Executive/Corporate/Business

On final approach, after being cleared to land, the pilot informed the controller that he might have to shut down an engine. He declined to declare an emergency or request assistance. On short final, the aircraft was observed to roll to the left and descent into the terrain. Subsequent examination revealed evidence that the left engine was not developing power, although the left propeller was not feathered. There was evidence that the right engine was producing high power during impact. No mechanical deficiency of the left engine or propeller was found. The pilot, sole on board, was killed.

At about 1744 cst, before reaching his destination, the pilot reported that during the flight, he had encountered head winds and had only 50 minutes of fuel remaining. He was provided preferential handling, but another flight was also low on fuel. The pilot was cleared for an NDB runway 15 approach. At 1756:49, he acknowledged clearance for the approach. At approximately 1800, unicom advised the current weather was: 700 feet broken, sky obscured with heavy rain, wind variable from 090° to 240° at 24 gusting 29 knots. The pilot did not acknowledge the weather, except to saying a calm voice, 'I hope you have your lights on.' The FBO heard several clicks on the unicom (as if to activate the runway lights), then there was no further radio contact with the aircraft. The aircraft hit trees and crashed about 6 miles west-northwest of the airport. Witnesses reported it was at low altitude and had reversed course before crashing on a southerly heading. The main wreckage came to rest about 380 feet from the initial impact point with trees. No preimpact part failure/malfunction was found. About 42 miles south-southeast at Lufkin, the 1751 cst weather was in part: 200 feet overcast, visibility 3/4 mile with thunderstorms, heavy rw and fog, wind from 020° at 12 knots. Approach minimums: 600 feet cig and 1 mile visibility. All five occupants were killed.

After landing, the twin engine aircraft went out control, veered off runway and collided with trees. All 13 occupants evacuated safely and the aircraft was damaged beyond repair.

Shortly after takeoff, the aircraft was seen flying low over trees, followed by a rapid roll to the left and a collision with wooded terrain. One witness reported seeing gray smoke trailing the left engine before the crash. An inspection of the wreckage revealed the left engine spark plugs were black and heavily sooted. Neither propeller had been feathered before the accident. The landing gear was found in an extended position. Further investigation revealed that Cessna multi-engine service bulletin (SB) 88-3 was not complied with. This SB modified the fuel system to provide for direct pilot (rather than automatic) actuation of the output pressure of the auxiliary fuel pumps. Both engines ran satisfactorily on a test stand following the accident. No other evidence of mechanical failure or malfunction was found. All three occupants were killed.

The pilot was cleared for an approach to the airport. He received airport advisories from the airport unicom operator and asked that the runway lights be turned up. Soon afterwards, the airplane was seen approaching runway 23, which was served by a localizer approach. A witness at the airport said he saw the plane flying in and out of low hanging clouds. He said the airplane appeared to be at level flight, about 400 to 500 feet agl, then it passed over the airport and went in a steep left turn. After about 90° of turn, the airplane began a shallow descent. It rolled out of the turn before it descended into the ground about 1/4 mile from the approach end of runway 28. The witness said he heard engine sounds throughout the descent. An examination of the airplane did not disclose evidence of mechanical malfunction. A post-mortem examination did not reveal evidence of impairment or incapacitation of the pilot. The pilot, sole on board, was killed.

The passengers and witnesses reported that during takeoff, the aircraft yawed both left and right after lift-off. It then veered to the left and contacted the ground in a left wing low attitude between the runway and a parallel taxiway. An investigation revealed evidence that the left engine had sustained a partial loss of power due to a malfunctioning fuel pump. There were indications the power loss was not sufficient to trigger or allow completion of the autofeathering operation of the left propeller. Feathering of the left propeller had been manually initiated, but the propeller had not reached the feather position before impact. Manual feathering operation required the feathering pump button be held about 5 sec. 'V' speeds (kias) for this flight were: V1 92, VR 99, V2 110, normal VMCA (dead engine propeller feathered, flaps set for takeoff and aircraft out of ground effect) 101, VMCA (dead engine propeller unfeathered/windmilling and flaps set for takeoff) 127 knots. Exam of the actuators revealed the gear was retracted and the flaps were set for takeoff. Both pilots and a passenger who was seating on the jumpseat were killed.

During IFR departure, pilot received progressive altitude clearances to climb to 15,000 feet. At 1607 edt, he was vectored for 'a good rate of climb' thru 14,000 feet with clearance to proceed on course after leveling 14,000 feet for 15,000 feet. Radar data indicated a steady climb til aircraft was above 13,000 feet. As it climbed from 13,300 feet to 13,900 fet (max recorded altitude), its speed slowed from about 115 knots to below 80 knots. At 1613 edt, pilot was cleared to proceed direct and change frequency. Radar data showed that after reaching 13,900 feet, aircraft deviated from course and entered steep descent. Radar contact was lost and inflight breakup occurred. Pieces of wings and stabilizers were found up to 1.5 mile from fuselage. Trajectory study disclosed breakup occurred between 6,000 feet and 9,000 feet msl. Exam of fractures on major components revealed characteristics typical of overstress; no preexisting cracks were found. No autopilot failure or bird strike was found. Clouds were layered to 20,000 feet; freezing level was about 12,500 feet. There was evidence aircraft was in or near convective precipitation above freezing level for about 1.5 minute before rapid descent. Found Pitot heat switch 'off' and induction air door in its primary position. The pilot, sole on board, was killed.

The approach to Manaus-Eduardo Gomes was completed in heavy rain falls. On short final, the crew failed to realize his altitude was too low when the aircraft struck an element of the approach light system and crashed 200 meters short of runway, bursting into flames. All seven occupants were killed.

The pilots were making an NDB approach to an uncontrolled airport that was 941 feet msl. The NDB was 1.8 nm from the airport, and the pilots were supposed to maintain minimum descent altitude (MDA) of 1,540 feet until the runway was in sight. Prior to the crash, ATC had told them that they were 15 miles from the airport. Approximately four miles from the airport, the airplane impacted the top of a hill, at a point 990 feet msl. The airplane was demolished by impact and post impact fire. The weather was estimated to be 300 feet overcast and one mile visibility. No mechanical malfunctions were reported or discovered. The lack of a local altimeter setting increased the mda by 240 feet.

Before takeoff, San Angelo AFSS briefer told the pilot computers were down in south Texas for 1.5 hours and no current weather info was available. Current weather info was available at nws at Midland and FSS's at Midland, McAlester and De Ridder, but the pilot didn't call these, nor did the briefer advise him to do so. Pilot didn't update weather in flight. About 38 minutes after takeoff, in area of potential icing, aircraft slowed from 270 to 150 knots ground speed in 4 minutes, then slowed to 100 knots in next 12 seconds. About 33 seconds before reaching 100 knots, pilot requested descent from 15,000 feet to 13,000 feet. At that time, true ground track was approximately 080° with wind aloft about 213° at 43 knots. Before ATC could clear descent, aircraft descended to 14,800 feet, then radar contact was lost after one return at 9,700 feet. Descent rate between last 2 altitudes: 12,750 fpm. No preimpact malfunction was found. IMC existed above 12,500 feet. Freezing level was forecasted at 10,000 feet to 12,000 feet. Aircraft was certified for flight in known icing conditions, but status of anti-ice/deice equipment wasn't determined due to impact/fire damage. Low levels of ethanol were found in tox samples from all occupants; however, there was evidence that the tox samples were unreliable. All five occupants were killed.