B-727 EXCEEDED FUEL IMBALANCE LIMITATIONS DURING LNDG.

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RECEIVING THE B-727 THE #3 AND TOTAL FUEL GAUGES WERE MEL'D. THE CREW DECIDED TO DRAIN #3 TANK AND FILL IT TO A KNOWN LEVEL; SINCE WE HAD MINIMUM TIME TO ACCOMPLISH THIS; WE WERE DELAYED. JUST OFF IOE; AND FEELING RUSHED; I MISSED THE XFEED POS AFTER THE FUELERS WERE FINISHED. I HAD #1 AND #3 XFEED OPEN; AND #2 CLOSED. NOT UNTIL DSCNT DID I NOTICE THIS. AS THE FLT CONTINUED THE CAPT NOTICED THE R WING GETTING HVY BUT SINCE #3 AND TOTAL FUEL GAUGES INOP IT WAS NOT OBVIOUS WHAT THE PROB WAS. I WENT BACK TO SEE IF WE HAD A FLOATING SPOILER. WHEN I RETURNED I NOTICED THE XFEEDS WERE NOT IN THE STANDARD POS. THE CAPT DIDN'T WANT TO CHANCE FEEDING #3 ENG FROM THE #3 TANK IN CASE THE FUEL WASN'T FEEDING SO WE ELECTED TO FEED #3 ENG FROM THE #2 TANK. WE LANDED WITH APPROX 5000 LBS OUT OF BAL. CONTRIBUTING FACTORS WERE FEELING RUSHED; #3 TANK AND TOTAL FUEL GAUGES INOP AND #1 BOOST PUMP A LITTLE STRONGER THAN #3 PUMPS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: ACFT IS A B-727. RPTR STATES #3 FUEL GAUGE; ONLY; INOP. INOP TOTAL IS NOT A MEL ITEM. NORMAL OP IS WITH #1 AND #3 XFEEDS CLOSED FOR TANK TO ENG FLOW. XFEEDS WERE LEFT OPEN AS A RESULT OF SO'S DISTR IN ABNORMAL SIT; AND ASSOCIATED SCHEDULE PRESSURE. NOW; SO STATES THAT THESE POS WOULD STAND OUT LIKE BULL'S EYES. #1 BOOST PUMP STRONGER THAN #3; AND ONCE ERROR WAS COMMITTED; INOP GAUGE MADE ACCURATE DETERMINATION OF FUEL SIT; IMPOSSIBLE. FLC NOTICED WING HVY CONDITION DURING DSCNT. CAPT'S HVY WORKLOAD LED TO TROUBLE-SHOOTING WITHOUT SO'S INPUT. CAPT'S SOLUTION DID NOT ALLEVIATE PROB SINCE SOLUTION WAS TO FEED #3 ENG FROM THE #2 TANK. SO STATES THAT SHE FAILED TO CONVEY WHAT SHE FELT SHE HAD DONE WRONG. FLC COUNSELED BY COMPANY. FUEL IMBALANCE LIMITATION IS 1000 LBS.