-08-14 · turboshaft engine

Airworthiness Directives; Turbomeca Arriel 1B, 1D, 1D1, and 1S1 Turboshaft Engines

What this AD requires

The FAA is revising an existing airworthiness directive (AD) for certain Turbomeca Arriel 1B, 1D, 1D1, and 1S1 turboshaft engines. That AD currently requires initial and repetitive position checks of the gas generator 2nd stage turbine blades on all Turbomeca Arriel 1B, 1D, 1D1, and 1S1 turboshaft engines. That AD also currently requires initial and repetitive replacements of 2nd stage turbines on 1B, 1D, and 1D1 engines only. This AD revision requires the same actions, but would relax the compliance times for initially replacing 2nd stage turbines in Arriel 1B, 1D, and 1D1 turboshaft engines. We are issuing this AD revision to clarify and relax the AD compliance times for 2nd stage turbine initial replacement on Arriel 1B, 1D, and 1D1 turboshaft engines. We are also issuing this AD revision to prevent in-flight engine shutdown and subsequent forced autorotation landing or accident.

Repetitive inspection. Re-inspect every 1500 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD E6-13249 applies to

MakesTurbomeca
ModelsArriel 1B, Arriel 1D, Arriel 1D1, Arriel 1S1, Arriel

Arriel 1B engines applicable only when fitted with 2nd stage turbine modification TU 148. Arriel 1B installed on, but not limited to, Eurocopter France AS-350B and AS-350A 'Ecureuil' helicopters. Arriel 1D installed on Eurocopter France AS-350B1 'Ecureuil' helicopters. Arriel 1D1 installed on Eurocopter France AS-350B2 'Ecureuil' helicopters. Arriel 1S1 installed on Sikorsky Aircraft S-76A and S-76C helicopters

Whether AD E6-13249 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 E6-13249 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.