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Accident
Last updated: 11 December 2017
Status:Schlussbericht
Datum:Mittwoch 24 Februar 1999
Zeit:16:34
Flugzeugtyp:Silhouette image of generic T154 model; specific model in this crash may look slightly different
Tupolew 154M
Fluggesellschaft:China Southwest Airlines
Kennzeichen: B-2622
Werknummer: 90A-846
Baujahr: 1990
Betriebsstunden:14135
Anzahl Zyklen der Zelle:7748
Triebwerk: 3 Soloviev D-30KU-154-II
Besatzung:Todesopfer: 11 / Insassen: 11
Fluggäste:Todesopfer: 50 / Insassen: 50
Gesamt:Todesopfer: 61 / Insassen: 61
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:Ruian (   Volksrepublik China)
Flugphase: Annäherung (APR)
Betriebsart:Inländischer planmäßiger Passagierflug
Flug von:Chengdu Airport (CTU/ZUUU), Volksrepublik China
Flug nach:Wenzhou Airport (WNZ/ZSWZ), Volksrepublik China
Flugnummer:4509
Unfallbericht:
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.

Informationsquelle:
» 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.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Tupolev Tu-154

  • 1026 built
  • 52nd loss
  • 28th Fataler Unfall
  • 15th worst accident (Zu diesem Zeitpunkt)
  • 23rd worst accident (Momentan)
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 Volksrepublik China
  • 7th worst accident (Zu diesem Zeitpunkt)
  • 8th worst accident (Momentan)
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