As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIII AND R/O ARM LIGHTS FAILED TO ILLUMINATE IN THE HAP DURING 2 CAT III APPROACHES. ABORTED APPROACH AND DIVERTED TO A UNEVENTFUL LANDING. MAINTENANCE RETURN TO SERVICE CATIII OPS TEST. OPS TEST GOOD. ACFT IS CAT III QUALIFIED. RETURNED TO SERVICE.