As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DE-ICE PRESSURE CAUTION LIGHT ILLUMINATED DURING CRUISE. COMPLIED WITH CHECKLIST AND NOTED DE-ICE PRESSURE NORMAL. OBSERVING ICE PROTECTION PANEL, NR 3 INBOARD BOOT ON RIGHT WING AND NR 4 INBOARD BOOT ON LEFT WING FAILED TO ILLUMINATE NORMALLY DURING CYCLE. MAINTENANCE REPLACED DUAL DISTRIBUTOR VALVE NR 3 ON LEFT HAND WING AND LEADING EDGE 513AL. OPERATIONAL AND FUNCTIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.