As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/PIT - FLT 6332 - DURING CRUISE AT 1820 HOURS ON 4-12-97, NOTED LT PROP HEAT CAPTION LIGHT ILLUMINATED. AIRCRAFT RETURNED TO IAD WHERE IT LANDED WITH NO PROBLEM. THE MAINTENANCE TECHNICIANS INSPECTED THE PROP HEAT DISCREPANCY AND REPLACED THE PROP MAT AND TESTED THE PROP DE-ICE SYSTEM IAW WITH ALL MAINTENANCE PROCEDURES. AIRCRAFT WAS THEN RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)