Is AD 98-08-14 a recurring Airworthiness Directive?

No — AD 98-08-14 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-08-14 apply to?

AD 98-08-14 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 98-08-14

one-time

Official AD 98-08-14 · FR doc 98-9476 · 1998-04-10 · airframe

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

What this AD requires

This amendment adopts a new airworthiness directive (AD) applicable to Eurocopter France (Eurocopter) Model SA-365N, N1 and AS- 365N2 helicopters that requires inspections of the main gearbox suspension diagonal cross-member (diagonal cross-member) for cracks, and removal of the diagonal cross-member and replacement with an airworthy diagonal cross-member if any crack is found. This amendment is prompted by several reports of the discovery of cracks in diagonal cross-members. The actions specified by this AD are intended to prevent failure of the diagonal cross-member which could cause the main gearbox to pivot, resulting in severe vibrations and a subsequent forced landing.

Which aircraft AD 98-08-14 applies to

MakesEurocopter France

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

Part-conditional — 365A38-3023-20, 365A38-3023-21, 365A38-3023-23, 365A38-3023-24.

Applies only to helicopters with main gearbox suspension diagonal cross-member P/N 365A38-3023-20, -21, -23, or -24 installed.

Whether AD 98-08-14 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 98-08-14 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.