The servicing level inspections currently carried out on the CF-18 are as follows:
B Check - Before flight, as the name implies this is the check carried out prior to flight
Pre-flight - carried out by the pilot just prior to strap-in.
A Check - carried out after flight
AB Check - quick turn-around check that verifies critical areas prior to the next sortie
DI - Daily Inspection, valid for 24 hrs.
There are also hot turns, where they can refuel the aircraft and swap pilots without shutting the aircraft down. This negates requirement to carry out any of the above checks between flights, but the ground crew still carries out a cursory walk-around of the aircraft for any glaring signs of issues with the aircraft.
And the most fun of all - the operational turn-around. On this one the ground crew fuel the aircraft and replenish armament stores simultaneously. Obviously, as the name implies, this is really only done during operations due to the increased risks involved with the concurrent activities taking place.
We don't do a PI though, I'm really not even sure what that entails...guess I need to work on another fleet to find out!