Judah wrote:
The other night I was on an airline flight...


The necessary response time if the CFR is going to be effective is on
the tune of 30 seconds. They will take the advantage of any advance
notice to get out in position if there is any even slight possibility
that they would be required.

I've seen them roll the equipment on a number of situations like
overtemp on APU's, etc.. I even had the ANG CFR brigade get
called out after me after reporting an burnt electrical smell on a
return to landing after maintenance.