A friend is traveling on yesterday's 284 from SFO to LHR. It was slightly delayed on departure and the reason given is: DELAY ZY (see below). Does anyone know what this means?
DOBA284/28AUG
* OPERATIONAL FLIGHT INFO * BA 284 -1 SU 28AUG16
CITY INFO HOUR (LOCAL)
SFO ESTIMATED TIME OF DEPARTURE 1715
LEFT THE GATE 1713
TOOK OFF 1732
DELAY ZY