Gents, all I'm trying to do is establish whether or not this arcane logic buried deep in wiring schematics is visible in the real world. The time delay is not mentioned in my rather detailed engineering training manuals or in the maintenance manual or in the FCOMs (as far as I know). Are the inboards consistently below the outboards when the message appears or is it not noticeably visible because of randomness?
If I understand correctly, MarkerInbound is now telling me that the message can even pop up before the tanks are equal? Or is he talking about specific imbalances (left wing vs right wing, rather than inboard/outboard)? The logic specifies that the first wing to go equal will trigger the >FUEL TANK/ENG logic, so the logic is not concerned about left wing total Vs right wing total imbalances.
Thanks!