Germany’s BFU reported in their August bulletin released in November 2012, that the autopilot was disengaged at 700 feet AGL while on approach to runway 26R, the first officer assumed control of the aircraft. The approach was fully stabilized until about 100 feet AGL, when the sink rate began to reduce to 400 fpm, below 70 feet AGL the sink rate increased again to 850 fpm. The aircraft crossed the runway threshold at 25 feet AGL and touched down about 140 meters past the runway threshold at 130 KIAS and 500 fpm rate of descent producing a vertical acceleration of 1.9G. The aircraft immediately lifted off again reaching a height of about 8-10 feet and touched down a second time about 410 meters past the runway threshold the aircraft experienced 4.2G vertical acceleration and the tail contacted the runway, at that time dual input by both first officer and captain was recorded by the flight data recorder.