Firing a weapon in an aircraft will doom it? That's just nonsense. Maybe in a technically inaccurate movie...
That Hollywood myth should be debunked by now.
Also, LEOs in small, confined spaces normally use frangible ammunition.
Also, LEOs in small, confined spaces normally use frangible ammunition. Uh... no they don't (at least not Air Marshalls), if what I've read on other forums is correct.
But even if it's not frangible, it's not going to bring down a plane.