As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH 1.1 FUEL IN CENTER TANK, WING GAUGES DISAGREE BY 2000 LBS. AFTER CENTER TANK EMPTY, 2000 LBS IMBALANCE REMAINED. FUEL USED SHOWED .3 DIFF, A-C REMAINED IN TRIM. X-FEED FUEL LEFT TO RIGHT WITH A-P DISCONNECTED A-C ROLLED TO RIGHT. *S/D* IMBALANCE WAS RESULT OF LOW OUTPUT FROM RIGHT OVERRIDE PUMP. PUMP WAS DIFFUSERLESS TYPE IN OVERRIDE POSITION. DIFFUSER TYPE PUMP INSTALLED AND OPERATION CHECK GOOD.