The crew's response to the threat of a mid-air collision caused a Nigerian ADC Airlines Boeing 727-200 to dive the aircraft into a lagoon during its descent to Lagos Airport on 7 November 1996, say investigators. Flight-data and cockpit-voice recorders, read by the US National Transportation Safety Board, show that an air-traffic-control clearance for descent to 5,000ft (1,500m) took the ADC aircraft across the path of a Triax Airlines 727. The ADC pilot rolled his aircraft so violently that he lost control, causing the aeroplane to dive from 16,000ft (4,900m).


Source: Flight International