Is AD 98-09-14 a recurring Airworthiness Directive?

No — AD 98-09-14 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-09-14 apply to?

AD 98-09-14 applies to Bombardier-Rotax. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-09-14

one-time

Official AD 98-09-14 · FR doc 98-11008 · 1998-04-28 · reciprocating engine

Airworthiness Directives; Diamond Aircraft Industries Models HK 36 TTS and HK 36 TTC Sailplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to certain Diamond Aircraft Industries (Diamond) Models HK 36 TTS and HK 36 TTC sailplanes. This AD requires inspecting the engine turbocharger oil-pressure line for the correct banjo bolt. The correct banjo bolt will have a valve seat, instead of a built-in orifice. If the banjo bolt does not have a valve seat, then this action will require replacing the banjo bolt with one that has a valve seat, and repairing or replacing the turbocharger. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Austria. The actions specified by this AD are intended to prevent possible loss of engine power, which could result in possible loss of control of the sailplane.

Which aircraft AD 98-09-14 applies to

MakesBombardier-Rotax

Part-conditional — 941 782.

Applies to sailplanes fitted with a Bombardier ROTAX engine having a turbocharger (specific sailplane make/model not stated in provided applicability text; ROTAX Technical Bulletin No. 914-04 suggests engine model 914, not independently confirmed). Within next 10 hours TIS after effective date, inspect the turbocharger oil-pressure line for a banjo bolt with a valve seat, P/N 941 782 (or FAA-approved equivalent); an incorrect bolt has a built-in orifice instead of a valve seat. If incorrect, replace the banjo bolt (P/N 941 782 or equivalent) and repair/replace the turbocharger prior to further flight, per Bombardier ROTAX Technical Bulletin No. 914-04 (Aug 1997).

Whether AD 98-09-14 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 98-09-14 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.