What was found
AIRCRAFT WAS GROUNDED: DURING CLIMB LEFT FUEL DISPLAY BLANKED, LEVELED AT FL230. LEFT DISPLAY RETURNED WITH LARGE IMBALANCE 8.2/ 7.09 LBS ONLY RIGHT TANK APPEARED TO BE DRAINING 5-7 MINS LATER BOTH SCREENS CONTINUE; AIRCRAFT AIR RETURNED TO DFW. EMERGENCY WAS NOT DECLARED. AIRCRAFT WAS NOT OVERWEIGHT FOR LANDING. FUEL QUANTITY WAS NORMAL. REMOVED AND REPLACED FUEL QUANTITY PROCESSOR (AALA202111179930) PER AMM 28-41-81 SEE ITEM 1 ON FORM 10194 FOR SIGNATURES AND CORRECTIVE ACTIONS ALSO REMOVED AND REPLACED LEFT WING COMP PROBE PER AA AMM 28-41-21-401.