What happened
During a scheduled local training session at Karachi-Quaid-e-Azam Airport, the crew was performing specific stall testing maneuvers. While the aircraft was on its final approach, both engines experienced a simultaneous loss of power, leading to an aerodynamic stall. In an attempt to recover the aircraft and regain flight control, the crew maneuvered the plane; however, the aircraft ultimately crashed. The accident resulted in one fatality (the captain) and one serious injury (the copilot).
Findings
Investigations into the incident determined that both engines suffered from overtemperature conditions, which triggered their concurrent failure. This mechanical issue originated from a malfunction within the contact switches of the No.1 engine propeller automatic flight safety pitch lock withdrawal system. Furthermore, the investigation noted that the pilot did not manually withdraw the locks by moving the HP fuel cock levers into the required lockout position, which contributed to the simultaneous engine failure.