As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT DURING FLIGHT A CAS MESSAGE WAS DISPLAYED INDICATING "FAULT CODE" AND "DEGRADED GAUGING". THE MAINTENANCE TEAM TROUBLESHOT AND DETERMINED THAT THE LEFT OTBD WING TANK GAUGE (L40QJ) WAS DEFECTIVE AND WAS REPLACED WITH NEW. FUNCTIONAL TEST AND LEAK CHECKS WERE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.