As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2125, RIGHT ELEVATOR HORN HEAT CAME ON DURING CLIMB, THEN STARTED CYCLING OFF WHILE RIGHT STALL WARNING LIGHT ILLUMINATED. BOTH LIGHTS CYCLED OPPOSITE DURING REMAINDER FO FLIGHT. MAINTENANCE INSPECTED PROP BRUSHBLOCKS NR 1 AND NR 2. FOUND NR 2 BRUSH BLOCK HEAVILY BURNED AND NR 1 WAS DETERIORATED. REPLACED BRUSH BLOCKS IAW DHC-8-200 AMM 61-20-11-000-801, 61-10-11-400-801. CLEANED AREA AND INSTALLED 2 NEW FUSES. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.