As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INADVERRTENT ACTIVATION OF ANTI-ICE SYSTEM ON GROUND, RESULTING IN DAMAGE TO ANTI-ICE BOOTS WAS CAUSED BY AN INTERMITTENT GROUND OF CIRCUIT THAT IS NORMALLY OPEN. THE WIRE NR H255A20 RUNS FROM THE CONTROLLER TO THE REMOTE CIRCUIT BREAKER. (K)