Is that the same "general jet engines and high altitude flying" test that ...
The flow was through the boost pumps and past a low-pressure sensor, through two check valves, and finally through the engine fuel shutoff valve. There is a boost pump bypass valve which allows fuel to be drawn from the tank by the engine pumps even if all boost pumps are off. Fuel flow is the same for tanks 1 and 3 except that they have two boost pumps each instead of four. There are standpipes to keep you from pumping below 2,300 pounds and the crossfeeds need to be closed if you have the dump valves open, right?
So lets say we need to dump 12,000 pounds and ...
727 Fuel dumping problems were still on the test in 2007.
Now lets talk about LEMAC and then we're talking about F4's.