As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6612 - IAD-JFK - DURING CRUISE, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO LEFT PROP HEAT FAILURE. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND GROUND RAN AIRCRAFT AND CHECKED LEFT PROP HEAT AND COULD NOT DUPLICATE, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)