Thanks very much for your replies, it sure gives some useful insights. I think it's agreed among instructors that none should
trust the parking brake and still use foot pressure. Beside that though, I can imagine an increase in maintenance write-ups regarding the brakes. Our aircraft do fly 5-6 flights a day so it will involve a lot of use of parking brakes. Talking to our maintenance department they agreed that overuse of the parking brake may lead to excessive wear which makes the brake itself less efficient. Then it will always be the human factor with a forgotten/not fully released parking brake, which can be counterproductive to safety. Oh well... I guess the persuasion have to continue
