As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AN OPERATOR HAS EXPERIENCED A SECOND INCIDENT OF PITOT HEAT FAILURE WITH SUBSEQUENTLY LOSS OF AIRSPEED INDICATION CAUSED BY A POPPED CB.SIX WEEKS AGO THE SAME OPERATOR LOST BOTH AIRSPEEDS BY POPPED CBS PITOT HTR 1 AND 2 SIMULTANEOUS. MOISTURE HAS BEEN FOUND ON PITOT TUBE RECEPTACLES CAUSED BY WEAK SEALANT. BOMBARDIER AEROSPACE IS INVESTIGATING THE EVENTS.