B767 rise in oil level
My colleague recently handled a 767 a/c with a P&W4000 or a GE engine that had one of its engine oil indications rise by at least 4 units 1 hr after engine shutdown.It arrived with optimum eng oil level. They all thought it must be an indication problem(E&I). But when they opened the eng oil cap, oil just flowed out until it came to its normal level. Oil was normal, not foamy or bubbly. If its oil loss, there could be 101 reasons, but oil rise. The only reason i can think of is a problem with pressure relief valves. According to the capt, the indications were normal throughout the flight. Any other reasons u guys can think of ?