Business jet pilot 'took action to avoid crash'
The German-owned Citation 525 jet passed only just over half a mile away and 100ft to 200ft below the Turkish Airlines' Boeing 777 plane in the skies over London, the Air Accidents Investigation Branch (AAIB) report said.
The Citation had been cleared by the control tower at London City Airport to climb, initially to 3,000ft.
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Hide AdBut acknowledging the instruction, the crew said it would be climbing to 4,000ft – a "readback" mistake not noticed by the tower controller.
The Boeing 777 had been cleared to descend to 4,000ft and it was at this height that it passed the Citation.
The AAIB report, which described the events of July 27 as a "serious incident", said the 777 had not "followed the commands" from three on-board collision-avoidance warnings.