Is AD 98-14929 a recurring Airworthiness Directive?

No — AD 98-14929 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-14929 apply to?

AD 98-14929 applies to Eurocopter — models SA-365N, SA-365N1, SA-365N2, SA-366G1, SA-365, SA-366. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-14929

one-time

AD 98-14929 · 1998-06-04 · airframe

Airworthiness Directives; Eurocopter France (Formerly Aerospatiale, Society Nationale Industrielle, Sud Aviation) Model SA- 365N, SA-365N1, SA-365N2, and SA-366G1 Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD), applicable to Eurocopter France (Formerly Aerospatiale, Society Nationale Industrielle, Sud Aviation) Model SA-365N, SA-365N1, SA- 365N2, and SA-366G1 helicopters, that requires an inspection of the transmission deck for cracks; repair of any cracked transmission deck; and replacement of the transmission deck support beams (support beams) with redesigned support beams. This amendment is prompted by several reports of cracks in the transmission deck and support beams. The actions specified by this AD are intended to detect cracks that reduce the strength of the main gearbox strut attachment and could result in failure of the main gearbox mounting, and subsequent loss of control of the helicopter.

Which aircraft AD 98-14929 applies to

MakesEurocopter

ModelsSA-365N, SA-365N1, SA-365N2, SA-366G1, SA-365, SA-366

Part-conditional — 365A21-3365-49, 365A21-3365-CY, 365A21-3365-JE-01, 365A21-3365-JF-01.

Applies to Eurocopter (Eurocopter France) Model SA-365N, SA-365N1, SA-366G1 helicopters (compliance threshold 4,000 hours TIS) and Model SA-365N2 helicopters (2,000 hours TIS); requires transmission-deck dye-penetrant crack inspection and replacement of transmission deck support beams (old P/N 365A21-3365-49 and 365A21-3365-CY with new reinforced P/N 365A21-3365-JE-01 and 365A21-3365-JF-01) per Eurocopter France Telex Service No. 10011 (Feb 24, 1995) and SB No. 05.00.36 Rev. 1 (Dec 16, 1996), to prevent main gearbox strut attachment cracking and gearbox mounting failure. No serial-number range given; compliance is by hours TIS.

Whether AD 98-14929 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 98-14929 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.