What was found
CREW FOUND FUEL CROSSFEED NOT MAINTAINING A BALANCED CONDITION AS RT WING TANK CONTINUED TO DEPLETE. CROSSFEED SWITCHES CYCLED & CIRCUIT BREAKERS CHKD. REPORTED FUSELAGE FUEL NOT TRANSFERRING TO WING TANKS. ACFT PREVIOUSLY ISSUED MEL 28-2-2 FOR DISCREPANCY OF RT FUEL XFER PRESS LOW LIGHT. DECLARED AN EMERGENCY & DIVERTED. MADE AN UNEVENTFUL LANDING WITH 600 LBS OF FUEL IN RT WING TANK. MX OPERATED FUEL CROSSFEED SYS IN BOTH POSITIONS OF LT & RT TANK. CROSSFEED SYS OPS NORMAL. OPS CHECK OF LT FUSELAGE FUEL TRANSFER PROVED SATISFACTORY. NOTED BY MX THAT RT FUSELAGE FUEL TRANSFER SYS CURRENTLY UNDER MEL & LT TANK TO BE SELECTED ON FUEL CROSSFEED TO MAINTAIN FUEL BALLANCE. ACFT RETURNED TO SERVICE.