Introduction
The investigation report described a takeoff and climb event that resulted in a post-impact fire. Witnesses observed the airplane's takeoff roll and initial climb.
Witness Observations
According to witnesses, the airplane used approximately 4,000 feet of runway during the takeoff roll. During the initial climb, the wings were seen rocking. The airplane cleared a row of trees at the end of the runway by an estimated 20 to 30 feet. Subsequently, the airplane turned slightly to the left, began to descend, and the left wing impacted the terrain. A post-impact fire ensued.
Investigation Findings
The investigation found no evidence of preimpact mechanical malfunction. The number two propeller was found in a horizontal position, and no impact damage was noted on either propeller blade. The engine was tested and operated normally. The flaps were determined to have been extended to 25 degrees.
Single Engine Performance
Single engine performance calculations were performed for a 4,700-pound airplane with the flaps extended to 25 degrees. These calculations indicated a takeoff ground run of 3,636 feet.