As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6500 - IAD-LGA - TAKEOFF ABORTED DUE TO RT PROP DE-ICE FAILED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED PROP TEST BOX, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)