On 2 February 1966 the helicopter operating the flight crashed near Fardipur after an oil leak developed and the main gearbox failed.

[1] The S-61, registered AP-AOC, left Dacca at 14:03 local time on 2 February 1966 and within 15 minutes an oil leak had started from a pipe connected to the main gearbox.

[1] The flight continued and while the helicopter was at an altitude of 500 feet (152 m) crossing the Padma River the sole survivor noticed that the oil leak was visible in the passenger cabin.

[1] About 3.5 miles (5.6 km) from Faridpur heliport, a bird strike occurred, with a vulture hitting one of the rotor blades on the left side of the helicopter.

[1] The accident was attributed to the disengagement of the left and right spur gear teeth in the main transmission, caused by the load imposed by the failure of the gearbox's rear sleeve bearing journals.