What happened
During the final approach phase toward the runway threshold at Calcutta-Dum Dum Airport, the aircraft's right engine ceased operation. Following this loss of power, the copilot-in-command lost control of the aircraft type, which subsequently entered a stall. The plane crashed before reaching the runway.
Despite the impact, there were zero fatalities among the crew members involved in the incident. Both occupants of the flight remained uninjured during the accident. However, the aircraft sustained damage that was classified as being beyond repair.
Findings
Investigations into the crash revealed that the event was triggered by an unauthorized maneuver performed by the captain. The pilot attempted to simulate a failure of the starboard engine by feathering the propeller while on final approach. This action was taken without informing the copilot, who was actively managing the flight controls at the time. Because the copilot was unaware of the sudden change in engine status, they were unable to maintain control, leading to the unannounced engine feathering and the resulting aerodynamic stall.