radar return was received at 20:39:36. Three minutes later,  the controllers were notified by police that an airplane had  crashed into a building. accounted for. It was not possible to assess control continuity  due to impact and subsequent fire. One witness reported that the airplane was flying at an altitude  of about 500 feet above ground level (AGL) in a southeast  direction when it made “a slight right turn, then a slight left  turn, then a sharp right turn, then descended in what appeared  to be in excess of 30° nose down.” A second witness observed  the airplane at an altitude of less than 100 feet AGL “in an  excessive nose-down attitude towards the ground.” Both  witnesses reported that a large post-impact fire erupted. The pilot, seated in the right front seat, held a commercial  pilot certificate with airplane single- and multi-engine  land and instrument ratings. Additionally, he held a flight  instructor certificate with airplane single-engine land and  instrument airplane ratings. According to Federal Aviation  Administration (FAA) records, the pilot had accumulated a  total flight time of over 1,400 hours. The passenger, who was  seated in the left front seat, held a private pilot certificate with  an airplane single-engine land rating. Records indicated the  passenger was 6 feet 3 inches tall and weighed 231 pounds.  [Figure 6-2]  Upon interview, representatives of the manufacturer indicated  that the original pilot (left) seat in the airplane was replaced  by the owner about a month prior to the accident with a six- way power seat from an automobile.  [Figure 6-3]  It was  installed to accommodate customer requests for an adjustable  seat. This seat incorporated three motors that facilitated the  six-way movement of the seat. In its original automotive  installation, it was wired using a 30-amp circuit breaker for  protection; if any motor failed, the automobile circuit would  trip. As installed in the automobile, if the breaker did not  trip, the switch itself would fail. The seat was installed in  the airplane with a 5-amp circuit breaker, but shortly after  installation, it was noted that a larger person in the left seat  would trip the circuit breaker and the motors became hot.  The airplane was constructed by its manufacturer as a  prototype for an experimental amateur-built kit and was  issued a special airworthiness certificate in the category  of experimental research and development. Material  examination of the engine and propeller indicated no  pre-accident discrepancies, and all major structures were  6-3 Figure 6-3.  This pilot simply wanted to be comfortable while flying. Figure 6-2.  The pilot must consider all aspects of the flight to include form, fit, and function.