As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT MASTER CAUTION AND LEFT FIRE WALL FUEL VALVE LIGHT FLICKERED. CREW LANDED WITHOUT INCIDENT. AFTER LANDING LEFT FIRE LOOP WOULD NOT TEST. FOUND FIRE LOOP GROUNDING AT THE FIREWALL WIRE HARNESS FEED THRU. WIRE HARNESS FEED THRU WAS ADJUSTED TO PREVENT THE FIRE LOOP FROM GROUNDING, OPERATIONAL CHECKS PERFORMED WITH NO OTHER DEFECTS NOTED.