Takeoff (climb)

During the takeoff roll, one of the engine failed. The pilot abandoned the takeoff procedure and initiated an emergency braking maneuver. Unable to stop within the remaining distance, the aircraft overran and came to rest. The pilot, sole on board, was uninjured while the aircraft was damaged beyond repair.

The aircraft collided with the ground during takeoff. The fuel tank in the right wing ruptured and the aircraft burned while sliding to a stop. The day before the accident the aircraft was washed and the thrust reverser doors were polished. After the service, the reverser doors circuit breakers which had been pulled were not reset. It was company policy to leave circuit breakers out that were pulled during servicing. Prior to flight, the aircraft was loaded and the engines started. The reversed unlock lights on both reverser annunciator panels illuminated. The pilot discussed the situation with the copilot and elected to go. He pushed the light assemblies which unlatched the light housing and put out the 'unlock' lights. After takeoff while the gear was retracting the aircraft yawed right and impacted the ground. All occupants evacuated and after the fire was put out a Cessna Aircraft investigator observed the two thrust reverser circuit breakers in the 'out', open position and partially covered by a flight chart. Both thrust reversers were deployed.

The crew was completing a local 'training' flight consisting of a preparation to an incoming airshow. After completing several circuits with other airplanes, the crew initiated a solo low pass over the runway at a height of 100 feet and a speed of 65 knots. While approaching the end of the runway, the pilot-in-command initiated a right turn when the seaplane adopted a nose-high attitude then stalled and crashed on a concrete bank separating the tarmac and an ammunition storage building. Three occupants were seriously injured while 11 others were killed.

After takeoff from Khartoum-Haj Yusuf Airport, while in initial climb, the right engine failed. The crew declared an emergency and was cleared to return for an emergency landing. While completing a turn, the airplane lost height and crashed in a district located about 4 km southeast of the airport. The aircraft and several buildings were destroyed. The flight engineer was seriously injured while eight other occupants and nine people on ground were killed. Eight other people on the ground were injured as well.

The pilot stated that start, taxi and takeoff were normal until after he raised the gear handle and the aircraft was climbing thru approximately 150 to 200 feet agl. At that time, he noticed that the left engine rpm was decaying. There was insufficient runway remaining to abort, so he elected to feather the left engine and continue the takeoff. The left prop stopped rotating before it feathered. With additional drag from the left prop, the aircraft would not climb or maintain level flight. The pilot was able to fly the aircraft over buildings and other obstacles (up to 75 feet tall) near the airport boundary. Just beyond these obstacles, the aircraft struck trees and crashed in a wooded area. There was a small post-impact fire near the accessory section of the right engine. An exam and teardown of the left engine revealed that an impeller shaft bearing, Pratt & Whitney part number 288943, had failed and allowed the impeller to rub against the diffuser. No other preimpact failures were found. The pilot, sole on board, was slightly injured.

Four minutes after takeoff from Guangzhou-Baiyun Airport, while climbing, the twin engine airplane went out of control and crashed few km from the airport. All eight occupants were killed, five French citizens and three Chinese.

14 seconds after liftoff from runway 10 at Poti Airport, while climbing to a height of 60 meters at a speed of 195 km/h, both engines lost 60% of power. While the power on the left engine increased to 94,5% 11 seconds later, the power on the right engine dropped to zero. The crew elected to feather the right propeller but this was not possible. The airplane lost height, started a descent and slightly turned to the right when, at a speed of 130 km/h, it struck 20 meters high trees and crashed in a wooded area located 450 meters past the runway end. Two pilots and four passengers were killed while 12 other occupants were injured. The aircraft was destroyed.

After takeoff from Sebha Airport, while climbing, one of the engine caught fire. The crew lost control of the airplane that crashed in a desert area located about 30 km north of the airfield, bursting into flames. All five occupants were killed.

The crew (one pilot and one instructor) was engaged in a local training flight at Manaus-Eduardo Gomes Airport. After a simulated asymmetrical power takeoff, the airplane encountered difficulties to gain sufficient height. The crew increased engine power but the airplane stalled and crashed in a wooded area located few km from the airfield, bursting into flames. Both pilots were killed. It is believed that the aircraft was on its way to São Paulo Airport, carrying a load of televisions.

While taking off, the aircraft climbed approximately 100 to 200 feet, then began loosing altitude. During a forced landing on a street, it hit a parked car and a light pole and burst in flames. The pilot, who later expired, said that neither engine developed full power (2575 rpm). He said this was not unusual when power was 1st applied, but said full rpm was generally obtained shortly after the roll was begun. After being committed for takeoff, both rpm's were reportedly between 2,300 and 2,400 rpm. Several witnesses stated the engines sounded like they were running rough. A witness reported the aircraft swerved 'as tho the pilot had difficulty with the left engine.' Reportedly, the pilot 'dropped some more flaps' below the 20° takeoff setting 'in order to pull it off' and raised the gear immediately after liftoff. Engine teardowns revealed excessive spark plug gaps, 1 magneto on the right engine had a .008 point gap (.016 required), its #1 and #4 distributor blocks were cracked and the #1 and #6 leads would not fire properly. Hartzell f-6-5a prop governors installed in place of f-6-35a. Aircraft was approximately 348 lbs over max weight limit. All five occupants were killed.