As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LEFT COWL ANTI ICE VALVE WOULD NOT OPEN. THE AIRCRAFT DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE TOUBLESHOT, REMOVED, REPLACED, AND OPERATION CHECKS WERE ACCOMPLISHED USING AIRCRAFT MANUALS. AIRCRAFT WAS RELEASED FOR SERVICE.