As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COPILOT'S GLIDESLOPE REMAINS CENTERED AT ALL ITEMS ON ILS APPROACH. NO FLAG ON HSI. TROUBLESHOOTING REVEALED THAT PINS ON RELAY M39016/6-209L OR CONTACTS ON PRINTED CIRCUIT BOARD WERE DIRTY OR OXIDATED. RELAY K1 IN RELAY BOX PL-A. SAME RELAY FOR GLIDESLOPE UP/DOWN. ALSO, PULLS FLAG. SUBMITTER RECOMMENDED VISUAL INSPECTION OF PCB AND RELAYS ON ANNUAL BASIS.