As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE EN ROUTE FROM KNOXVILLE TO PHILADELPHIA, FLIGHT 4016 DEVELOPED MULTIPLE PROBE HEAT PROBLEMS. THERE WAS ICING FORCASTED FOR PHILADELPHIA SO THE CAPTAIN AND THE DISPATCHER DECIDED TO HAVE THE FLIGHT DIVERT TO PITTSBURG WHERE THE WEATHER WAS VFR. MAINTENANCE INSPECTED AND REPLACED THE TOTAL AIR TEMPERATURE PROBE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 30-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.