User:Whoop whoop pull up/Transwestern Airlines Flight 868
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 A Sierra Pacific DHC-6 similar to the accident aircraft. | |
| Accident | |
|---|---|
| Date | 15 February 1983 |
| Summary | Loss of elevator control due to poor maintenance |
| Site | 1.7 miles south of Friedman Memorial Airport, Hailey, Idaho |
| Aircraft | |
| Aircraft type | De Havilland Canada DHC-6-300 Twin Otter |
| Operator | Sierra Pacific Airlines |
| Registration | N361V |
| Flight origin | Boise Airport, Boise, Idaho |
| Destination | Friedman Memorial Airport, Hailey, Idaho |
| Occupants | 8 |
| Passengers | 6 |
| Crew | 2 |
| Fatalities | 0 |
| Injuries | 8 |
| Survivors | 8 |
Transwestern Airlines Flight 868 was a scheduled U.S. passenger flight from Boise to Hailey, Idaho, operated by Sierra Pacific Airlines under contract to Transwestern Airlines. On 15 February 1983, the De Havilland Canada DHC-6 Twin Otter operating the flight crash-landed on Idaho State Highway 75[a] following a loss of elevator control resulting from improper maintenance, destroying the aircraft and injuring all eight occupants of the aircraft, seven of them seriously.[1]
Accident
[edit]Flight 868 took off from runway 10L at Boise at about 1020 Mountain Standard Time,[b] and the flight proceeded uneventfully to the vicinity of Hailey at a cruising altitude of 9,500 feet above mean sea level (AMSL).[1] At around 1100, while descending through 6,000 feet AMSL (about 700 feet above ground level) over the town of Bellevue, two miles south of Friedman Memorial Airport, the captain, in accordance with the standard arrival procedure for a landing on runway 31, reduced engine power to slow his plane in preparation for landing.[1] Normally, the nose-down pitching moment produced by the reduction in engine power and airspeed would by easily countered using the aircraft's elevators. However, when the captain of Flight 868 reduced power, he found himself unable to arrest the aircraft's pitchdown, with the control column moving throughout its range of travel with neither appreciable resistance nor appreciable elevator response.[1]
Investigation
[edit]See also
[edit]- Air Moorea Flight 1121, another DHC-6 crash caused by loss of elevator control
Notes
[edit]- ^ The NTSB report describes the crash-landing as having occurred on U.S. Highway 75, but U.S. 75 is located far to the east and never enters Idaho, whereas ID-75 passes through Hailey on a north-south alignment; the mention of U.S. 75 is presumably a typo for ID-75.
- ^ The NTSB's official accident report does not give the precise time that Flight 868 took off, but it does state that the flight received takeoff clearance at 1019:56 and that Boise departure control established radar contact with the flight at 1021:47, indicating that Flight 868 took off at some point in the intervening interval.[1]
References
[edit]
This article incorporates public domain material from websites or documents of the National Transportation Safety Board.
- ^ a b c d e "Sierra Pacific Airlines, DeHavilland DHC-6-300, N361V, Hailey, Idaho, February 15, 1983" (PDF). National Transportation Safety Board. 6 March 1984. Archived from the original (PDF) on 6 August 2021. Retrieved 5 August 2021.
External links
[edit]- NTSB report on the accident (summary, PDF)
- Accident description at the Aviation Safety Network (archive)
Category:Airliner accidents and incidents caused by maintenance errors
Category:Aviation accidents and incidents in 1983
Category:Airliner accidents and incidents in Idaho
Category:Accidents and incidents involving the de Havilland Canada DHC-6 Twin Otter