As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, NR 1 ENGINE FIRE LOOP SHORT CIRCUIT LIGHT FLICKERS ON AND OFF. UPON TAXI IN FIRE WARNING ON NR 1 ENGINE CAME ON AND SHORT CIRCUIT LIGHT CAME ON STEADY. REMOVED AND REPLACED NR 1 FIRE WARNING CONTROL, SYSTEM OPS CHECKED GOOD PER MM CH 26-00.