As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF NR 3 ENGINE FIRE WARNING LIGHT CAME ON AND NACELLE HEAT FOR NR 3 ENGINE READ 8 ON BOTH SIDES. AFRTER LEVELING OFF AND REDUCING POWER, THE LIGHT WENT OUT. ENGINE SHUT DOWN PERFHB AIRCRAFT RETURNED TO AIRPORT. C/A: FOUND 14TH STAGE DUCT CLAMPS LOOSE AT 3 POSITION. RESECURED DUCT. INSPECTED ALL ENGINE DUCTS AND PERFORMED LEAK CHECK PER PG.