Start with an extra engine start and warm-up. After some minutes at idle I start taxi at apron, to check steering and brakes. Very easy to control. Brakes works as excepted, there are no problem to hold aircraft with the brakes up to 2200 rpm. Water temp increase up to 100 C during this exercise, but this might be an abnormal situation. I will later perform some more normal taxiing at the runway. Supervisor made an inspection today. A lot of discussion about how and why. No major remarks.