Loss of control Accident Antonov An-24B CCCP-47733, Saturday 6 January 1968
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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
Owner/operator:Aeroflot, Yakutsk Civil Aviation Directorate
Registration: CCCP-47733
MSN: 69901001
Year of manufacture:1966
Total airframe hrs:1543 hours
Cycles:1083 flights
Fatalities:Fatalities: 45 / Occupants: 45
Other fatalities:0
Aircraft damage: Destroyed, written off
Category:Accident
Location:92 km W of Olyokminsk -   Russia
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Olyokminsk Airport (OLZ/UEMO)
Destination airport:Lensk Airport (ULK/UERL)
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.

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.

Sources:

Soviet Transports
airdisaster.ru

Statistics

  • 15th worst accident in 1968
  • 17th worst accident of this aircraft type
  • worst accident of this aircraft type at the time

Location

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