amicus
Why would it make any difference by having insulation when all the occupants of an aircraft that has a 550 degree fire would be incinerated long before the fuselage could burn through.
To all of you who think that having a problem with an elt is a big setback for Boeing, you obviously know nothing about aircraft.
The elt is not connected to the aircraft wiring and the elt in the main cabin would be contained inside a life raft !!!