What was found
AFTER TAKEOFF, AT ABOUT 400 FT, NR 2 ENG FIRE WARNING LIGHT CAME ON. ENG PARAMETERS CHECKED NORMAL. CREW FOLLOWED EMERGENCY PROCEDURES, RETURNED TO FIELD. AFTER LANDING, ENGINE WAS SHUTDOWN BY USING THE STOP AND FEATHER BUTTON. CREW DISCHARGED ENGINE FIRE EXTING BOTTLE. AFTER DEPLANING PASSENGERS, CREW PERFORMING WALKAROUND, OBSERVED FLAMES COMING OUT OF ENG INTAKE AND TAILPIPE, DISCHARGED CABIN FIRE EXTING DOWN ENG INLET. FOUND BROKEN BLEED AIR CLAMP IN COWLING WHEN COWLING WAS OPENED. BROKEN CLAMP ALLOWED BLEED AIR TO TURN ON THE FIRE WARNING LIGHT, INTERNAL ENG FIRE WAS CAUSED BY MALFUNCTION IN FUEL SHUTOFF. (NM05200500912) (K)