How do you manually transfer fuel?

• A. Use gravity cross flow only
• B. Selected X FLOW AUTO OVERRIDE to MAN, then selected the X FLOW on the low side to ON
• C. Engage crossfeed valve to AUTO
• D. Use external pump

Answer: (B)

Manual fuel transfer relies on the crossfeed path between left and right tanks. To control this transfer yourself, you first override the automatic crossflow by setting X FLOW to MAN. Once in manual, you open the crossfeed path on the low side (the side you want to receive fuel) to ON. This creates a deliberate flow from the other wing into the low-side tank, allowing fuel to move where you need it and helping balance the aircraft or ensure a pump has enough fuel.

Gravity-only crossflow isn’t reliable or controllable, and AUTO would let the system decide when to move fuel rather than you, which isn’t the same as a deliberate manual transfer. Using an external pump isn’t part of the standard crossfeed transfer procedure and isn’t how this manual transfer is performed.