What was found
PROP DE-ICE CAUTION LIGHT ILLUMINATED A FEW SECONDS EVERY TIME NR 1 PROP DE-ICE, GREEN LIGHT ILLUMINATED. RETURNED TO FIELD. LANDING UNEVENTFUL. CLEARED FAULTS AND PERFORMED FUNCTIONAL TEST OF THE PROPELLERS DE-ICING SYS IAW AMM 30-61-00-720-801. FOUND FAULTS OPEN HEAT, OPEN PHASE C, NR 1 PROP. FOUND NR 1 PROP, NR 3 DE-ICE HARNESS OPEN, REPLACED NR 1 PROP, NR 3 DE-ICE HARNESS WITH NEW FROM STOCK IAW AMM 61-10-06-000-805/ 400-805. OPS CHECK GOOD. NO FAULTS IN CDS. NO FURTHER DEFECTS NOTED. RETURNED TO SERVICE.