Originally Posted by
homonculus
Can someone explain to an ignorant rotary pilot, not used to a reinforced security door, how this disruption might have escalated to an intercept?
Presumably the pilots would have either been totally unaware, or they would have had a bang on the door, or they would have had an update from the CC.
Why would any of these circumstances lead them to believe there was a risk of loss of command? What might a professional crew state over the RT to lead to this?
A professional crew would inform ATC of the facts. It's not about them believing there was a risk of loss of command, it's to do with someone trying to get in the door.
ICAO Disruptive Passenger levels
Level 1 — Disruptive behavior (verbal);
Level 2 — Physically abusive behavior;
Level 3 — Life-threatening behavior (or display of a weapon);
Level 4 — Attempted or actual breach of the flight crew compartment.
In this situation, I'm sure that ATC have a SOP which is put into play. The response that is mobilised isn't down to the crew.