What was found
DFW - FLT 830 - AT THE GATE DURING ENGINE START FOR DEPARTURE, LEFT ENGINE EXPERIENCED TAIL PIPE FIRE. LEFT ENGINE FUEL SHUTOFF/START LEVER WOULD NOT RETURN TO SHUTOFF DETENT. ACTIVATED LEFT ENGINE FIRE BOTTLE AND GROUND CREW ASSISTED WITH FIRE EXTINGUISHERS. FIRE WAS EXTINGUISHED AND WAS CONTAINED IN TAIL PIPE. REPLACED LEFT ENGINE AND LEFT FUEL SHUTOFF TELEFLEX CABLE. REPLACED LEFT ENGINE FIRE BOTTLE. ACCOMPLISHED LEAK AND GROUND CHECKS WITH NO DEFECTS FOUND. ACCOMPLISHED GROUND ENGINE RUN WITH NO DEFECTS FOUND. SYSTEMS GROUND CHECKED NORMAL OPERATION. (M)