NP> Could it be the APU exhaust on top of the inboard right wing.  There has 
NP> been numerous ground evacuations when the F/E started the APU and it 
NP> frightened the passenger into thinking the aircraft was on fire???
Nat..
Right on!  As I read your message, I flashed back to my 727 F/O days!
I believe Boeing called it TORCHING!  Bin many years since I thought
of that.  Thanks Nat!
~Mitch 
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