19990723009729A

Etractedshed into a field under unknown circumstances and sustained substantial damage. (.19)on July 23, 1999, at 1815 eastern daylight time, a Cessna 150, N95534, operated by Andrews University, was substantially damaged on impact with terrain following a go-around from runway 21 (2,075 feet by 200 feet, turf) at Andrews University airpark (C20), berrien Springs, Michigan. Visual meteorological condtions prevailed at the time of the accident. The commercial flight instructor and dual student sustained minor injuries. The 14 CFR part 91 flight was not operating on a flight plan. The instrument training flight originated C20 at approximately 1700. The student stated that he had selected 20 degrees of flaps on a base-to-final approach to runway 21. The student reported that the aircraft's airspeed was 70 knots on final approach. He further stated that at approximately 1/4 down the runway, the instructor told him to execute a go-around. The student then stated that during the go-around, the instructor took control of the aircraft and initiated a left turn to avoid trees at the departure end of the runway. The student stated that during the go-around attempt, the flaps were r etracted to the 10 degrees, but he was unsure if they were then retracted to the 0 degree postion. Inspection of the aircraft by the federal aviation administration found the aircraft to be lying on a magnetic heading of approximately 160 degrees and 500-600 feet from the departure end of runway 21. Trees, which are approximately 85 feet in height with upsloping terrain, were noted at approximately 1,000 feet from the departure end of runway 21. A slash mark in the terrain was present 50 feet aft of the aircraft. The flaps were found in the 0 degree postion. Flight control and engine control continuity was established. The throttle and mixture controls were in their forward positions. The engine was rotated and a thumb compression from all cylinders was obtained. Fuel was observed leaking from the wreckage. The magnetos were rotated and a spark from each lead was obtained. The automated surface observing system at the southwest reginal airport, benton harbor, Michigan, reported an air temperature of 93 degrees at 1753. (.4)the instructional flight impacted terrain during a go-around from runway 21 (2,075 feet by 200 feet, turf). The final approach speed of the airplane was reported by the dual student to be 70 knots. He also reported that the go-around was executed 1/4 down the runway. The certified flight instructor reported, '...we seemed to be in ground effect...'. Upsloping terrain and trees, which were 85 feet in height, were present approximately 1,000 feet from the departure end of the runway. Inspection of the aircraft revealed no anomalies. (-23) a landing was attempted on the 2000' runway. When the aircraft floated, a go-around was attempted but the hi-density altitude and high humidity loss of power was not considered. A turn was started but aircraft struck the ground.