As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AN OPERATOR REPORTED THE FOLLOWING: IN FLIGHT THE FOLLOWING DE-ICE BOOTS ARE PARTIALLY INFLATED WITH THE SELECTOR OFF: LEFT NR 2, 3 & 4, RIGHT NR 4, DE-ICE PRESS 18 PSI. INBOARD DISTRIBUTING VALVE ON PORT WING CHANGED IAW. AMM 30-10-16.SINCE REPLACING THE LEFT-HAND INBOARD DE-ICE DISTRIBUTOR VALVE, THE DEFECT HAS NOT RE-OCCURRED.