further to my post above
this clear video does show a QR from the AFS
https://www.youtube.com/watch?v=Hf-QLDGgORk
and this is shot at a head on angle
https://www.youtube.com/watch?v=rYyh10HA7VY
at 10s in of the top mentioned video
the 777 is slowing to a final stop on fire in RH ENG and the fire trucks are half way to the a/c
by 30s the fire is immense and now pooling under what looks like the RH ENG.
by 1m 6s the first truck is spraying on target - others getting in position
at 1m 20s
a pair of rapid access air stairs are on their way BUT by this time the 777 using the LHS chutes many pax could be out of the a/c had EVAC been called
at 3m in the rapid airstairs have still not been positioned at the fwd door - -by this time all pax and crew could have been off the plane (who are still on board at this time)
whats the point of these steps???
240 pax and crew with 4 or 5 double width doors fitted with uber big dual lane slides could have been off PDQ