Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK 21 Gliders

This action confirms the effective date of Airworthiness Directive (AD) 95-11-15 R1, which applies to Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK 21 gliders. AD 95-11- 15 R1 requires replacing the parallel rocker with a part of improved design and incorporating flight manual revisions, but only for those gliders with the automatic elevator connection incorporated. AD 95-11- 15 was the result of two incidents of the parallel rocker breaking at the elevator connection on the affected gliders. Since that time, the FAA has determined that the AD should only affect those Model ASK 21 gliders equipped with the automatic elevator connection. The actions specified in this AD are intended to continue to prevent possible loss of elevator control that could result from a broken parallel rocker.