Is AD 98-09-24 a recurring Airworthiness Directive?

No — AD 98-09-24 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 98-09-24 apply to?

AD 98-09-24 applies to Diamond, Hoffmann — models H-36, HK 36 R, HK 36. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 98-09-24

one-time

Official AD 98-09-24 · FR doc 98-11162 · 1998-04-30 · airframe

Airworthiness Directives; Diamond Aircraft Industries Models H-36 ``Dimona'' and HK 36 R ``Super Dimona'' Sailplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to certain Diamond Aircraft Industries (Diamond) Models H-36 ``Dimona'' and HK 36 R ``Super Dimona'' sailplanes. This AD requires: inspecting the elevator rib area for damage on certain Models H-36 ``Dimona'' and HK 36 R ``Super Dimona'' sailplanes, and either immediately or eventually replacing the elevator ribs depending on the results of the inspection; replacing the M6 screws that attach the wheel axle to steel support with M8 screws on certain Model HK 36 R ``Super Dimona'' sailplanes; and inspecting the shoulder harness fittings for improper bonding on certain Diamond Model H-36 ``Dimona'' sailplanes, and repairing any harness with an improper bond. 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 failure of either the shoulder harness fittings, elevator rib, or the wheel axle to steel support attachment, which could result in passenger injury caused by an inadequate restraint system; reduced sailplane controllability caused by structural damage to the elevator; and/or reduced sailplane controllability during takeoff, landing, and ground operations caused by the installation of incorrect wheel axle screws.

Which aircraft AD 98-09-24 applies to

MakesDiamond Hoffmann

ModelsH-36, HK 36 R, HK 36

Serial-conditional — narrows to serials 36301–36414, 36301–36327, 3501–3539, 3601–36143.

Applies to Model H-36 'Dimona' sailplanes (all serial numbers, for elevator rib inspection) and Model HK 36 R 'Super Dimona' sailplanes serial numbers 36301-36414 (elevator rib inspection); within that HK 36 R range, serials 36301-36327 additionally require replacing M6 wheel-axle-to-steel-support screws with M8 screws (Hoffman SB No. 27 / Work Instruction No. 10, 1991); H-36 serials 3501-3539 and 3601-36143 require shoulder harness fitting bonding inspection (Hoffman SB No. 17, 1987). Elevator rib replacement (if damaged, or as later required within 3,000 hours TIS) follows Diamond Work Instruction No. 21 / Diamond SB No. 51 (1996). Makes listed reflect both the original manufacturer (Hoffmann) and successor (Diamond) named in the referenced service bulletins.

Whether AD 98-09-24 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 98-09-24 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.