As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER OPERATING A SINGLE SURFACE DE-ICE CYCLE THE OTBD WING DE-ICE BOOTS WOULD NOT DEFLATE. TROUBLESHOT SYS AND FOUND DISTRIBUTOR VALVE UNSERVICEABLE. DISTRIBUTOR VALVE REPLACED WITH O/H UNIT. OPS CHECK COMPLETED, SYS FUNCTION NORMAL.