As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT ENGINE FIRE WARNING LIGHT FLICKERED ON AND OFF DURING CLIMB. CREW RETURNED TO STATION. FAILED FIRE DETECTOR PROBE (CENTER CERAMIC INSULATOR LOOSE). REPLACED FIRE DETECTOR LOCATED BELOW THE OIL COOLER MOUNTED ON THE FIREWALL. (NM05200400110) (K)