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Accident
Last updated: 21 October 2017
Statuts:Enquête Officielle
Date:samedi 2 mai 1953
Heure:ca 16:35
Type/Sous-type:Silhouette image of generic COMT model; specific model in this crash may look slightly different
de Havilland DH-106 Comet 1
Compagnie:British Overseas Airways Corporation - BOAC
Immatriculation: G-ALYV
Numéro de série: 06008
Année de Fabrication: 1952-04-09 (1 year )
Heures de vol:1649
Moteurs: 4 de Havilland Ghost 50 Mark I
Equipage:victimes: 6 / à bord: 6
Passagers:victimes: 37 / à bord: 37
Total:victimes: 43 / à bord: 43
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:32 km (20 milles) NW of Calcutta-Dum Dum Airport (CCU) (   Inde)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Intern.
Aéroport de départ:Calcutta-Dum Dum Airport (CCU/VECC), Inde
Aéroport de destination:Delhi-Safdarjung Airport (VIDD), Inde
Numéro de vol:783/057
Détails:
A de Havilland DH-106 Comet 1 passenger plane, operated by BOAC, was destroyed in an accident near Calcutta, India. All 43 on board were killed.
The airplane operated on a return flight from London, UK to Singapore.
On its return leg from Singapore it landed at Calcutta-Dum Dum Airport at 15:10 hrs local time. Intermediate stops were made at Bangkok and Rangoon before arriving at Calcutta.
The flight took off from runway 19L at 15:29 and was cleared to climb under Visual Flight Rules and report when passing 7500 feet. The aircraft encountered a severe squall with thunderstorm shortly after takeoff when climbing to its cruising altitude, and suffered structural failure in the air which caused fire. The pilots lost control and the Comet crashed.

Probable Cause:

PROBABLE CAUSE: "Structural failure of the airframe during flight through a thunder squall. In the opinion of the Court, the structural failure was due to overstressing which resulted from either:- (1) Severe gusts encountered in the thunder squall, or (2) Overcontrolling or loss of control by the pilot when flying through the thunderstorm."

Sources:
» CIVIL AIRCRAFT ACCIDENT Report of the Court Investigation on the Accident to COMET G-ALYV on 2nd May, 1953


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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 Calcutta-Dum Dum Airport et Delhi-Safdarjung Airport est de 1297 km (811 miles).
Accident location: Approximate; accuracy within a few kilometers.

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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