Is AD 00-24900 a recurring Airworthiness Directive?

No — AD 00-24900 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 00-24900

Q: Which aircraft does AD 00-24900 apply to?

AD 00-24900 applies to Turbomeca — models Arriel 1A, Arriel 1A1, Arriel 1A2, Arriel 1B, Arriel 1C, Arriel 1C1, Arriel 1C2, Arriel 1D. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 00-24900 · 2000-10-02 · turboshaft engine

Airworthiness Directives; Turbomeca Arriel 1 Series Turboshaft Engines

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Turbomeca Arriel 1 series turboshaft engines. This action requires the installation of a chip detector with electronic warning on the rear bearing oil return system. This amendment is prompted by reports of gas generator rear bearing failures. The actions specified in this AD are intended to prevent gas generator rear bearing failure, which could lead to an uncommanded engine shutdown.

Which aircraft AD 00-24900 applies to

MakesTurbomeca

ModelsArriel 1A, Arriel 1A1, Arriel 1A2, Arriel 1B, Arriel 1C, Arriel 1C1, Arriel 1C2, Arriel 1D, Arriel 1D1, Arriel 1K, Arriel 1K1, Arriel 1S, Arriel 1S1, Arriel

Installed on, but not limited to, Eurocopter AS350/AS355/AS365 series, Agusta A109K2, and Sikorsky S-76A/76A+/76A++/76C helicopters.

Whether AD 00-24900 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 00-24900 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.