Is AD 98-07-10 a recurring Airworthiness Directive?

No — AD 98-07-10 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-07-10 apply to?

AD 98-07-10 applies to Agusta S.P.A. — models AB412. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-07-10

one-time

Official AD 98-07-10 · FR doc 98-8464 · 1998-04-01 · airframe

Airworthiness Directives; Agusta S.p.A. Model AB 412 Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) that is applicable to Agusta S.p.A. (Agusta) Model AB 412 helicopters. This action requires an inspection of the tail rotor blades for debond voids and replacement, if necessary. This amendment is prompted by the loss of a tail rotor blade tip on a tail rotor blade while the helicopter was in service. This condition, if not corrected, could result in increased vibration levels, damage to the tail rotor drive system or tail rotor assembly, and subsequent loss of control of the helicopter.

Which aircraft AD 98-07-10 applies to

MakesAgusta S.P.A.

ModelsAB412

Part-conditional — 212-010-750-105.

Applies only to AB412 helicopters with tail rotor blades P/N 212-010-750-105 (S/N A5- series, all numbers) installed.

Whether AD 98-07-10 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 98-07-10 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.