Is AD 2005-09-51 a recurring Airworthiness Directive?

No — AD 2005-09-51 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2005-09-51 apply to?

AD 2005-09-51 applies to Turbomeca — models Arrius 2F, Arrius. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2005-09-51

one-time

Official AD 2005-09-51 · FR doc 05-9982 · 2005-05-19 · turboshaft engine

Airworthiness Directives; Turbomeca Arrius 2F Turboshaft Engines

What this AD requires

This document publishes in the Federal Register an amendment adopting emergency airworthiness directive (AD) 2005-09-51 that we sent previously to all known U.S. owners and operators of certain Turbomeca Arrius 2F turboshaft engines. This AD requires before further flight, replacing the Module 2 on certain engines listed by serial number (SN) in this AD. This AD results from a report of the failure of a high pressure turbine (HPT) blade and damage to two other HPT blades in a Turbomeca Arrius 2F turboshaft engine. We are issuing this AD to prevent failure of the engine and subsequent loss of power.

Which aircraft AD 2005-09-51 applies to

MakesTurbomeca

ModelsArrius 2F, Arrius

Serial-conditional — narrows to serials 34416–34450, 34033–34033, 34177–34177.

Applies only to the specific engines listed by serial number in Table 1 of the AD (paired with Module 2 serial numbers). Installed on, but not limited to, Eurocopter EC 120B helicopters.

Whether AD 2005-09-51 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 2005-09-51 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.