What was found
EICAS CAUTION MSG CAME ON FOR "XFEED CONFIG," "FUEL TANK TO ENGINE," & "FUEL XFEED 4" DURING CRUISE FLIGHT. AIRCRAFT RETURNED TO ANC.(<P>2 DEFERRALS HAD BEEN PLACED ON THE A/C IN THE ANC BEFORE DEPARTURE. #4 FUEL CROSS FEED VALVE INOP ON MEL 28-22-05-01 & #3 MAIN TANK OVERBOARD JETTISON PUMP PRESS LIGHT STAYS ON MEL 28-31-02A. WITH THESE ITEMS ON DEFERRAL, THESE CAUTION MESSAGES COULD APPEAR ON THE EICAS. REPLACED THE FUEL PRESSURE SWITCH FOR THE JETTISON PUMP DEFERRAL. REPLACED THE CROSS FEED VALVE ACTUATOR FOR THE #4 FUEL CROSS FEED VALVE. AIRCRAFT WAS RETURNED TO SERVICE.</P>)