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Last updated: 18 September 2020
Statuts:Enquête Officielle
Date:vendredi 25 mai 1979
Type/Sous-type:Silhouette image of generic VISC model; specific model in this crash may look slightly different
Vickers 806 Viscount
Compagnie:British Airways
Immatriculation: G-AOYS
Numéro de série: 367
Année de Fabrication: 1958-05-24 (21 years )
Moteurs: 4 Rolls-Royce Dart 520
Equipage:victimes: 0 / à bord: 4
Passagers:victimes: 0 / à bord: 51
Total:victimes: 0 / à bord: 55
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:Cardiff-Wales Airport (CWL) (   Royaume Uni)
Phase de vol: A l'atterrissage (LDG)
Nature:Transport de Passagers Nat.
Aéroport de départ:Cardiff-Wales Airport (CWL/EGFF), Royaume Uni
Aéroport de destination:Bristol Airport (BRS/EGGD), Royaume Uni
Détails:
The aircraft was on a flight from Cardiff/Wales to Paris with an intermediate landing at Bristol . When the landing gear was selected during the approach to Bristol, the left gear failed to extend.
The aircraft returned to Cardiff where full engineering facilities were available and, after a flypast, the tower confirmed the left gear was retracted. As repeated attempts to lower the gear were unsuccessful, extra fuel was burnt off before commencing an approach to runway 31 with the left gear retracted. The aircraft made a smooth touchdown and continued along the runway before finally coming to rest on the grass turning 90° to the left after leaving the runway approximately 1200 m from the threshold. Full emergency services were available, and quickly at the scene, and evacuation was successfully completed without injuries to occupants. There was no fire.
Examination of the aircraft hydraulic system showed it to be serviceable, including the emergency system. The aircraft's left wing was lifted by crane and the landing gear lowered by removing the uplock lug from the oleo leg. Ground locks were fitted and the aircraft towed to the hangar for further investigation.
Inspection of the uplock mechanism showed that a bolt was missing from the operating linkage. The bolt is in part of the linkage which is common to both main and emergency hydraulic systems. The bolt was found in the wheel bay and it was seen that the threaded portion had broken off. Initial metallurgical opinion is that it had failed in fatigue.

Sources:
» AIB Bulletin 8/79


Photos

photo of Vickers-806-Viscount-G-AOYS
accident date: 25-05-1979
type: Vickers 806 Viscount
registration: G-AOYS
 

Video, social media

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 Cardiff-Wales Airport et Bristol Airport est de 43 km (27 miles).

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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