As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOT REPORTED A FIRE LIGHT ILLUMINATION WHILE ON APPROACH TO THE BASE. LANDED THE ACFT & VERIFIED THERE WAS NO EVIDENCE OF FIRE OR SMOKE IN ENG BAY AREA. THE MECHANIC ALSO VERIFIED THE PILOTS FINDINGS. CYCLED THE FIRE TEST SWITCH NUMEROUS TIMES & FOUND THAT THE LIGHT WOULD NOT EXTINGUISH. THE SWITCH WAS DETERMINED TO BE THE SOURCE OF THE DISCREPANCY. THE FIRE TEST SWITCH WAS THEN R & R. THE ACFT WAS SUBSEQUENTLY RETURNED TO SERVICE, FOLLOWING A SUCCESSFUL OPERATIONAL CHECKOUT.