What was found
GROUND CREW WAS ADVISED OF A TAILPIPE FIRE ON THE LEFT ENGINE ABOUT 6 TO 7 MINUTES AFTER ENGINE START. CREW PULLED FIRE HANDLE AND NO BOTTLES WERE NEEDED TO EXTINGUISH. ENGINES WERE RUNNING NORMALLY PRIOR TO TAXI OUT, BOTH ENGINES HAD NORMAL STARTS. THE AIRCRAFT WAS GROUNDED. MAINTENANCE ACCOMPLISHED FIM 71-05-00, NO ABNORMALITIES FOUND. ACCOMPLISHED LEFT HAND ENGINE RUN AND PERFORMED SATISFACTORY OPERATIONAL CHECK.