Narrative:
The Yakovlev operated on a training flight during which the pilots were practicing countering a (simulated) uncommanded stabilizer trim change. During these manoeuvres the airplane stalled. It entered a spin and crashed 1.4 km west of Novogupalovka railway station near Kazakovskoye.
Conclusion: The cause of the disaster is the loss of airspeed, followed by stall and transfer to a tailspin. Possible causes of speed loss are:
a) a mistake in the piloting technique by the crew;
b) piloting the aircraft according to, possibly, overestimated readings of the left pilot's airspeed indicator.
| Status: | |
| Date: | Thursday 16 December 1976 |
| Time: | 13:08 |
| Type: |  Yakovlev Yak-40 |
| Operator: | Aeroflot / Ukraine |
| Registration: | CCCP-87638 |
| MSN: | 9141919 |
| First flight: | 1971 |
| Total airframe hrs: | 5762 |
| Cycles: | 6627 |
| Engines: | 3 Ivchenko AI-25 |
| Crew: | Fatalities: 5 / Occupants: 5 |
| Passengers: | Fatalities: 0 / Occupants: 0 |
| Total: | Fatalities: 5 / Occupants: 5 |
| Aircraft damage: | Destroyed |
| Aircraft fate: | Written off (damaged beyond repair) |
| Location: | near Kazakovskoye ( Ukraine)
|
| Phase: | Maneuvering (MNV) |
| Nature: | Training |
| Departure airport: | Zaporozhye Airport (OZH/UKDE), Ukraine |
| Zaporozhye Airport (OZH/UKDE), Ukraine |
The Yakovlev operated on a training flight during which the pilots were practicing countering a (simulated) uncommanded stabilizer trim change. During these manoeuvres the airplane stalled. It entered a spin and crashed 1.4 km west of Novogupalovka railway station near Kazakovskoye.
Probable Cause:
Conclusion: The cause of the disaster is the loss of airspeed, followed by stall and transfer to a tailspin. Possible causes of speed loss are:
a) a mistake in the piloting technique by the crew;
b) piloting the aircraft according to, possibly, overestimated readings of the left pilot's airspeed indicator.
Classification:
Loss of control
Sources:
» Soviet TransportsPhotos
Map
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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