As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) IN CRUISE , PILOTS TESTED THE DEICE SYSTEM AND WING DEICE BOOTS DID NOT SEEM TO INFLATE. INVESTIGATION FOUND THE LOWER GASKET BLOWN OUT OF THE PRESSURE REGULATING VALVE. IT APPEARS THAT CESSNA MAY HAVE FIXED PROBLEM AS THE NEW VALVES COME WITH DIFFERENT AND NEW GASKETS.