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Accident
Last updated: 18 October 2017
Statuts:
Date:dimanche 3 juin 1973
Heure:15:20
Type/Sous-type:Silhouette image of generic T144 model; specific model in this crash may look slightly different
Tupolev 144S
Compagnie:Tupolev Design Bureau
Immatriculation: CCCP-77102
Numéro de série: 01-2
Année de Fabrication: 1972-03-29 (1 year 2 months)
Moteurs: 4 Kuznetsov NK-144A
Equipage:victimes: 6 / à bord: 6
Passagers:victimes: 0 / à bord: 0
Total:victimes: 6 / à bord: 6
Victimes au sol:victimes: 8
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Goussainville (   France)
Phase de vol: En montée initiale (ICL)
Nature:Démonstration
Aéroport de départ:Paris-Le Bourget Airport (LBG/LFPB), France
Aéroport de destination:Paris-Le Bourget Airport (LBG/LFPB), France
Détails:
During the second demonstration flight at the Paris Air Show '73 a low pass was made over runway 06. At the end of the runway the aircraft entered a steep climb. While the canards on the forward fuselage were being retracted, the Tu-144 entered a steep dive. The disturbed airflow may have caused one or more engines to flame out. In order to regain control the canards were deployed again. The crew tried to pull out of the dive, causing the overstressing of the airframe. The left canard-wing is reported to have separated, striking the wing and puncturing the fuel tank. The Tupolev broke up and crashed in flames into the small town of Goussainville.
It appears that, for safety reasons, the Tupolev factory had restricted the control surface deflection to a maximum of 5 degrees with canards extended. For the second day of the show Tupolev wanted a more impressive flight demonstration, certainly in comparison with the other supersonic transport (SST) at the air show: Concorde. Engineers thus disabled the 5-degree limitation. A latent erroneous set-up of the auto-stabilizer electronics now could have serious effects. After retraction of the canards the auto-stabiliser reacted by deflecting the elevons 10 degrees down. This caused the SST to enter a sudden dive.

Sources:
» Soviet Transports


Photos

photo of Tupolev Tu-144 CCCP-77102
CCCP-77102 during the flypast at the Paris Air Show just prior to the crash.
photo of Tupolev Tu-144 CCCP-77102
photo of Tupolev Tu-144 CCCP-77102
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Plan

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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