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Accident
Last updated: 21 October 2017
Statuts:Enquête Officielle
Date:jeudi 24 septembre 1959
Heure:22:24 UTC
Type/Sous-type:Silhouette image of generic DC7 model; specific model in this crash may look slightly different
Douglas DC-7C
Compagnie:Transports Aériens Intercontinentaux - TAI
Immatriculation: F-BIAP
Numéro de série: 45366/892
Année de Fabrication: 1957
Heures de vol:5844
Moteurs: 4 Wright R-3350 (988TC18)
Equipage:victimes: 9 / à bord: 9
Passagers:victimes: 45 / à bord: 56
Total:victimes: 54 / à bord: 65
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:3 km (1.9 milles) SW of Bordeaux-Mérignac Airport (BOD) (   France)
Phase de vol: En montée initiale (ICL)
Nature:Transport de Passagers Intern.
Aéroport de départ:Bordeaux-Mérignac Airport (BOD/LFBD), France
Aéroport de destination:Bamako Airport (BKO/GABS), Mali
Numéro de vol: 307
Détails:
TAI flight 307 was a regular passenger service from Paris-Orly, France to Bordeaux, France, Bamako, Mali and Abidjan, Ivory Coast.
The DC-7 took off from Bordeaux runway 23 at 22:23 UTC for the leg to Bamako. After leaving the ground and reaching a height of about 30 m, the aircraft overflew a zone without luminous ground markings. The aircraft didn't gain altitude and collided with pinetrees 2950 m from the start of the takeoff.

Probable Cause:

PROBABLE CAUSE: "The Board considered that the accident was probably caused by the most unfavourable combination of several of the factors set forth under "Theories considered as to the cause of the accident."
The reconstructed flight showed that during the first segment of climbout and during a very short critical phase [about 10sec beginning 40sec after full throttle] a slight increase in speed will produce a considerable decrease in rate of climb or even a slight loss of altitude.
In view of the rapid sequence of cockpit operations during this phase, together with the rapid variation in flight parameters, and the lack of precision - even inaccuracy - of readings of certain instruments, and lacking time reference and external visual references, a pilot may follow a line of flight that will bring the aircraft back near the ground if, during this period, optimum climbing speed is not maintained and the altimeter is not carefully watched."

Accident investigation:
cover
Investigating agency: BEA
Status: Investigation completed
Duration: 1 year
Accident number: Report f-ap590924
Download report: Final report

Sources:
» ICAO Circular 64-AN/58 (41-50)


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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 Bordeaux-Mérignac Airport et Bamako Airport est de 3630 km (2269 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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