FO OF A B747-400 LEFT HIS FO DUTY STATION AND DEPLANED AT THE GATE DURING PREFLT WHEN THE CAPT ASKED HIM TO LEAVE SINCE HE WAS COMPLAINING ABOUT THE ACFT'S FUEL IMBAL. HE BELIEVED THAT THE CAPT'S ATTITUDE WAS AFFECTED BY PREVIOUS DRINKING OF ALCOHOL.

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I WAS THE FO ON AN ACR FLT. WE WERE DELAYED DUE TO A MECHANICAL PROB THAT KEPT CREEPING DUE TO WRONG PARTS. AFTER MAINT TOLD THE PAX WE WERE GOING; THEY FOUND SOMETHING ELSE WRONG. THEY DID THIS BEFORE THEY CANCELED THE FLT. SO CREW SCHEDULING TOLD US TO FERRY THE AIRPLANE TO SFO FOR MAJOR SVC. WE WERE READY TO GO WHEN THE CAPT FOUND THAT THE APU BURNED ALMOST 6000 LBS OF FUEL FROM #2 TANK. HE TRIED TO XFER FUEL TO NO AVAIL. I TOLD HIM THAT I WAS UNCOMFORTABLE GOING. HE GOT VERY ANGRY AND TOLD ME TO 'GET THE XXXX OFF MY AIRPLANE.' SO I GOT OFF. THE FUEL WAS IMBAL'ED BY 5700 LBS -- THE LIMIT IS 6000 LBS. I WAS NOT SURE IT WAS SAFE; SO I LEFT. ALL WOULD HAVE BEEN OK IF HE HAD BAL'ED THE GAS. THE SERIOUS PROB OCCURRED AS I WAS LEAVING THE AIRPLANE. THE CAPT TOOK 3 BOTTLES OF WINE FROM THE GALLEY. I DID NOT SEE HIM DRINKING; BUT HIS ANGER TOWARD ME WAS BEYOND WHAT A NORMAL PERSON WOULD DO. ANY OTHER PERSON WOULD HAVE BAL'ED THE GAS. WHEN WE GOT HOME TO BASE; OUR 'PROFESSIONAL STANDARDS' PEOPLE MET US TO INVESTIGATE THE SIT. THEY ARE HELPING THE CAPT NOW.