As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 3 ENGINE FIRE WARNING LIGHT ILLUMINATED WHILE EN ROUTE. BOTH FIRE BOTTLES WERE DISCHARGED, BUT THE LIGHT REMAINED ILLUMINATED. THE AIRCRAFT WAS DIVERTED TO SNN WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 3 ENGINE 8TH STAGE PNEUMATIC DUCT RUPTURED. THE DUCT WAS REMOVED AND REPLACED.