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Accident
Last updated: 17 October 2017
Status:
Datum:vrijdag 15 maart 1963
Tijd:05:40 UTC
Type:Avro 685 York C.1
Luchtvaartmaatschappij:Trans Mediterranean Airways - TMA
Registratie: OD-ACZ
Constructienummer: 1218
Bouwjaar: 1945
Motoren: 4 Rolls-Royce Merlin
Bemanning:slachtoffers: 4 / inzittenden: 4
Passagiers:slachtoffers: 0 / inzittenden: 0
Totaal:slachtoffers: 4 / inzittenden: 4
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:11 km (6.9 mijl) SE of Karai (   Iran)
Fase: Kruisvlucht (ENR)
Soort vlucht:Vracht
Vliegveld van vertrek:Tehran-Mehrabad Airport (THR/OIII), Iran
Vliegveld van aankomst:Beirut International Airport (BEY/OLBA), Libanon
Beschrijving:
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."

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


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Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Tehran-Mehrabad Airport en Beirut International Airport bedraagt 1449 km (906 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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