AN MD90 IN CRUISE AT FL310 THE CREW WAS ADVISED OF A L WING UPPER SURFACE INBOARD FUEL BOOST PUMP ACCESS PLATE FUEL LEAK CAUSED BY LOOSE TANK PLATE FASTENERS.

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ABOUT 200 MI E OF DEN; THE #2 FLT ATTENDANT ADVISED ME THAT PAX WERE CONCERNED ABOUT FUEL LEAKING FROM THE L WING. I WENT BACK AND OBSERVED WE DID HAVE FUEL LEAKING FROM THE OVERWING BOOST PUMP ACCESS PANEL. I HAD BEEN RUNNING A FUEL LOG AND RECOMPUTED OUR FUEL USED VERSUS BLOCK AND FUEL REMAINING. I SHOWED A 200 LB DIFFERENCE. I CONTACTED FLT CTL VIA COMMERCIAL RADIO AND RELAYED OUR PROB. HAVING 24300 LBS FUEL REMAINING AND ONLY 1 1/2 HRS TO FLY TO RNO; EVEN WITH A LOSS RATE OF 200 LBS PER HR; WE ESTIMATE AN ENDING FUEL OF 15000 LBS REMAINING ON ARR AT RNO. THE DISPATCHER AND I AGREED CONTINUED FLT TO RNO WAS ACCEPTABLE. I CONTINUED TO COMPUTE BLOCK FUEL VERSUS FUEL REMAINING AND UPDATED FLT CTL OVER SLC. ON ARR IN RNO WE HAD 14500 LBS; 500 LBS LESS THAN PLANNED DUE TO UNFORECAST 120 KT WINDS FROM SLC TO RNO. MAINT FOUND LOOSE SCREWS AND ARE WORKING ON CLRING THE WRITE-UP. NOTE: WE RAN THE FUEL LEAK CHKLIST AND IT DID NOT ADDRESS OUR PROB. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS AN MD90 AND WAS ONLY A FEW DAYS OLD. THE RPTR SAID THE LEAK WAS LOCATED ON THE L WING UPPER SURFACE INBOARD FUEL PUMP ACCESS PLATE AND WAS CAUSED BY THE FASTENERS ON THE PLATE BEING LOOSE. THE RPTR STATED THE LOSS OF FUEL DID NOT CAUSE ANY DIVERSION.