Is AD 99-06-03 a recurring Airworthiness Directive?

No — AD 99-06-03 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 99-06-03 apply to?

AD 99-06-03 applies to Eurocopter — models AS365. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 99-06-03

one-time

Official AD 99-06-03 · FR doc 99-5726 · 1999-03-09 · airframe

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

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to Eurocopter France Model AS-365N, N1, and N2 helicopters, that requires inspecting the helicopter to determine if a certain main rotor head frequency adapter (frequency adapter) is installed and, if so, replacing it with an airworthy frequency adapter. This amendment is prompted by a report of disbonding of the metal center section of a frequency adapter from the elastomer on a main rotor head caused by a lack of adherence during the production process. The actions specified by this AD are intended to prevent increased vibrations caused by disbonding of the center section of a frequency adapter from the elastomer and subsequent reduced controllability of the helicopter.

Which aircraft AD 99-06-03 applies to

MakesEurocopter

ModelsAS365

Part-conditional — 704A33-640-031, 365A31-1858-01, 704A33-640-046, 365A31-1858-02.

Applies only if a main rotor head frequency adapter of the affected configuration is installed: P/N 704A33-640-031 (E1T2624-01A) or paired-delivery P/N 365A31-1858-01, manufactured before Apr 1 1991 with component S/N <= 8188; or P/N 704A33-640-046 (E1T3023-01) or paired-delivery P/N 365A31-1858-02, manufactured before Apr 1 1991 with component S/N <= 3122. Affected adapters must be removed/replaced within 100 hours TIS or 6 calendar months. Relates to Eurocopter AS365 SB 01.00.44.

Whether AD 99-06-03 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 99-06-03 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.