From Stormcloud:
"Bus 429, 411A, Airbubba et al,
Let me get this right.
You have an engine fire, use the bottle, the light goes out and you do what.........?
By your arguments, stick the nose down and throw it on the nearest piece of tarmac!
I think not."
For example, Stormcloud, the BA SOP requires their crews to do just that. There is no option to say "OK then, it's gone out, let's press on for a while and see what happens".
You get the aeroplane down and the passengers out (via steps if possible) and then talk about it afterwards.