Final answer:
A Federal Flight Deck Officer (FFDO) is a pilot volunteer authorized to carry firearms and defend the aircraft, with jurisdiction ending at the cockpit doors.
Step-by-step explanation:
The airline security coordinator you are referring to is known as a Federal Flight Deck Officer (FFDO). The FFDO program allows trained and authorized flight deck officers, including passenger and cargo airline pilots, to carry firearms and defend their aircraft against acts of criminal violence or air piracy.
It is important to note that the jurisdiction of an FFDO indeed ends at the cockpit doors, meaning their authority and responsibility are limited to the flight deck and the protection thereof.