As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RTFL DUE TO NR 1 ENGINE FIRE WARNING LIGHT. SUPPLEMENTAL DATA UPDATE FOUND ANTI-ICE DUCT BROKEN. REPLACED DUCT. NO LEAKS FOUND AFTER DUCT REPLACEMENT. RAN ENG AT TAKEOFF POWER. NO ENGINE FIRE WARNINGS RESULTED. FIRE SYSTEM OPERATION TESTED GOOD.