As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CLIMB-OUT OF MIA EXPERIENCED FIRE WARNING ON NR 4 ENGINE. SHUT DOWN ENGINE RETURNED TO MIA AND LANDED WITHOUT INCIDENT. INSPECTION REVEALED BROKEN FIRE DETECTOR ELEMENT ON INBOARD AFT COWL. REPLACED ELEMENT, SYSTEM CHECKED OK. RETURNED AIRCRAFT TO SERVICE. (M)