What happens if SOPs to prevent conflicting clearances are not followed?
14 Dec 2015
On 1 December 2011 a Boeing 737 was cleared to taxi in, on a route which included crossing another active runway, and contact GND. The controller who had issued that clearance then inadvertently issued a take off clearance to a Gama Charters Learjet 45 for the runway to be crossed. One of the 737 pilots saw the approaching Learjet and warned the PF to stop as the runway crossing was about to begin. The departing aircraft then overflew the stationary 737 by 62 feet after rotating shortly before the crossing point without seeing it.