As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
3158 - L WING ANTI ICE CAUTION MESSAGE IN FLIGHT. C/W QRH MESSAGE CLEARED AND LEFT ICING CONDITIONS MESSAGE OCCURED BETWEEN CLIMBOUT AND CRUISE WITH WING ANTI ICE SELECTED ON. L WING SHOWED YELLOW ON SYNOPTIC MESSAGE CLEARED WHEN 14TH STAGE ISOL VALVE OPENED AIRCRAFT REMOVED FROM SERVICE REMOVED AND REPLACED LH PRESSURE SW IAW AMM 30-12-10. OPS CHECK GOOD