Is AD 98-21-15 a recurring Airworthiness Directive?

No — AD 98-21-15 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-21-15 apply to?

AD 98-21-15 applies to Socata — models TBM 700. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-21-15

one-time

Official AD 98-21-15 · FR doc 98-26968 · 1998-10-13 · airframe

Airworthiness Directives; SOCATAGroupe AEROSPATIALE Model TBM 700 Airplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to certain SOCATA--Groupe AEROSPATIALE (SOCATA) Model TBM 700 airplanes. This AD requires modifying the oxygen generators. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for France. The actions specified by this AD are intended to prevent failure of the oxygen generators caused by misalignment of the firing pin, which could result in crew incapacitation and loss of the airplane.

Which aircraft AD 98-21-15 applies to

MakesSocata

ModelsTBM 700

Serial-conditional — narrows to serials 1–125, 127–128, 130–133.

Whether AD 98-21-15 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 98-21-15 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.