United States of America

At 0515 est, the flight was cleared for takeoff on a flight from Ypsilanti, MI to Louisville, KY. About 17 minutes later, the flight crew began to display indications of a deterioration of their ability to control the aircraft. At 1st, they deviated from instruments to hold west of the Findlay VOR at FL220. As the flight continued and was cleared to FL270, the crew displayed confusion about magnetic headings and basic instruments. At 1048 est, the aircraft deviated from the en route heading and the wrong heading was read back after a heading correction was given. Also, the aircraft continued climbing (to FL291), then radar and radio contact were lost at 0551 est. The controller noted the pilot's speech was slurred and some portions of the conversation were unintelligible. Subsequently, the aircraft crashed in a steep dive. No preimpact part failure was verified, though impact forces and post-crash fire resulted in extensive damage of the aircraft. The aircraft was equipped with oxygen and pressurization system. No audible warning was noted on ATC recordings to indicate the cabin altitude had exceeded 10,000 feet, though the aircraft was equipped with such a device. Both pilots were killed.

PM Air flight 824, a Federal Express scheduled domestic cargo flight, departed Denver, CO, at 0642, IFR to Montrose, CO. Flight was cleared to FL180, but pilot cancelled IFR at 0653. Radar showed aircraft leveled off at 14,500 feet on southwest heading. Aircraft maintained relative constant altitude and heading before crashing 50 feet below summit of 14,221-feet Mt Massive, second tallest peak in Colorado, at approximately 0719. Weather was cavu. Toxicological tests revealed marijuana metabolite level of 37 ng/ml in urine and 1 ng/ml in blood. Pilot was once convicted in 1974 for possession of controlled substance, but had no other alcohol/drug convictions. Evidence indicates pilot obtained adequate sleep prior to flight. During autopsy, two pages from airmen's information manual were found clutched in plt's hands. The pilot, sole on board, was killed.

While level after descending, the right engine quit. Pilot feathered the propeller, advised ATC, and was diverting to alternate when left engine quit. He positioned the left engine boost pump to high and low with negative results, but did not feather the propeller. Position of boost pumps, when engines quit, was not determined. Aircraft landed on overpass that was under construction. There was fuel leakage after accident due to aircraft damage. Fuel quantity was sufficient. Examination of aircraft revealed right engine flexible duct from turbocharger to plenum chamber separated due to loose clamp. Hose was installed and club prop installed for each engine run. Both engines operated normally. Induction air hose was pulled during right engine run. Engine ran rough due to excessive rich mixture. No determination could be made for the reason of the left engine power loss.

The on-demand air taxi airplane collided with trees and terrain during a third attempt at an ILS approach. The airplane crashed approximately two miles beyond the airport on the extended centerline of the landing runway. In an interview the pilot related that on his first approach to the airport he saw the runway and observed vehicles on the taxiway as he performed his missed approach. When he was asked the reason for the second missed approach he said it was because of instrument fluctuations on his course direction indicator. During this period he asked that the lights be set to high intensity because he could not see them. The lights were verified as being set for high intensity. He did not remember anything of the third approach after he passed the outer marker. Snow removal operations were in progress during the period the accident airplane was making approaches to the airport.

The pilot received numerous weather briefings/updates before takeoff, which included two pilot reports of windshear by aircraft on the approach into Appleton. Shortly after takeoff convective sigmet 1E was transmitted by the radar controller on the same frequency he was working N87163. This sigmet called for embedded thunderstorms. About 10 minutes later, while being vectored for the approach into Appleton, the pilot was given heading deviations because of weather. The aircraft crashed 1/2 mile from the approach end of the runway. A witness whose residence is located between the OM and MM for the ILS approach reported a 'huge downpour' with 'very strong winds' at the time of the accident. Wreckage examination revealed that all power controls for both engines were in the full forward position, and that the left and right main landing gear mounting trunnions were displaced upward into the wing fuel tanks. The pilot, sole on board, was killed.

During arrival, the flight crew of SkyWest Airlines flight 5855 requested a VOR/DME-B approach to the Elko Airport, which was approved. As the approach continued, the flight crew reported over the Bullion VOR. Approximately 30 seconds later, the aircraft crashed. Impact occurred at the top of a mountain, about 100 feet before reaching the VOR station. Elevation of the crash site was about 6,460 feet; minimum published crossing altitude at the VOR was 7,000 feet. The airport was 4.1 miles from the VOR at an elevation of 5,135 feet.

While parked at Pease AFB and under maintenance, the aircraft suffered several explosions and caught fire. Two mechanics evacuated safely and the aircraft was destroyed by fire. It is believed the aircraft caught fire as it was being prepared for refueling and had a little fuel on board.

Flight was a 3-engine ferry with the #4 engine shut down. During takeoff roll at V1 the #2 engine overheat light came on. According to the copilot the pilot reduced throttle slightly and continued the takeoff. After lift-off the pilot aborted the takeoff. The airplane could not be stopped on the remaining runway and collided with antennas, approach lights and a construction site 1,180 feet from the departure end of the runway. Postcrash exam of the 3 operating engines did not reveal any evidence of mechanical failure or malfunction. A failed resistor was found in the #2 engine electronic engine control (eec). This would cause the unit to over-schedule fuel to the engine resulting in hotter engine operating temperatures. Retarding the throttle would reduce fuel flow to within normal ranges for engine operation. Under conditions that existed at the time of the accident, the airplane would have a 3-engine rate-of-climb of 1,398 fpm, and a 2-engome rate-of-climb of 350 fpm. The captain was killed while the copilot was seriously injured.

During approach, a fire erupted in the wheel well of the 22-year old airplane. The fire burned thru the hydraulic lines rendering the a, b, and standby hydraulic systems inoperative. The crew landed the airplane using the emergency manual reversion flight control system. However, the airplane was unable to stop on the runway because of the previous failures of the check valves in the backup hydraulic accumulator pressure systems for the #2 thrust reverser and the inboard pair of wheel brakes. During the 2 minutes rollout, the airplane traversed 14,000 feet, overran the runway end, and collided with a concrete structure which collapsed the nose gear. The airplane had recently undergone a 'C' check during which the operator's mechanics failed to observe and repair an electric wire which had been chafing against a hydraulic line. On the accident flight the energized wire arced, punctured the line, and ignited the escaping hydraulic fluid. The hydraulic check valves had failed earlier due to mechanical wear.

The pilot departed on a local VFR flight at 1117. At 1154 he contacted Erie tower for landing. He then advised the tower at 1159 that he had feathered the right engine. One minute later he reported that the left engine was '...kicking out.' The aircraft stalled into a house 6 miles from the airport, and just short of the shoreline of Lake Erie. No fuel was found in the right wing. 7 gallons were drained from the left wing; no fuel was found in the left engine. Right fuel quantity c/b secured in out position by wire tie; several burned components found on back of right fuel quantity gage pc board. Most recent record of fuel purchase which could be found was for May 25, 1989. A pocket diary was found in the wreckage which contained entries of flight times and fuel quantity notations. The accident occurred at 155 Euclide Avenue, Erie, about six miles east of runway 24 threshold. Both occupants were killed.
Pilot:
Floyd E. Smith.
Passenger:
Elwood Graham.