As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT NR 2071, CREW REPORTED THAT THE NR 1 ENGINE FIRE DETECTOR FAILED IN FLIGHT. FLIGHT LANDED IN CLE WITHOUT INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE NR 1 ENGINE FIRE DETECTOR. ALL OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.