Crash-aerien 09 AUG 1968 d'un Vickers 739A Viscount G-ATFN - Langenbruck
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Statuts:Accident investigation report completed and information captured
Date:vendredi 9 aot 1968
Type/Sous-type:Silhouette image of generic VISC model; specific model in this crash may look slightly different
Vickers 739A Viscount
Compagnie:British Eagle International Airlines
Immatriculation: G-ATFN
Numéro de série: 394
Année de Fabrication: 1958-07-15 (10 years )
Heures de vol:18656
Moteurs: 4 Rolls-Royce Dart 510
Equipage:victimes: 4 / à bord: 4
Passagers:victimes: 44 / à bord: 44
Total:victimes: 48 / à bord: 48
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:près de Langenbruck (   Allemagne)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Intern.
Aéroport de départ:London-Heathrow Airport (LHR/EGLL), Royaume Uni
Aéroport de destination:Innsbruck-Kranebitten Airport (INN/LOWI), Autriche
Numéro de vol: 802
The Vickers Viscount aircraft was operating a scheduled passenger flight from London, U.K. to Innsbruck, Austria. The flight proceeded at FL210 towards the destination. Over the Allersberg VOR, the aircraft was positively identified by radar control. At 13:02 hours, while over the 'Mike' NDB, the radar return from G-ATFN was seen to coincide with that of another aircraft some 13,000 ft below. At this time the Munich Controller called G-ATFN , advised the aircraft of its position and cleared it down to FL120. There was no reply to this or any subsequent call by Munich. Only one radar return was observed to leave 'Mike' and this merged into Munich radar's permanent echoes at about 13:04 hours. Subsequently it was established that G-ATFN had crashed on the autobahn approximately four nautical miles north of 'Mike'. The aircraft had hit the ground in a slightly nose-down attitude with the wings almost level and broke up on impact.
A fierce local fire broke out in the remains of the centre section. Almost due west of the accident site, the outer section of both wings, which had become symmetrically and simultaneously detached, were found.

Probable Cause:

PROBABLE CAUSE: "The accident is attributable to the fact that the aircraft's electrical power supply failed in cruising flight - possibly without the generator warning lights illuminating or illuminating distinctly - which meant that during the subsequent descent, which had to be carried out by instruments because of the weather, the vital instruments for indicating the flight attitude showed increasingly incorrect readings and failed completely after the gyros had stopped rotating.
Under these conditions it was unavoidable for the aircraft to get into uncontrolled flight attitudes, in which it was subjected to severe loading. These loads exceeded the ultimate load and led to structural failure.
Following the fracture of the wings and elevator and when the crew came into visual contact with the ground, it was no longer possible to exert any decisive control over the flight path.
It has not been possible to determine with certainty the cause of failure of the electrical system. It may be assumed, however, that a fault occurred in the DC generator control circuit. Faults had occurred repeatedly in the electrical supply system without their true cause being discovered."


photo of Vickers-739A-Viscount-G-ATFN

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 London-Heathrow Airport et Innsbruck-Kranebitten Airport est de 966 km (604 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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Vickers Viscount

  • 445 built
  • 72ème loss
  • 38ème accident fatal
  • le accident 4ème le plus grave (à ce moment là)
  • le accident 11ème le plus grave (en ce moment)
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