As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN EMERGENCY LIGHTS FLICKERED IN FLIGHT WITH PROP DE-ICE SELECTED. INSPECTED AND CLEANED BRUSH BLOCKS ASSY ON NR 1 AND NR 2 ENGINES. R & R EMERGENCY CONTROL BOX. RAN ACFT AND CHECKED PROP HEAT. NO DISCREPANCIES NOTED. OK FOR SERVICE.