While conducting flight PK661 from Chitral to Islamabad, Pakistan International Airlines ATR 42-500 registered AP-BHO crashed north of Islamabad near Havelian in mountainous terrain. Flightradar24 received data from the aircraft, however, the data was incomplete and not sufficient to track the aircraft fully using MLAT. MLAT tracking requires signals from the aircraft to reach four FR24 receivers and during this flight, signals were only received by a maximum of three receivers.
Flightradar24 received altitude and squawk data during the flight, but we were not able to plot a track.
Flight PK661 was operated by AP-BHO, a Pakistan International Airlines ATR 42-500, one of four in operation with PIA. The aircraft first flew and was delivered to the airline in May 2007.