As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE FIRE AGENT LOW, AT GATE AFTER ENGINE SHUTDOWN. REMOVED AND REPLACED NR 3 ENGINE FIRE DISCHARGE BOTTLES IAW MM 26-21-01-4. PERFORMED ALL ADJ/TEST'S PER MM 26-21-06/ 26-21-01. FOUND BRACKET BROKEN ON PNEUMATIC BLEED DUCT CAUSING UNRESTRAINED FLEX DUCT JOINT SEAL HOUSING TO LEAK. DUCTS SEPARATED BEYOND THE NORMAL RANGE. REPLACED BROKEN STANDOFF BRACKET.