Did a couple of pre ferry test flights on ex Flight West B200's before they went of to the USA or somewhere a while back out of YBBN.. .One thing we would look at was to climb to alt. and switch of a bleed and see what happened.. .What I expected to see was an initial cabin climb then a a recovery of cabin diff./alt. by the remaining bleed.. .Neither could hold cabin alt with only one bleed.. .Reported this and other problems, but someone still jumped in and flew over a whole lot of water where a DP sector would have resulted in a swim.I dont know that any amount of traiing would have an effect on this type of personality.. . Is this not the same vintage B200 that if the sun shone on your cowls from the wrong direction for long enough you would get fire indications? I wonder how many people ignored those master warnings, versus blowing a bottle etc?