What was found
WITH PROP DEICE SELECTED NORM, THE LEFT PROP CAUTION LIGHT ILLUMINATED AND THE LEFT PROP DEICE LIGHT WENT OUT. AIR RETURN TO MSP. MAINTENANCE FOUND BAD PROP LEAD, REPLACED NR 3 PROP BLADE LEAD PN 666000219, OPS CHECK GOOD PER DOWTY PROP CMM 61-10-39.