EMB120 ACFT IN DSCNT TO DEST FLC NOTED FUEL IMBAL AND TOOK ACTION TO CORRECT. IN ORDER TO GET THE IMBAL WITHIN LNDG CRITERIA; THEY EXTENDED THE FLT IN THE ARPT VICINITY UNTIL CORRECTED.

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RTE EYW-MCO. LEG #6; 13 HR DUTY DAY. DURING EXECUTION OF DSCNT CHKLIST; IT WAS NOTED BY PNF/FO THAT FUEL GAUGES READ: L 1100 LBS; R +/-100 LBS. FO IMMEDIATELY SELECTED L BOOST PUMPS 'ON' AND XFEED OPEN; R BOOST PUMPS 'OFF.' THIS WAS TO IMMEDIATELY START XFERRING FUEL TO R TANK. DURING INITIAL START OF DSCNT A 'DOORS' MASTER CAUTION LIGHT AND 'SVC' DOORS LIGHT INTERMITTENTLY CAME ON WITH INCREASED AIRSPD. LIGHT EXTINGUISHED UPON SPEED REDUCTION. ABOUT THE TIME THE FUEL IMBAL WAS NOTED A 'FUEL' CAUTION LIGHT BRIEFLY ILLUMINATED. CRM BTWN CAPT AND FO DETERMINED THAT EVEN WITH EXTREME IMBAL AND LOW #2 TANK READING; #2 ENG WOULD NOT QUIT DUE TO FUEL STARVATION. NEXT WAS DISCUSSED LIMITATION OF FUEL IMBAL FOR LNDG. FO ACCESSED FLT STANDARDS MANUAL AND CONFIRMED MAX IMBAL WAS 'DEMONSTRATED ONLY.' IT WAS FURTHER DISCUSSED AND AGREED TO EXTEND FLT TO LAND NEAR THE MAX DEMO IMBAL FIGURE WHILE KEEPING MINIMUM REQUIRED RESERVE FUEL ON BOARD AT TOUCHDOWN. ATC WAS NOTIFIED OF IMBAL SIT; REQUESTING VECTORS TO BURN DOWN FUEL TO LNDG LIMITS. VECTORS AND BURNDOWN COMPLETED; LNDG WAS MADE WITHOUT INCIDENT. EXTENUATING FACTORS: 1) ACFT HAD PROB WITH R WING FUEL VENT VALVE. VALVE WAS DEFERRED; REQUIRING OVERWING REFUELING. 2) AFTER 8 YRS OF CHKLIST ON MULTI FUNCTION DISPLAY; FAA RECENTLY MADE COMPANY STOP USING THAT PRACTICE AND GO TO PAPER CHKLIST. CAPT LAID HIS CHKLIST ON CTR CONSOLE; OVER FUEL GAUGES RESULTING IN GAUGES NOT BEING SCANNED (CLUTTER IN COCKPIT). 3) 'DOORS' LIGHT WAS CAUSED BY IMPROPERLY FASTENED 'DZEUS' FASTENER ON FUEL SVC DOOR. 4) FUEL IMBAL CAUSE: UNDETERMINED BY MAINT.