On May 14, 1938, a Polikarpov Po-2 (registration CCCP-T210) operated by Osoaviakhima was involved in an aviation accident near Uralsk, Kazakhstan in flight. 2 people were killed. Investigators recorded the probable cause as: The accident was caused by the aircraft being unairworthy due to improper securing of the control column after partial dismantling and an expired Certificate of Airworthiness. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A).
A local training flight near Uralsk ended in a fatal crash after the pilot lost control during a turn. The investigation attributed the accident to an unairworthy aircraft with improper maintenance and expired certification.
What happened
The crew departed from Uralsk to conduct a local training exercise. During the flight, they executed two slight turns at an altitude of approximately 250 metres. While maneuvering, the pilot-in-command lost control of the aircraft. The airplane subsequently entered a dive and collided with the ground in the vicinity of the airfield. Both individuals on board were killed in the impact.
Findings
The official investigation concluded that the loss of control resulted from the aircraft being not airworthy. Records indicated that the plane had been partially dismantled four months prior to the accident. During reassembly, the control column was not properly secured. Despite these maintenance issues and the fact that the Certificate of Airworthiness had expired on April 1st, the crew proceeded with the training flight. The altitude at which the loss of control occurred was too low for the crew to recover from the resulting dive.
Probable cause
The accident was caused by the aircraft being unairworthy due to improper securing of the control column after partial dismantling and an expired Certificate of Airworthiness.
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