Takeoff (climb)

The pilot took off from a 4400-foot-long gravel airstrip with a near gross weight load of cargo. He said that shortly after lift-off the airplane felt 'sluggish', and he believes the left engine began to lose power. He said the airplane would not climb, and he elected to bring both engines to idle and land on the remaining runway. The airplane touched down a short distance from the end of the runway, and continued off the end and into the woods. A fire erupted, and the airplane was destroyed by fire. The pilot is unsure if the fire occurred in the air, or shortly after the airplane went off the end of the runway. The engines were extensively damaged by fire, and were not examined. FAA inspectors on scene said there was no obvious signs of catastrophic engine failure.

During the takeoff roll un runway 31 at Bogotá-El Dorado Airport, at a speed of 130 knots, the crew heard two explosions. As the aircraft started to vibrate, the captain decided to abandon the takeoff procedure and initiated an emergency braking manoeuvre. Unable to stop within the remaining distance, the aircraft overran, rolled for 497 metres then lost its nose gear and came to rest. All six occupants escaped uninjured while the aircraft was damaged beyond repair.

The aircraft concluded an aerial survey and landed at Brown Field to clear U.S. Customs. On restart, as the left engine began running, a witness noticed two short, yellow flame bursts exit the exhaust. During taxi, the witness heard a popping sound coming from the aircraft. As power was applied to cross runway 26L, the sound went away. The aircraft stopped for a few seconds prior to pulling onto the runway; the witness did not observe or hear a run-up. Witnesses reported hearing a series of popping sounds similar to automatic gunfire and observed the aircraft between 600 and 1,000 feet above the ground with wings level and the landing gear up. The aircraft was observed to make an abrupt, 45-degree banked, left turn as the nose dipped down. Witnesses reported the nose of the aircraft then raised up toward the horizon. This was followed by the aircraft turning to the left and becoming inverted in an estimated 30-degree nose low attitude. With the nose still low, the aircraft continued around to an upright position and appeared to be in a shallow right bank. Witnesses then lost sight of the aircraft due to buildings and terrain. A May 20, 1997, work order indicated the left manifold pressure fluctuated in flight. Both wastegates were lubricated and a test flight revealed the left engine manifold pressure lagged behind the right engine manifold pressure. On June 18, 1997, the left engine differential pressure controller was noted to have been removed and replaced. This was the corrective action for a discrepancy write up that the left engine manifold pressure fluctuated up and down 2 inHg and the rpm varied by 100 in cruise. A test flight that afternoon by the accident pilot indicated the discrepancy still occurred at cruise power settings, but the engine operated normally at high and low power settings. Post accident functional checks were performed on various components. No discrepancies were noted for the left governor. The left engine differential pressure controller was damaged and results varied on each test. The left density controller was too damaged to test. The right engine density and differential pressure controllers tested satisfactory. The left and right fuel pumps operated within specifications. Both fuel servos were damaged. One injection nozzle on the left engine was partially plugged; all others flow tested within specifications.

After takeoff from Tula Airport, while climbing, the crew noticed that the engine oil temperature increased while the engine pressure dropped. In such conditions, the captain decided to return to Tula Airport for an emergency landing and completed a turn when the engine failed. The aircraft lost speed and height then struck power cables and crashed. The captain and three passengers were killed while three other occupants were injured. The aircraft was destroyed.

After takeoff from Bunia Airport, the captain informed ATC about engine problems and reported fire in the cabin. Shortly later, the four engine aircraft went out of control and crashed about 40 km southwest of Bunia, in the region of Irumu. All 23 occupants were killed.

Shortly after takeoff from Jacobina Airport, while in initial climb, the left engine lost power. The crew initiated a sharp turn to the left when the aircraft lost height, struck an electric pole and crashed near the runway end. The aircraft was destroyed and all four occupants were killed.

The crew was completing a crop spraying mission on behalf of the the collective farm 'Dimitrova' in Novoshcherbinovskaya. After takeoff, while climbing to a height of 10 metres, the engine lost power. The captain attempted to make an emergency landing when the aircraft struck the ground, nosed over and came to rest upside down, bursting into flames. Both occupants were slightly injured and the aircraft was destroyed.

During the initial climb after takeoff, while executing a dark-night departure, the pilot failed to maintain clearance from rising terrain about one and one-quarter mile off the end of the runway. Operator records indicated that the pilot had flown out of this airport in the past, and that the aircraft was approximately 600 pounds below maximum certificated gross weight at the time of departure. A teardown inspection of both engines revealed no pre-impact anomalies, and visual and teardown inspections of the propellers showed damage signatures consistent with ground contact in a flat pitch under significant power.

Shortly after takeoff from Saskatoon, while in initial climb, the single engine aircraft nosed down and crashed, bursting into flames. The pilot, sole on board, was seriously injured and the aircraft was totally destroyed by impact forces and a post crash fire.

The captain reported: 'Shortly after V1...there was a loss of power to the left engine....' (FAR Part 1 defines V1 as takeoff decision speed.) However, the first officer, who was the pilot flying, stated the captain retarded power on the left engine as a training exercise. The first officer stated there was no preflight discussion of emergency procedure practice. The airplane became airborne about 3,500 feet down the runway; the crew subsequently lost control of the aircraft, and it crashed to the left of the runway, and a fire erupted. The crew escaped with minor injuries. A teardown of the left engine was performed under FAA supervision at the engine manufacturer's facilities; the engine manufacturer reported that damage found during the teardown 'was indicative of engine rotation and operation at the time of impact....' Both airspeed indicator bugs were found set 9 to 11 knots below the V1 speed on the takeoff and landing data (TOLD) card. No evidence of an aircraft or engine malfunction, to include inflight fire, was found at the accident site.