As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A FIRE INDICATION ON THE NR 1 ENGINE DURING TAXI IN. FIRE BOTTLE WAS DISCHARGED. MAINTENANCE INSPECTED THE ENGINE AREA AND FOUND DRAIN LINES BURNED AND JET PIPE SLID BACK. DRAIN LINE WAS REPLACED AND JET PIPE WAS REINSTALLED IAW 008-7810-312. FORWARD FIRE BOTTLE WAS REPLACED IAW DASH 8 MM. FIRE DETECTION SYSTEM OPERATIONALLY CHECKED GOOD. AIRCRAFT GROUND RUN OPERATIONAL AND LEAK CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.