Human factor

The aircraft departed Fort Frances, Ontario, with the pilot and four passengers on a visual flight rules (VFR) flight to Granite Lake. The weather was overcast with good visibility on departure. However, about one-half of the way to Granite Lake, just north of Ignace, the pilot encountered an area of increasing rain and decreasing visibility. The pilot made several course deviations to find a route through the poor weather, but eventually could find neither a way out of the poor weather nor a lake with suitable conditions for landing. While manoeuvring at low level and with heavy rain obscuring the horizon, the pilot reported that the engines lost partial power because of carburettor icing. The pilot applied carburettor heat but was unable to restore engine power or sustain aircraft altitude. The pilot attempted to keep the aircraft level, and in a matter of seconds, the aircraft descended into the trees. The aircraft travelled approximately 500 feet through the trees; the left wing was torn off and a fuel-fed fire broke out almost immediately. All occupants survived the crash with minor injuries and exited the aircraft. The passenger occupying the copilot seat received burns to his upper body. The crash site was overflown about 15 minutes later by a second company pilot who transmitted a Mayday. The occupants were picked up by helicopter about one hour later

According to an FAA inspector, the airplane '...was unable to get airborne...' during the takeoff roll. He stated that after travelling the full length of the 4,997-foot runway, the airplane ran off the departure end of runway 5 and continued approximately 2,257 feet through an open field, a fence, a corn field and into a depression where it impacted terrain and came to rest. The pilot reported that during the takeoff roll he discovered that he had not removed the gust lock from the control column and that his attempts to remove it were unsuccessful. The pilot stated that the aircraft '...went off the end of the runway through a fence and impacted an earthen berm that collapsed the gear [and] blade strikes that stopped the engines.'

Twenty-three minutes after takeoff from Tynda Airport, while cruising at an altitude of 5,700 metres, the crew encountered technical problems with the engine n°2 (central engine). Due to an excessive temperature of the turbine, the captain decided to shut this engine down (the engine n°2 is equipped with a thrust reverser system). While descending to Aldan Airport, the aircraft approached in a nose down attitude and struck the ground 90 metres short of runway threshold with a positive acceleration of 4 g. On impact, the nose gear collapsed, the aircraft bounced several times then slid for 800 metres before coming to rest on the runway. All 11 occupants evacuated safely while the aircraft was damaged beyond repair.

The crew was engaged in a local training flight at Yamoussoukro Airport. Following several circuits, the crew was cleared to descend from 3,000 to 1,000 feet for a new instrument approach. In limited visibility due to foggy conditions, the aircraft descended below de MDA then struck trees and crashed in a prairie located near Bouaflé, about 40 km northwest of Yamoussoukro Airport. All three pilots were killed.

On approach to Cafunfo Airport, following an uneventful cargo flight from Luanda, the crew encountered bad weather conditions with thunderstorm. On short final, the pilot reported a minor technical problem with the left engine and initiated a go-around procedure. Shortly later, the aircraft stalled and crashed short of runway, bursting into flames. Four crew members were killed and four others were injured.

Following an uneventful flight from Dalian, the crew started the descent to Shanghai-Hongqiao Airport in limited visibility due to marginal weather conditions. While completing a last turn to join the approach path, the twin engine aircraft crashed on the top of a hill located about 3 km short of runway. A pilot and a passenger were killed while 10 other occupants were injured.

During initial takeoff climb the copilot who was manipulating the controls called for METO (maximum except takeoff) power. After the pilot-in-command set METO power, the left engine lost power. The PIC took the controls from the copilot and called for him to feather the left propeller. The copilot did not hear the call to feather the left propeller. Maintaining an indicated airspeed of 90 knots and wings level attitude, the airplane descended into trees and impacted a rural residential paved street. The cockpit area and main fuselage were consumed by a post crash fire. Examination of the throttle quadrant revealed the propeller control levers were forward, the mixture control levers were autorich, the throttle for the right engine was forward, and the throttle for the left engine was at idle. According to a FAA operations inspector maintaining 90 knots with the propeller not feathered would result in the aircraft descending. The pilot and copilot had not completed a proficiency check or flight check for the DC3 type aircraft within the previous 24 months. Examination of the left engine did not disclose any preexisting anomalies.

The crew was completing an executive flight from Kaduna to Jos, carrying four crew members and eight passengers, among them Colonel Mohammed Wase. On approach to Jos Airport, the crew encountered limited visibility due to marginal weather conditions when the aircraft collided with a telecommunication antenna and crashed, bursting into flames. The aircraft was totally destroyed and all 12 occupants were killed.

The parents of the pilot/owner stated that he arrived late in the afternoon prior to the accident. They stayed up with their son until approximately 0100 the morning of the accident. They stated that their son was a doctor and kept a busy schedule. The son told the parents that he had to fly back in order to have new fuel cells installed in the airplane and to work at his clinic. The pilot was airborne by 0700. The weather at his destination had low ceilings and fog restricting the visibility. The pilot was cleared by ATC to fly the localizer approach to the runway. The pilot called his position at the outer marker on the unicom frequency and no further transmissions were heard. Witnesses on the airport heard and saw the bottom of the airplane and stated that the airplane's engines sounded normal as it went overhead. Radar data showed that the airplane's altitude fluctuated and ground speed decreased significantly during the missed approach flight path. The airplane impacted the ground in approximately 40- degree nose-low, right wing down attitude. The toxicology report revealed 0.005 ug/ml Tetrahydrocannabinol (Marihuana) in the blood, and 0.013 ug/ml and 0.017 ug/ml Tetrahydrocannabinol Carboxylic Acid (Marihuana) in the blood and kidney fluid respectively.

The crew was completing a spraying mission near the village of Gorkaya Balka, about 10 km northeast of Zelenokumsk, Stavropol krai. While cruising at low height, the aircraft collided with high voltage power line and crashed in a field, bursting into flames. Both pilots were killed.