What was found
ERRATIC INDICATIONS ON BOTH PFDS DURING APPROACH. FLIGHT GUIDANCE INDICATED A RT TURN WHEN LOC NEEDLE WAS MOVING LT. LOC NEEDLE WAS SELDOM STEADY AND CONSTANTLY MIGRATING AROUND. HGS DISPLAY WAS VERY ERRATIC. 2 APPROACHES WERE CONDUCTED. GOOD IDENTS ON BOTH LOCS. NO PLDS IN OPERATION. R & R NR 1 AND NR 2 VOR/LOC ANTENNAS IAW MAINTENANCE 6345102. OPS CHECK GOOD. CW MAINTENCE 6343510, OPS CHECK GOOD. LLM RTS AND CAT 3 STATUS CONFIRMED IAW MAINENEANCE 6345102 AND 6343510. RETURNED TO SERVICE.