A few more questions:
1. With a vented main tank, can we assume that even in MANUAL mode, the Main Tank
High Level sensor should close the LPFSs to prevent main tank over-filling
and fuel loss via the vent? Or, is the main tank vented to one or both wing tanks?
2. Is there: a) one jet pump, powered by the high pressure return line from the
engine-driven pump and supplied by the two low pressure lines from the wing tanks,
-or- b) two jet pumps, one in each wing tank, sharing the high pressure
return?
3. If 2.a. is true, can the pump favor one wing tank over the other due to minor
differences in head pressure? If this happens, causing one wing tank to empty
first and its fuel feed line to unport, will the jet pump suck air instead
of fuel, making the fuel remaining in the other wing tank unusable?
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