As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS ON DEPT 700LBS IN CENTER FUEL TANK. BURNED CENTER TANK FUEL - ALL BALANCED. ON DESCENT RIGHT WING FUEL QTY DECREASED 700LBS AND CENTER TANK GAINED 700LBS. COULD NOT DUPLICATE UNWANTED FUEL TRANSFER. CONFIRMED WITH INBOUND FERRY CREW AND TOM-C.