FK10 FO NOTICED A FUEL PUDDLE UNDER #1 ENG. ENG HAD A SMALL INTERNAL FIRE.

Narrative

AFTER BLOCK IN AND CHKLIST; I PROCEEDED TO DO EXTERNAL POSTFLT AS REQUIRED. UPON REACHING ENG #1; I NOTICED A FUEL PUDDLE ABOUT 3 FT WIDE UNDER ENG. I COULD NOT DETERMINE IF IT WAS FROM OUR ACFT OR A PREVIOUSLY DEPARTED ACFT. TO AVOID CALLING CONTRACT MAINT UNNECESSARILY; I RETURNED TO JETBRIDGE AND ADVISED CAPT OF THE LEAK POSSIBILITY; AND I WOULD CHK THE ENG AGAIN WHILE HE PRESSURIZED THE FUEL LINE. I RETURNED TO ENG AND COULD NOT SEE ANY ACTIVE LEAK. AS I RETURNED TO JETBRIDGE I NOTICED LIGHT SMOKE COMING FROM THE INTAKE. BY THIS TIME THE CAPT HAD NOTICED THE SMELL IN THE COCKPIT AND HAD SHUT OFF PRESSURE. HE ADVISED ME TO MOTOR #1 ENG TO PUT OUT WHAT APPEARED TO BE A TAILPIPE FIRE. HE; SEEING THAT LCL PERSONNEL HAD ALREADY CALLED THE FIRE TRUCKS AND WERE ON SITE AND THE FEW REMAINING PAX HAD ALREADY EXITED; WENT OUTSIDE TO MONITOR THE ENG. WE STOPPED MOTORING AND CAPT CHKED THE ENG AND ADVISED MOTORING AGAIN; WHICH STOPPED THE LAST VESTIGES OF SMOKE AND FIRE. NO FIRE SUPPRESSION WAS REQUIRED OR USED FROM COCKPIT OR EXTERNALLY. NEEDLESS TO SAY; WE NOW KNEW IT WAS OUR ACFT WHICH NEEDED MAINT.