What was found
RETURNED AFTER TAKEOFF DUE TO UNKNOWN FUEL QTY. AT RUNWAY BEFORE TAKEOFF RDU LT TANK IND 4800 & RT TANK IND 4700. EARLY IN CLIMB EICAS MSG FUEL IMBALANCE. LT TANK IND +/- 5300 & RT TANK IND +/- 4500. TRANSFERRED TO EVEN THE INDICATED FUEL. AFTER LANDING =/- 30 MINS RT TANK INDICATOR WAS BOUNCING UP & DOWN BY 200 - 300 LBS DURING SMOOTH LEVEL FLIGHT. R & R THE FUEL CONDITIONING UNIT AMM 28-41-00. PERFORMED OPERATIONS TEST OF THE ELEC FUEL QTY IAW AMM 28-41-00. OPERATIONS CHECKED GOOD.