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Last updated: 2 April 2020
Statuts:Enquête Officielle
Date:vendredi 25 février 1994
Heure:19:46
Type/Sous-type:Silhouette image of generic VISC model; specific model in this crash may look slightly different
Vickers 813 Viscount
Compagnie:British World Airways
Immatriculation: G-OHOT
Numéro de série: 349
Année de Fabrication: 1958
Heures de vol:50995
Moteurs: 4 Rolls-Royce Dart 530
Equipage:victimes: 1 / à bord: 2
Passagers:victimes: 0 / à bord: 0
Total:victimes: 1 / à bord: 2
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:7,5 km (4.7 milles) SW of Uttoxeter (   Royaume Uni)
Phase de vol: En vol (ENR)
Nature:Cargo
Aéroport de départ:Edinburgh-Turnhouse Airport (EDI/EGPH), Royaume Uni
Aéroport de destination:Coventry-Baginton Airport (CVT/EGBE), Royaume Uni
Numéro de vol:4272
Détails:
The aircraft was en-route to Coventry in severe icing conditions when the no. 2 engine failed and the prop auto feathered. The no. 3 engine also ran down. The crew, at that moment descending from FL150, were cleared for an immediate descent to FL70 and then to FL50. The crew elected to divert to Birmingham since the engines wouldn't restart. They managed to restart the no. 2 engine a little later, but then the no. 4 engine failed. Just 5 minutes short of Birmingham load shedding occurred and radio and intercom were lost. The Viscount struck trees on down sloping terrain and broke up.

Probable Cause:

CAUSAL FACTORS: "i) Multiple engine failures occurred as a result of flight in extreme icing conditions. ;
ii) Incomplete performance of the emergency drills by the crew, as a result of not referring to the Emergency Checklist, prejudiced the chances of successful engine re-starts. ;
iii) Crew actions for securing and re-starting the failed engines, which were not in accordance with the operator's procedures, limited the power available. The drag from two unfeathered propellers of the failed engines and the weight of the heavily iced airframe resulted in a loss of height and control before the chosen diversion airfield could be reached. ;
iv) Poor Crew Resource Management reduced the potential for emergency planning, decision making and workload sharing. Consequently, the crew had no contingency plan for the avoidance of the forecast severe icing conditions, and also was unaware of the relative position of a closer diversion airfield which could have been chosen by making more effective use of air traffic services."

Accident investigation:
cover
Investigating agency: AAIB
Status: Investigation completed
Duration: 1 years
Accident number: AAIB AAR 3/95
Download report: Final report

Sources:
» FSF Accident Prevention Vol. 52, No. 6 (June 1995)
» ICAO Adrep Summary 2/94 (#23)


Opérations de secours

AAIB issued 2 Safety Recommendations

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Photos

photo of Vickers-813-Viscount-G-OHOT
accident date: 25-02-1994
type: Vickers 813 Viscount
registration: G-OHOT
 

Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Edinburgh-Turnhouse Airport et Coventry-Baginton Airport est de 414 km (259 miles).
Accident location: Exact; as reported in the official accident report.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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