As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ICE BOOTS IN TIMERS 1 AND 2 FAILED IN LIGHT MODE. HEAVY MODE WAS OK. RETURNED TO SLC. INSPECTED DEICE SYSTEM. FOUND CHAFED WIRE ON DEICE VALVES. REPAIRED WIRES AS REQUIRED PER STP 20-0-00 AND OPS CHECK SYSTEM PER MM 20-00-00. OPS CHECKS GOOD.