As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6454 - IAD-DET - DURING CRUISE, AIRCRAFT MADE AN UNSCHEDULED LANDING AT IAD DUE TO LEFT PROP HEAT FAILED IN ICING CONDITIONS. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED LEFT NR 4 PROP DE-ICE BOOT. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)