British Aircraft Corporation

BAc 111

The crew was engaged in a local test flight at Wisley Airport. After a 2,5 hours flight, the instructor gave his seat to the copilot to carry out 2 familiarisation circuits and landings. On final approach, the airplane was slightly below the glide and struck the ground in a slight nose-down attitude, bounced to a height of 20 feet then struck the runway surface a second time. It bounced to a height of 50 feet then the nose gear struck the ground first and collapsed. Out of control the airplane skidded on runway, lost its right main gear and came to rest. All five crew members were uninjured while the airplane was damaged beyond repair.

BAc 111

The aircraft took off at 1017 hours GMT from runway 10, at Wisley Aerodrome on its fifty third test flight. It was to carry out stalling tests in all configurations with the centre of gravity at 0.38 SMC (standard mean chord), the furthest aft limit for which the aircraft had then been cleared. Based on the radio-telephony conversations recorded in the Wisley Tower and the flight recorders carried aboard the aircraft, the flight was reconstructed. Following take-off the aircraft climbed in visual meteorological conditions on a westerly heading to 17 000 ft while monitored by Wisley radar. At 1026 the co-pilot reported that they were about to commence tests at flight level 170. By 1035, four stalls had been completed with the undercarriage and flaps up. The co-pilot acknowledged a fix from Wisley at 1036 hours and nothing further was heard from the aircraft. The flaps were then lowered to to investigate the stalling characteristics in this configuration. The stall was initiated about two minutes after the last contact, when the aircraft was between 15 000 and 16 000 ft. Approach to the stall appears to have been normal. When attempting recovery, the elevators responded initially to the control movement but subsequently floated to the fully up position in spite of a large push force on the control column. The aircraft then descended in a substantially horizontal fore and aft attitude at about 180 ft/sec (54 meters per sec). During the descent it banked twice to the right and once to the left and at one stage the engines were opened up to full power. This action resulted in a large nose-up pitch which was followed by a pitch down when power was taken off. The aircraft then assumed the substantially horizontal attitude in which it made impact with the ground. The final portion of the flight was observed by numerous eye witnesses who commented on the low level of engine noise and a sharp report from the aircraft which was heard while it was in the air. The aircraft had approached from the southwest, in a stable stalled condition, and crashed at about 1040 hours in a flat attitude. Following impact, the aircraft moved forward about 70 ft and some 15 ft to the right before coming to rest. It exploded and caught fire. All seven crew members, four engineers and three test pilots, were killed.