What was found
(CAN) "DURING CRUISE THE ICING CHECK WAS COMPLETED. AFTER DE-ICE BOOT SELECTOR SET TO OFF, THE LT SECOND FROM THE OUTERMOST OTBD DE-ICE BOOT LIGHT REMAINED ILLUMINATED. THE CORRESPONDING BOOT REMAINED INFLATED AND WAS UNABLE TO BE DEFLATED IN FLIGHT. THE CREW CONDUCTED THE QRH CHECKLIST TITLED DE-ICE BOOT ADVISORY LIGHT REMAINS ILLUMINATED, WHICH INVOLVED ADDING 15 KTS TO VREF, VGA, ETC. ACFT LANDED WITHOUT INCIDENT. ICING CONDITIONS NOT ENCOUNTERED DURING THE FLIGHT." MAINTENANCE REPORT: "LT OTBD DISTRIBUTOR VALVE REPLACED IAW MM 30-10-16, TESTED SERVICEABLE REF QL3, 1056196 FOR RETORQUE AND QL3 1056197 FOR SEALANT DEFERRAL. DISTRIBUTER VALVE FOUND TO BE STICKING IN THE ON POSITION."