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Last updated: 11 May 2021
Status:
Datum:donderdag 16 december 1976
Tijd:13:08
Type:Silhouette image of generic YK40 model; specific model in this crash may look slightly different
Yakovlev Yak-40
Luchtvaartmaatschappij:Aeroflot / Ukraine
Registratie: CCCP-87638
Constructienummer: 9141919
Bouwjaar: 1971
Aantal vlieguren:5762
Aantal vluchten:6627
Motoren: 3 Ivchenko AI-25
Bemanning:slachtoffers: 5 / inzittenden: 5
Passagiers:slachtoffers: 0 / inzittenden: 0
Totaal:slachtoffers: 5 / inzittenden: 5
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:nabij Kazakovskoye (   Oekra´ne)
Fase: Manoeuvreren (MNV)
Soort vlucht:Training
Vliegveld van vertrek:Zaporozhye Airport (OZH/UKDE), Oekra´ne
Vliegveld van aankomst:Zaporozhye Airport (OZH/UKDE), Oekra´ne
Beschrijving:
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.

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This information is not presented as the Flight Safety Foundation or the Aviation Safety Networkĺs 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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