There is a quick and easy way to put fuel in the tail to check pumps or isolation valve operations.
- You must have 6600 lbs of fuel in the "donor" tanks.
- On panel 110VU (Outside Fueling Panel) set the power supply to normal.
- Place Mode Selector to Defuel.
- Turn the Transfer Valve Switch on (you should get light).
- Center and Trim Tanks open.
- All other tanks shut.
- In cockpit pull Transfer Valve C/B,132VU, P55.
- On panel 110VU place Mode Selector switch to Refuel position.
- In cockpit, turn donor tanks pumps on.
You should start to see the tail tank take fuel when the center tank is around 1500 lbs.
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