As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 3 PYLON ENGINE FIREX SUPPLY LINE IS RIDING HARD AND WORN THROUGH AGAINST PYLON STRUCTURE AFT OF PYLON FWD BULKHEAD LOOKING THRU ACCESS PANEL 487FL. THE DAMAGE IS MEASURED AS 1.125 X .125 INCHES ). REMOVED AND REPLACED A SECTION OF FIREX PERMANENT LINE BETWEEN FIRE BOTTLE AND UPPER PILLOW CONNECTION PER M/M 20-10-01-2. BLENDED BULB SEAL SUPPORT BRACKET. FOUND THAT DAMAGE TO FIREX LINE WAS DUE TO MISSING SUPPORT BRACKET HARDWARE.