Narrative:The aircraft was on a flight from Chengdu to Wenzhou and was approaching Wenzhou when, at 1000m, the flaps were extended. At that moment, the aircraft suddenly pitched down and dove into the ground out of control. The Tupolev crashed into a farm field and exploded, causing a 200x100 feet hole in the ground. Several farmers were injured by the flying debris.
|Date:||Wednesday 24 February 1999|
|Operator:||China Southwest Airlines|
|C/n / msn:|| 90A-846|
|First flight:|| 1990|
|Total airframe hrs:||14135|
|Engines:|| 3 Soloviev D-30KU-154-II|
|Crew:||Fatalities: 11 / Occupants: 11|
|Passengers:||Fatalities: 50 / Occupants: 50|
|Total:||Fatalities: 61 / Occupants: 61 |
|Airplane damage:|| Written off|
|Airplane fate:|| Written off (damaged beyond repair)|
|Phase:|| Approach (APR)|
|Nature:||Domestic Scheduled Passenger|
|Departure airport:||Chengdu Airport (CTU/ZUUU), China|
|Destination airport:||Wenzhou Airport (WNZ/ZSWZ), China|
PROBABLE CAUSE: A self-locking nut, other than castle nut with cotter pin as specified, had been installed at the bolt for connection between pull rod and bellcranck in the elevator control system. The nut screwed off, resulting in bolt loss, which led to the loss of pitch control.
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This map shows the airport of departure and the intended destination of the flight. The line between the airports does not
display the exact flight path.
Distance from Chengdu Airport to Wenzhou Airport as the crow flies is 1704 km (1065 miles).