JULIAN, PA, USA
N40MS
Glaser-Dirks DIRK-DG-400
N686U
SCHWEIZER SGS-1-26B
THE PLT OF N686U REPORTED HE WAS ESTABLISHED IN A WEAK THERMAL AT AN ALT OF APRX 2500 AGL WHEN TWO OTHER GLIDERS WERE SEEN. ONE AT APRX THE SAME ALT AND ONE BELOW HIS ALT. HE CONTINUED TO STATE THAT THE GLIDER WHICH WAS AT HIS ALT PASSED VERY CLOSE TO BUT UNDERNEATH HIS GLIDER. HE STATED HE MOMENTARILY LOST SIGHT OF THE GLIDER BEFORE SEEING IT TURN AND AND CONTINUE IN THE THERMAL, HOWEVER, BECAUSE OF HIS GLIDERS ATTITUDE HE WAS UNABLE TO MAINTAIN VISUAL CONTACT WITH THE OTHER GLIDER. N686U WAS THEN STRUCK FROM THE RIGHT REAR BY N40MS. BOTH PLTS THEN LOST CONTROL OF THEIR GLIDERS WHICH DESCENDED TO GROUND IMPACT.
Source: NTSB Aviation Accident Database
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