I seem to recall that tailpipe fires occur during startup or shutdown, not when the engine is operating at idle or better.
The fix for these events is to drive the engine on it's starter to blow out the flames, no harm done.......that is unless you do a 'precautionary' evacuation and then have multiple pax on the ground running around the airplane, which will preclude any motoring operation.
And, since a tailpipe fire gives no fire warning indication in the flight deck, how did they know it was burning, for that 3 seconds.
"3 seconds tailpipe fire" - evacuation seems a mite over the top!
Just my 2 cents...incoming!
Cheers...FD...
