As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEADING EDGE DEICE BOOT (MIDDLE/BOTH WINGS) INOP IN FLIGHT. RETURNED TO SLC. WORKS FINE ON GROUND. REMOVED AND REPLACED WING MIDDLE DEICE EJECTOR VALVE GROUND. RAN AIRCRAFT AT LOW AND HIGH PRESSURE AND ALL BOOTS OPS AND LEAK CHECKS OK.