As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WING ANTI-ICE SWITCH ON OR OFF, ANTI-ICE DUCT MASTER WARNING MESSAGE ILLUMINATED. COMPLIED WITH QRH PROCEDURES. RETURNED TO SLC. REPLACED LEFT WHEEL WELL DUCT LEAK DETECTOR. P/N ON 35548-3-255, OPS CHECK GOOD IAW 36-12-00 AND 36-21-04.