As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A, FIRE WARNING ON NR 1 ENGINE AFTER TAKEOFF ON CLIMBOUT. SECURED ENGINE IAW PROCEDURE. FIRE WARNING LIGHT/BELL WENT OUT WHEN POWER REDUCED. FOUND FUEL DEICING HEATER DUCT BROKEN. REMOVED AND REPLACED MANIFOLD AND RAN ENGINES. OPS CK AND LK CK GOOD PER MM 71-00-00.