Status: | Accident investigation report completed and information captured |
Datum: | Sonntag 31 Januar 1971 |
Flugzeugtyp: | Antonow An-12B |
Fluggesellschaft: | Aeroflot, Tyumen Civil Aviation Directorate |
Kennzeichen: | CCCP-12996 |
Werknummer: | 00347403 |
Baujahr: | 1970 |
Triebwerk: | 4 Ivchenko AI-20M |
Besatzung: | Todesopfer: 7 / Insassen: 7 |
Fluggäste: | Todesopfer: 0 / Insassen: 0 |
Gesamt: | Todesopfer: 7 / Insassen: 7 |
Sachschaden: | Zerstört |
Konsequenzen: | Written off (damaged beyond repair) |
Unfallort: | 14 km (8.8 Meilen) N of Surgut Airport (SGC) ( Russland)
|
Flugphase: | Annäherung (APR) |
Betriebsart: | Frachtflug |
Flug von: | Tyumen-Roschino International Airport (TJM/USTR), Russland |
Flug nach: | Surgut Airport (SGC/USRR), Russland |
Unfallbericht: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.
Informationsquelle:
»
Soviet Transports» NTSB/AAR-96/02 (144)
Fotos
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does
not display the exact flight path.
Distance from Tyumen-Roschino International Airport to Surgut Airport as the crow flies is 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.