As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TPA INFLIGHT - LEFT FIRE WARNING ACTIVATED AFTER DURING CLIMB. RETURNED TO TPA AND LANDED WITHOUT INCIDENT. FIRE WARNING STOPPED AFTER REDUCING THROTTLE TO IDLE. REPLACED ANTI-ICE DUCT AND UPPER COWLING. SYSTEM GROUND CHECKED NORMAL OPERATION.