As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRAINING FLIGHT AROUND THE PATTERN ABOVE KFMM PILOT NOTICED FIRE WARNING LIGHT INTERMITTENTLY ILLUMINATED. PILOT REPORTED REDUCING POWER AND LIGHT WOULD NOT ILLUMINATE AGAIN. LANDED AIRCRAFT AND REPORTED TO MAINTENANCE THE CONDITION. UPON TROUBLESHOOTING IT WAS FOUND ONE PROBE WIRE WAS CHAFFING AT FIREWALL AND SETTING THE LIGHT OFF. OPS CHECK GOOD AND RETURNED TO SERVICE.