I can assume we are talking about the IAE V2500 powered A320. Currently running thru my course notes. Seem to remember the No.4 bearing compartment situated in a high temperature, high pressure enviroment at the centre of the combustion section.
The No 4 bearing Scavange Valve has 2 postions Open and Min, (not fully closed).
Last edited by allthatglitters; 16th Jan 2005 at 16:08.