CABIN ATTENDANT RPT; B757; YVR-DFW. POSSIBLE ELECTRICAL FIRE; SMOKE FROM MID GALLEY COFFEE MAKERS; CABIN ATTENDANT PULLED CIRCUIT BREAKERS DIVERT TO SLC. MAINT PROC.

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AS I WAS PICKING THE LAST TRAYS; I HEARD SEVERAL CALL LIGHTS GO OFF AT ONCE. AT THE SAME TIME; PEOPLE SEATED IN THE FIRST FEW ROWS OF THE MAIN CABIN WERE STANDING AND SCREAMING. I RAN UP TO THE FRONT OF MAIN CABIN AND NOTICED SMOKE COMING OUT OF THE MID GALLEY WHERE WE HOUSE 2 COFFEE MAKERS AND A BEVERAGE CART. I ALSO SMELLED AN ELECTRICAL FIRE. I LOOKED INTO THE COFFEE POTS TO SEE IF THEY WERE EMPTY. SOMETIMES IF THE POTS ARE LEFT EMPTY AND THE HOT PADS ARE TURNED ON; THE BOTTOM WILL BURN AND CAUSE A SIMILAR SMELL. I NOTICED THE POTS WERE FULL OF COFFEE. AT THAT TIME; I REACHED FOR THE CIRCUIT BREAKERS AND POPPED THEM ALL OUT. ALMOST IMMEDIATELY; THE SMOKE AND SMELL DISSIPATED. A PAX FROM THE BACK OF THE AIRPLANE APCHED ME AND IDENTED HIMSELF AS AN AIRLINE MECH. HE PULLED THE COFFEE MAKERS FROM THE HOUSING AND WE INSPECTED FOR FLAMES. THERE WERE NONE. WE THEN INFORMED THE CAPT THAT THE SIT APPEARED TO BE UNDER CTL; BUT WE COULD NOT BE SURE. THE CAPT TALKED WITH THE MECH AND CONCLUDED THAT IT WAS BEST TO LAND AS SOON AS PRACTICAL. WE DID NOT PREPARE THE CABIN FOR AN EMER EVAC; SINCE THE CAPT HAD INFORMED THE PAX THAT EVERYTHING WAS UNDER CTL. HE SAID WE WERE MAKING A PRECAUTIONARY LNDG IN SLC AND THAT WE WOULD BE MET BY FIRE AND RESCUE VEHICLES. WE LANDED AT SLC WITHOUT INCIDENT. PAX WERE ASKED TO DEPLANE AND FIRE RESCUE PERSONNEL CAME ON BOARD. AFTER A QUICK INSPECTION; THEY FELT THE INCIDENT MAY HAVE BEEN CAUSED BY A FAN HOUSED IN THE GALLEY. NOTHING WAS CONFIRMED BY THE TIME I WAS REMOVED FOR A LEGAL BREAK. I WAS THEN SENT TO MY HOTEL.