What happened
During a flight in severe weather conditions, an aircraft experienced significant engine irregularities approximately twelve minutes after departing. The engines began running intermittently, potentially due to moisture affecting the spark plugs. In response to these technical difficulties and the ongoing storm, the pilot attempted an emergency return to Baku-Bina Airport.
However, heavy visibility restrictions prevented the crew from identifying the airfield. Shortly thereafter, the engine temperatures decreased significantly. Within four minutes of this temperature drop, the aircraft lost control and impacted the sea near Baku. Following the crash, search and rescue operations were initiated but were terminated several days later because no wreckage or survivors could be located.
On May 13, 1966, investigators discovered the debris at a depth of 23 meters, situated roughly 19 km south of Nargen Island. The accident resulted in 33 fatalities.
Findings
Official investigations into the incident were unable to reach a definitive conclusion regarding the specific origin of the engine malfunctions.