West Air Sweden Flight 294
| West Air Sweden Flight 294 | |
|---|---|
_AN0955911.jpg) The aircraft involved in the accident in October 2005 was still in service with Lufthansa CityLine |
|
| Accident summary | |
| Accident type | Pilot error, technical failure |
| place | Near Akkajaure reservoir
|
| date | January 8, 2016 |
| Fatalities | 2 |
| Survivors | 0 |
| Aircraft | |
| Aircraft type | Bombardier CRJ200PF |
| operator | West Air Sweden |
| Mark | SE-DUX |
| Departure airport |
 Oslo Airport Gardermoen
|
| Destination airport |
Tromso Airport
|
| crew | 2 |
| Lists of aviation accidents | |
The West Air Sweden Flight 294 (short PT294 ) was a cargo flight of the Swedish cargo carrier West Air Sweden from Oslo Gardermoen to Tromsø . The flight was performed on January 8, 2016 by a Bombardier CRJ 200PF . The plane with two pilots on board crashed near the Akkajaure reservoir in northern Sweden . Both pilots were killed.
plane
The plane that crashed was delivered to Lufthansa CityLine on February 2, 1993 as the Bombardier CRJ100ER and had the aircraft registration D-ACLE. In 2006 it was modified to the CRJ200 series, then converted to the CRJ200PF freighter in 2007 and sold to West Air Sweden, where it was registered as SE-DUX. The CRJ had already completed a total of 38,600 flight hours and was equipped with two General Electric CF34 engines.
crew
The only occupants were the 42-year-old Spanish captain and the 33-year-old French first officer. Both had completed around 3000 flight hours each.
Flight history
The plane took off on January 7 at around 11:10 p.m. local time with two pilots from Oslo-Gardermoen Airport . The freight machine was on the move on behalf of the Norge Post and was loaded with around 4,500 kg of mail and parcels. After takeoff, the machine rose to an altitude of 33,000 feet (approximately 10,000 meters). According to Flightradar24 , the plane began a steep dive at 12:18 a.m., during which it fell from 33,000 feet to 11,700 feet (about 3500 meters) in just one minute. Shortly thereafter, the machine hit the ground almost vertically between the Swedish Akkajaure reservoir and the Norwegian border. According to a spokesman for the Norwegian rescue coordination center, the pilots made an emergency call shortly before the crash.
search
After the machine disappeared, two F-16 fighter planes of the Norwegian Air Force searched for the wreckage of the machine, which was discovered at 3:09 a.m.
The severely damaged flight data recorder and parts of the destroyed voice recorder (without a memory unit) were found on January 9th. On January 10, the remaining parts of the voice recorder were found.
Investigations
Several Swedish and Norwegian helicopters were sent to the crash site, according to the Swedish Maritime Authority. At the time of the crash, adverse weather conditions and icy temperatures prevailed.
On March 9, 2016, the Swedish SHK published an interim report. According to the report, 3.5 t of aircraft fragments and 1 t of cargo were seized. According to the data from the flight recorder and the recordings from the voice recorder, the flight proceeded without any special incidents until 80 seconds before the impact. After 70 minutes, during the discussion of the landing approach, the master uttered a swear expression and the warning signal for the deactivation of the autopilot sounded immediately afterwards for 18 seconds. According to the flight data recorder, after moving the elevator accordingly, the aircraft began a rapid descent with a negative acceleration of up to −1 g . The trim of the horizontal stabilizer was changed from −0.9 ° (climb) to 1.7 ° (descent) by the pilot. As a result of the resulting strong descent, the aircraft's maximum speed (VMO) of 583 km / h (315 knots) was exceeded 17 seconds after the start of the incident. The trim of the horizontal stabilizer was reduced again in the further course and an attempt was made to pull the aircraft up again at acceleration values of up to 3 g . At the time of impact the speed was 940 km / h.
When evaluating the data recorder, several implausible parameters were identified that cannot be explained by the movements of the aircraft and physical conditions. One of the most important implausible parameters was the pitch angle (angle between the longitudinal axis of the aircraft and the surface of the earth), which according to the recording increased from 0 ° to 85 ° within 20 seconds from the beginning of the incident, which would correspond to an almost vertical climb. Using the available data, the SHK calculated the real pitch angle, which was reduced from 0 ° to 45 ° descent within 20 seconds by the pilots' measures. After the displayed pitch angle reached the maximum value, the displayed pitch angle was reduced again and later also reached negative values.
The final report was published on December 12, 2016. The implausible parameters before the crash were attributed to a malfunction of one of the redundant inertia measuring devices. The lack of organizational precautions in the event of the failure of such redundant flight instruments was named as the reason for the crash. The SHK also specifies as one of the possibly contributing factors the large negative acceleration forces during the descent initiated by the pilots in response to the incorrect display, which could have impaired the pilots.
Individual evidence
- ↑ a b Final report of the Swedish Accident Investigation Authority (English) , accessed on December 12, 2016
- ^ Accident report SE-DUX, Aviation Safety Network (English) , accessed on January 8, 2016.
- ↑ Sydsvenskan, January 8, 2016: Flygkraschen i fjällen ett mysterium (Swedish) , accessed January 9, 2016.
- ↑ Aviation Herald: Crash: West Atlantic Sweden CRJ2 (English) , accessed on January 8, 2016th
- ^ Swedish Accident Investigation Authority: Investigations - Accident in the arctic north of Sweden to a Canadair CRJ 200 aircraft (SE-DUX ) , accessed on January 10, 2016.
- ↑ Haverikommission Preliminary Report of Statens. Statens haverikommission, March 9, 2016, accessed on March 26, 2016 .