United States of America

During descent into Billings, the Citation was sequenced behind a Boeing 757, and both airplanes were eventually cleared for visual approaches. About 1-1/2 mile from the runway the Citation was observed to roll rapidly to the inverted position and descended almost vertically into the ground. According to ATC transcripts and the airplane's cockpit voice recorder, the crew of the Citation had maintained visual awareness of the position of the B757 throughout the approach. At the time of the upset, the vertical separation between airplanes was 600 - 1,000 feet, and the horizontal separation was decreasing below 2.6 miles. One of the Citation captain's last comments was 'almost ran over a seven fifty seven.' Winds were 5 knots. All eight occupants were killed.

During the takeoff roll on a contaminated runway, the copilot noted a lack of acceleration. Just beyond midfield, the copilot called for an abort, however, the pilot elected to continue. The airplane did not reach Vr and the pilot attempted to rotate the airplane at the end of the runway. The airplane collided with and travelled through a five foot high snowbank and came to rest in a field approximately 500 feet from the end of the runway. During the post crash investigation, evidence indicated that the parking brake had been in the intermediate position or 23% of maximum braking. The parking brake warning light was found to operate correctly if the panel lights were set in the bright light position. In the dim position, the warning light was inoperative. During the on site investigation, the panel lights were found in the dim position. Both passengers were slightly injured while both pilots were seriously injured.

After rotation, during the initial climb, the nose of the airplane pitched up to approximately 60° above the horizon. The airplane continued to climb until about 250 feet above the ground, then rolled right, pitched down and descended. The airplane impacted the ground, approximately 45° nose down, 650 feet to the right of the runway. Post accident investigation of the wreckage revealed the elevator jammed in the full up deflection. The upper end of the elevator control rod was found not connected to the elevator, but was found laying aft, wedged between the tail cone and the elevator faring, holding the elevator in the full up position. The control rod connecting bolt was found laying in the bottom of the tail cone undamaged. The washer, nut and cotter pin related to the control rod connecting bolt were not found. The elevator had been removed, recovered and then installed by company maintenance personnel 166 flight hours prior to the accident. The pilot, sole on board, was killed.

The pilot and his passenger, his son, departed from a controlled airport at 1436 hours. He climbed the airplane to about 5,200 feet mean sea level. Recorded communications between the pilot and the control tower did not reveal anything out of the ordinary. Radar data showed the pilot in a progressive climb to about 5,200 feet. After maintaining that altitude for over two minutes, the airplane descended at an excessive rate until it collided with the ocean about one mile offshore. The engines and propellers were recovered and examined. The engine examination did not reveal any pre existing discrepancies. The propellers had deep leading edge gouges, 'S' twists, and one broken blade. No pre existing deficiencies were found during the examination of the airplane's logbooks and maintenance records. Investigation did not reveal any reason for the airplane's rapid descent and its in flight collision with the ocean. Both occupants were killed.

During the second ILS approach the airplane descended below the glidepath and impacted the terrain 2,500 feet short of the intended landing runway. The pilot indicated that a failure in the approach lighting system contributed to the accident. A post accident functional check of the approach lighting system failed to reveal any anomalies.

Witnesses reported seeing the airplane flying in a normal cruise attitude when it rolled inverted and the nose dropped near vertical to the terrain. The airplane descended in a near vertical dive. The nose of the airplane started to come up horizontal to the terrain when it struck a 75-ft tree. During the post crash investigation, no evidence of a mechanical failure or malfunction was found. Both occupants were killed.

The pilot supervised the loading of the airplane. According to info from a person that helped load the plane, the bill of loading, and actual weights and measurements of the cargo after the accident, the plane was loaded to a gross weight of 11,979 lbs with the cg 2.7 inches behind the aft limit. At the destination, the flight was vectored for an ILS runway 10 approach. About 3 miles from the runway, the pilot was told to make a missed approach due to inadequate separation from traffic. The pilot acknowledged, but soon thereafter, radar contact with the plane was lost. Witnesses saw the plane descend from a low cloud layer before it crashed. One witness said its wings were moving from side to side and the plane was falling faster than it was moving forward. There was evidence the plane had impacted in a flat attitude with little forward movement. Four cargo straps were found loose with no sign of tensile overload; 3 others and a restraining board were found loose as if they had not been used. No preimpact mechanical problem was found. The wind was from 090° at 21 gusting 32 kts. The pilot, sole on board, was killed.

The aircraft departed McChord AFB on an air refuelling mission over Montana. While cruising at an altitude of 25,000 feet by night, the aircraft collided under unknown circumstances with a second USAF Lockheed C-141B-LM Starlifter registered 66-0142, carrying six crew members and taking part to the same mission. Both aircraft entered an uncontrolled descent, disintegrated in the air and crashed about 14 km north of Harlem. All 13 occupants in both aircraft were killed.

The aircraft departed McChord AFB on an air refuelling mission over Montana. While cruising at an altitude of 25,000 feet by night, the aircraft collided under unknown circumstances with a second USAF Lockheed C-141B-LM Starlifter registered 65-0255, carrying seven crew members and taking part to the same mission. Both aircraft entered an uncontrolled descent, disintegrated in the air and crashed about 14 km north of Harlem. All 13 occupants in both aircraft were killed.

During a 2 hour and 40 minute training mission, the pilot maintained a low power setting with the fuel mix at full rich. After the mission, the pilot climbed the airplane to 9,000 feet agl to clear obstacles between his location and his destination. During the descent, the pilot said he reduced power more rapidly than usual and descended faster than normal at about 180 kias. About 800 to 1,000 feet agl, in the traffic pattern, the pilot applied power. Both engines lost total power. He set up an 85 kias glide; competed emergency procedures; and retracted the landing gear. The engines did not restart. He did not feather the propellers. He extended the landing gear prior to touchdown. The pilot said he did not flare the airplane during landing which resulted in the airplane colliding with the ground. The engine manual and the poh recommend adjusting the fuel mixture for cruise. An engine manual note states long descents at low power should be avoided because the engines may cool excessively and may not accelerate satisfactorily when power is reapplied. The poh recommends feathering propellers and gliding at 120 kias for dual engine failure. Soot was noted on all spark plugs during engine exam. Both engines started and ran normally from idle to full acceleration during the exam.