Hmm... the CFM56 reads oil quantity when the engine is shut off since it is measured in the tank, in fact that is the only time the indication is reliable (from between five to thirty minutes after shutdown if Memory serves me right). Anyway, it is also very temperature dependant - maybe the cold soak inflight with the engine off can lead to such a low indication? Just guessing here, sorry :/
Last edited by STBYRUD; 5th Nov 2011 at 08:10.