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Accident
Last updated: 12 December 2017
Statuts:
Date:vendredi 15 mars 1963
Heure:05:40 UTC
Type/Sous-type:Avro 685 York C.1
Compagnie:Trans Mediterranean Airways - TMA
Immatriculation: OD-ACZ
Numéro de série: 1218
Année de Fabrication: 1945
Moteurs: 4 Rolls-Royce Merlin
Equipage:victimes: 4 / à bord: 4
Passagers:victimes: 0 / à bord: 0
Total:victimes: 4 / à bord: 4
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:11 km (6.9 milles) SE of Karai (   Iran)
Phase de vol: En vol (ENR)
Nature:Cargo
Aéroport de départ:Tehran-Mehrabad Airport (THR/OIII), Iran
Aéroport de destination:Beirut International Airport (BEY/OLBA), Liban
Détails:
The Avro York plane carried out a freight flight from Beirut to Tehran via Kuwait. On the Kuwait-Tehran leg of the flight several test manoeuvres were carried out by a check pilot who was examining the pilot in command and co-pilot for renewal of their licenses.
The flight arrived at Tehran at 17:40 GMT and departed Tehran again at 05:30 GMT. The crew didn't report when 25 miles out as requested; it appeared the plane had crashed 16 miles W of the airport.

Probable Cause:

PROBABLE CAUSE: "The position of the propellers at the time of impact would indicate that, at a time when the no. 4 engine power was off, an emergency condition developed which necessitated the feathering of no. 3 engine and the unfeathering of no. 4. Alternatively, a loss of power on the starboard engines could have occurred from an erroneous manipulation of the feathering switches during the course of this assumed crew checking exercise. In view of the fact that the fully loaded aircraft was flying at a low altitude after taking off from Mehrabad Airport which has an elevation of 3900 feet, it is evident that at the aircraft would not have sufficient altitude for the pilot to take effective recovery action and so avoid a crash resulting from the above mentioned loss-of-power conditions."

Sources:
» ICAO Accident Digest No.15 - Volume II, Circular 78-AN/66 (29-33)


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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 Tehran-Mehrabad Airport et Beirut International Airport est de 1449 km (906 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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