At the factory they did explain this to me and has been designed that way since the A109A. No big issue as long as you put the wheel chocks in. It runs off the electric hydraulic pack so power has to be switched on to charge up the parking brake prior to removing the chocks.
Sorry to disagree. I fly the 109E and there is no electrical hydraulic pack on the aircraft...you must start the aircraft for the hydraulic pumps to work...this in turn recharges the relevant hydraulic accumulators. The bottom line is that the parking brake can become ineffective over time.
Chocks...thats the answer.
HP