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Accident
Last updated: 20 October 2017
Estado:Final
Fecha:miércoles 24 febrero 1999
Hora:16:34
Tipo:Silhouette image of generic T154 model; specific model in this crash may look slightly different
Tupolev 154M
Operador:China Southwest Airlines
Registración: B-2622
Numéro de série: 90A-846
Año de Construcción: 1990
Horas Totales de la Célula:14135
Ciclos:7748
Motores: 3 Soloviev D-30KU-154-II
Tripulación:Fatalidades: 11 / Ocupantes: 11
Pasajeros:Fatalidades: 50 / Ocupantes: 50
Total:Fatalidades: 61 / Ocupantes: 61
Daños en la Aeronave: Anulado
Consecuencias: Written off (damaged beyond repair)
Ubicación:Ruian (   China)
Fase: Aproximación (APR)
Naturaleza:Vuelo Doméstico Programado
Aeropuerto de Salida:Chengdu Airport (CTU/ZUUU), China
Aeropuerto de Llegada:Wenzhou Airport (WNZ/ZSWZ), China
Número de Vuelo:4509
Descripción:
The aircraft was on a flight from Chengdu to Wenzhou and was approaching Wenzhou when, at 1000 m, 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.

Probable Cause:

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.

Fuentes:
» ICAO Adrep
» Soviet Transports


Fotos

photo of Tupolev Tu-154M B-2622
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Map
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).
Accident location: Global; accuracy within tens or hundreds of kilometers.

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Tupolev Tu-154

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