On 24 July 1999, the Bandeirante crashed into a mountain near Delailasakau, killing all 15 passengers and 2 crew on board, making it the deadliest aviation accident to occur in Fiji.

At about 08:40, police received a call from the radio telephone operator from Windina to say that they heard a loud crash out in the hills, north of Nasevou village.

[6] The aircraft involved in the crash was an Embraer EMB 110 Bandeirante (Serial Number 110416) registered in Fiji as DQ-AFN.

[7] The Civil Aviation Authority of Fiji (CAAF) investigated the crash of Flight 121, with assistance from the Australian Transport Safety Bureau (ATSB).

Interviews conducted by the CAAF found that witnesses stated that before the aircraft crashed, parts of its tail and wings fell down onto the forest, indicating a possible structural failure.

The structural failure that occurred in flight was a result from the crew's error in descending below the Minimum Descent Altitude of 5,400 ft (1,600 m).