Airworthiness Directive · Amendment 39-10560 · Alexander Schleicher Segelflugzeugbau Models ASW-19 and ASK 21 Sailplanes
Alexander Schleicher Segelflugzeugbau Models ASW-19 and ASK 21 Sailplanes
Model ASW-19 sailplanes (serial numbers 19019 through 19037, 19040, and 19042 through 19044), and Model ASK 21 sailplanes (serial numbers 21001 through 21345), certificated in any category.
This amendment adopts a new airworthiness directive (AD) that applies to certain Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Models ASW-19 and ASK 21 sailplanes. This AD requires: modifying the rudder surface panels; replacing the airbrake bellcrank; and modifying the rear canopy hinge structure. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified by this AD are intended to prevent loss of the canopy caused by design deficiency, airbrake failure caused by cracking, and rudder panel flutter caused by high density altitude conditions, all of which could result in reduced sailplane controllability.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
