Vliegtuigongeval op 31 JAN 1971 met Antonov An-12B CCCP-12996 - Surgut Airport (SGC)
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Status:Accident investigation report completed and information captured
Datum:zondag 31 januari 1971
Type:Silhouette image of generic AN12 model; specific model in this crash may look slightly different
Antonov An-12B
Luchtvaartmaatschappij:Aeroflot, Tyumen Civil Aviation Directorate
Registratie: CCCP-12996
Constructienummer: 00347403
Bouwjaar: 1970
Motoren: 4 Ivchenko AI-20M
Bemanning:slachtoffers: 7 / inzittenden: 7
Passagiers:slachtoffers: 0 / inzittenden: 0
Totaal:slachtoffers: 7 / inzittenden: 7
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:14 km (8.8 mijl) N of Surgut Airport (SGC) (   Rusland)
Fase: Nadering (APR)
Soort vlucht:Vracht
Vliegveld van vertrek:Tyumen-Roschino International Airport (TJM/USTR), Rusland
Vliegveld van aankomst:Surgut Airport (SGC/USRR), Rusland
Beschrijving:
Aileron oscillations coincided with flap extension. The crew misunderstood this as asymmetrical flap extension and retracted the flaps again. The airspeed had dropped to 172 knots. The aileron suddenly deflected then , causing a left roll. The aircraft undershot the runway.
The hinge moment reversal on the ailerons and subsequent loss of control was caused by icing.

Bronnen:
» Soviet Transports
» NTSB/AAR-96/02 (144)


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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 Tyumen-Roschino International Airport en Surgut Airport bedraagt 645 km (403 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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