Company I worked for has a fleet of BBs. The check is done at 100% Nr. Local orders require the catch to be on, the friction to be on and the pilot to hold the lever througout the check. The last two were introduced after a student managed to slip the catch, the lever rose 'cos he wasn't holding it, aircraft tipped onto its tail - no damage luckily!
There can be variations in terminology eg:
Squirrel - Flight Idle - throttle fully open.
Bell 412 - Flight Idle - throttles at idle
