146's make me cry!
geez mate those 146's made me cry a few times too, what a pig of an aircraft.
smithgd, yes using a pitot static tester will give you the req'd altitude inputs for mode c .
I think the airbuses (at least) you can dial an altitude into the cfds or cmc test to alleviate the need for pump up of the P/S system
aveng I believe is correct test code to be entered into the atc controller is 2100 [ NB!! in Australia that is.]