As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KMIA - FLT 75848 - SHUTDOWN NR 3 ENGINE AT 1132Z DUE TO FIREWARNING. FIRE WARNING STOPPED WHEN FUEL SHUTOFF. REPAIRED AND REROUTEDDAMAGED WIRE ON RIGHT SIDE LOOP CONNECTOR ON ENGINE. RAN ENGINE AT TAKEOFFPOWER. CHECKS GOOD ON GROUND. NO EVIDENCE OF FIRE FOUND. (M)