High pressure, multiple metering zone gas turbine engine fuel supply system and method

A gas turbine engine fuel supply system, comprising:

• a primary gear pump having a primary gear pump inlet and a primary gear pump outlet, the primary gear pump adapted to receive a drive torque and configured, upon receipt thereof, to draw fuel into the primary gear pump inlet and discharge the fuel from the primary gear pump outlet;
• a secondary gear pump having a secondary gear pump inlet and a secondary gear pump outlet, the secondary gear pump adapted to receive a drive torque and configured, upon receipt thereof, to draw fuel into the secondary gear pump inlet and discharge the fuel from the secondary gear pump outlet;
• a supercharger pump having a supercharger pump inlet and a supercharger pump outlet, the supercharger pump adapted to receive a drive torque and configured, upon receipt thereof, to draw fuel into the supercharger pump inlet and discharge the fuel from the supercharger pump outlet;
• a pump control valve configured to selectively (i) fluidly isolate the supercharger pump from the primary and secondary gear pumps, and fluidly isolate the primary gear pump outlet from the secondary gear pump outlet, and (ii) fluidly communicates the supercharger pump outlet with the primary gear pump inlet and the secondary gear pump inlet, and fluidly communicate the primary gear pump outlet and the secondary gear pump outlet;
• and
• a pump bypass valve in fluid communication with the primary gear pump outlet and configured to regulate fuel pressure at the primary gear pump outlet to one of a plurality of preset differential pressures above one of a plurality of fuel load pressures.