What was found
OUTBOUND OF DTW, THE LT AND RT INTAKE HEAT LIGHTS WOULD ILLUMINATE ON FLIGHT 2984. MAINTENANCE REPLACED DE-ICE PANEL P/N 7239042-503, S/N ON FFV989 AND WEU P/N 006WS00. MAINTENANCE REPLACED THE LT DE-ICE MODULE P/N 44730-1, S/N OFF A00061, S/N ON A00462. RAN AC FOR 30 MINUTES NO FAULTS ILLUMINATED ALL CHECKS GOOD AT THIS TIME.