As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/LGA - FLT 6167 - DURING CRUISE AT 0900 HRS ON 5-20-97, MADE AN UNSCHEDULED LANDING AT IAD DUE TO LT PROP HEAT FAILED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED PROPELLER BLADE DE-ICE LEAD, OPS CHECK OK. AIRCRAFT RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)