Is AD 99-23-02 a recurring Airworthiness Directive?

No — AD 99-23-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-23-02 apply to?

AD 99-23-02 applies to Eurocopter France — models SA-365N, SA-365N1, AS-365N2, SA-365, AS-365. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-23-02

one-time

Official AD 99-23-02 · FR doc 99-28654 · 1999-11-03 · airframe

Airworthiness Directives; Eurocopter France Model SA-365N, SA- 365N1, and AS-365N2 Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to Eurocopter France Model SA-365N, SA-365N1, and AS-365N2 helicopters, that requires replacing certain defective electrical modules with airworthy electrical modules. This amendment is prompted by the discovery of several defective electrical modules. The actions specified by this AD are intended to prevent loss of electrical continuity, which could cause loss of critical rotorcraft electrical systems and subsequent loss of control of the helicopter.

Which aircraft AD 99-23-02 applies to

MakesEurocopter France

ModelsSA-365N, SA-365N1, AS-365N2, SA-365, AS-365

Whether AD 99-23-02 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 99-23-02 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.