vilas:You are choosing dogma over practicality. These pins are only there to give a measure of how much brake pad thickness remains. With anything other than brand new brakes this is obvious to see. So, using your arguement what happens to the everyday operations with an airline that chooses to routinely set the park brake off on all turnarounds? Your logic would have the flightcrews having to wait until just before engine start (see checklist - brakes ON ) to then rush out and check the brake wear because now the brakes are set to PARK! From your previous postings you seem to be very involved in simulator training - do you get any line flying these days?