Video shows fire tenders underway before aircraft stopped.
Reports suggest fire started when thrust reverses were deployed so the fire response was good, particularly if they were in station at time of the call.
Passengers were told by Captain that the reason for the turn back was an oil leak, not a fuel leak.
So the passengers were not pre stressed for an emergency on landing.
There was no smoke or heat or communally felt bump on landing, so it was only a minority of passengers, those with a view of the fire, that would have fed the panic.
I would hope if I was on board that I wouldn't rush the doors, praying that the captain knew the source of the fire was oil and not fuel and he had a stop watch on the fire tenders.
Perhaps "engine on" warning lights by the doors would help crew decide the safe deployment of slides?
Useful if passengers are rowdy and for four engine craft.
Mickjoebill