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Last updated: 21 October 2019
Status:Definitief
Datum:maandag 26 september 1960
Tijd:21:40
Type:Silhouette image of generic VISC model; specific model in this crash may look slightly different
Vickers 837 Viscount
Luchtvaartmaatschappij:Austrian Airlines
Registratie: OE-LAF
Constructienummer: 437
Bouwjaar: 1960
Aantal vlieguren:1273
Aantal vluchten:872
Motoren: 4 Rolls-Royce Dart 525/01
Bemanning:slachtoffers: 5 / inzittenden: 6
Passagiers:slachtoffers: 26 / inzittenden: 31
Totaal:slachtoffers: 31 / inzittenden: 37
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:11 km (6.9 mijl) W of Moskva-Sheremetyevo Airport (SVO) (   Rusland)
Fase: Nadering (APR)
Soort vlucht:Internationale lijnvlucht
Vliegveld van vertrek:Warszawa-Okecie Airport (WAW/EPWA), Polen
Vliegveld van aankomst:Moskva-Sheremetyevo Airport (SVO/UUEE), Rusland
Vluchtnummer: 901
Beschrijving:
Flight 901 departed Vienna for a flight to Warsaw and Moscow. The aircraft was approaching runway 07 of Moscow's Sheremetyevo Airport when it contacted trees and crashed 11 km short of the runway.

Probable Cause:

PROBABLE CAUSE: "The investigations revealed that there were no technical deficiencies in the aircraft itself or an meteorological phenomenon involved in the accident. The Austrian observers participating in the investigation of the accident were of the opinion that the accident was related to altitude measurement, inasmuch as it was apparent from radio communications as well as from the examination of the wreckage that that the crew believed that they were flying at the normal approach altitude. The erroneous altitude measurement may be attributed to: a) a technical deficiency of either of the two altimeters.; b) the divergent settings of the altimeters; or c) mission of altimeter reading or erroneous reading of altimeters. The internal mechanism of both altimeters was so heavily damaged that it could no longer be ascertained whether, at the time of the accident, the altimeters were functioning accurately. Both altimeters were set to the correct atmospheric pressure but their settings differed, namely the left altimeter was set at QFE 0990 mb and the right altimeter at 1013 mb, which in view of the prevailing atmospheric pressure conditions, could have corresponded both to QNH and to the standard pressure setting. Such divergent settings are at variance with the usual procedure of Austrian Airlines. The reasons prompting the flight captain to depart from the usual practice could not be ascertained. It was not possible to reach a categorical conclusion as to which of the three causes were responsible for an approach below the minimum flying altitude."



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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 Warszawa-Okecie Airport en Moskva-Sheremetyevo Airport bedraagt 1142 km (714 miles).
Accident location: Approximate; accuracy within a few kilometers.

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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Vickers Viscount

  • 445 built
  • 31e ongeval
  • 18e dodelijk ongeval
  • 5e zwaarste ongeval (toen het plaatsvond)
  • 24e zwaarste ongeval (op dit moment)
» safety profile

 Rusland
  • 5e zwaarste ongeval (toen het plaatsvond)
  • 83e zwaarste ongeval (op dit moment)
» safety profile