As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT GT051 - MIA/BOG-ATB, NR 4 ENGINE A AND B LOOP FIRE WARNING LIGHTS ILLUMINATED AND BELL SOUNDED. BOTH LOOPS WENT TO 5. AIRCRAFT RETURN TO MIA WAS UNEVENTFUL. MAINTENANCE FOUND CLAMP TO 8TH STAGE DUCT FAILED AND THRUST REVERSER HALVES DAMAGED. REPLACED ALL PARTS AND ENGINE RUN-UP NORMAL. (M)