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Last updated: 20 September 2020
Status:
Date:Saturday 6 January 1968
Time:18:27
Type:Silhouette image of generic AN24 model; specific model in this crash may look slightly different
Antonov An-24B
Operator:Aeroflot, Yakutsk Civil Aviation Directorate
Registration: CCCP-47733
C/n / msn: 69901001
First flight: 1966
Total airframe hrs:1543
Cycles:1083
Crew:Fatalities: 6 / Occupants: 6
Passengers:Fatalities: 39 / Occupants: 39
Total:Fatalities: 45 / Occupants: 45
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location:92 km (57.5 mls) W of Olyokminsk (   Russia)
Phase: En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Olyokminsk Airport (OLZ/UEMO), Russia
Destination airport:Lensk Airport (ULK/UERL), Russia
Flightnumber:1668
Narrative:
Aeroflot flight 1668, an Antonov An-24B, performed a regular flight from Yakutsk to Novosibirsk intermediate stops in Olyokminsk, Lensk, Ust-Kut and Krasnoyarsk. In Olyokminsk, the flight landed at 17:50 and took off at 18:10.
At 18:20 the crew reported that the assigned flight level of 4500 m had been reached. Weather conditions along the route were favorable. At 18:28 the aircraft disappeared from the controller's radar screen.
It was found to have crashed and broken up in the taiga, 92 km from Olyokminsk.

Probable Cause:

Presumable causes of the crash are:
1) due to unexplained circumstances, the aircraft went into flight modes that significantly exceed the maximum speed and overload limits;
2) separation from the aircraft of any part or parts, the impact of which caused the destruction of structural elements, presumably in the tail section;
3) a complex failure in the propeller-regulator-engine system, which led to a a loss of control with the subsequent destruction of the aircraft structure;
4) any failure in the aircraft control system.

Classification:
Loss of control

Sources:
» Soviet Transports
» airdisaster.ru


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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 Olyokminsk Airport to Lensk Airport as the crow flies is 308 km (193 miles).
Accident location: Global; accuracy within tens or hundreds of 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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Antonov An-24

  • 1332 built
  • 10th loss
  • 4th fatal accident
  • The worst accident (at the time)
  • 16th worst accident (currently)
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 Russia
  • 10th worst accident (at the time)
  • 57th worst accident (currently)
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