As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED ICE COND- ANTI ICE SYS INOPERATIVE WITH WING ANTI/ICE FAIL. AN ODOR THAT SMELLED LIKE BURNED CRAYONS ENTERED THE CABIN. ANTI-ICE WAS OBSERVED TO WORK INTERMITTENTLY. MX R & R DUAL TEMP CONTROL VALVE SLEEVES THAT WERE FOUND LEAKING. OPS CHECKS WERE SUCCESSFUL AND NO ODOR'S NOTED. ACFT WAS APPROVED FOR RETURN TO SERVICE.