As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL, PRIOR TO ROTATION MAP DE-ICE LIGHT ILLUMINATES AS WELL AS OVERHEAD BOOTS PROPELLER AND ENGINE AIR LIGHT REMAIN ON. REPLACED DE-ICE MONITOR PERFORM OPS CHECKS GOOD. ALL DE-ICE SYSTEMS WITH BOTH ENGINE RUNNING AT HIGH POWER SETTING, OPS CHECKS GOOD AT THIS TIME.