Overview
The accident occurred during a local agricultural spraying mission in the Kherson region. The aircraft was engaged in applying materials over fields when it encountered a critical engine malfunction while at low altitude. The subsequent loss of control led to a crash in an open field.
Accident Sequence
The copilot was flying the aircraft at an altitude of about 50 meters when he initiated a turn. During this maneuver, the engine lost power. The aircraft stalled and descended uncontrollably, striking the ground in an open field. The captain was seriously injured in the accident, and the copilot sustained fatal injuries.
Investigation Findings
The official investigation determined that the probable cause of the accident was a loss of control at low altitude resulting from a momentary engine malfunction. The malfunction was attributed to a blockage of the valve in the number 1 cylinder. The valve became blocked due to dust accumulation. Investigators found that the aircraft was predominantly used in dusty environments and that the engine had not been cleaned regularly. This combination led to the valve obstruction.