AD 98-09-24 63 FR 23657

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.