As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM, AHRU NR 1. AIRCRAFT WAS SENT TO THE HANGAR AND DURING CHECK WERE DETECTED RT RMI FLAGS. AHRU NR 1 WAS REPLACED AND DURING WORKS THE SAME FAILURE APPEARED ON RT SIDE. AHUR NR 2 AND FLUX VALVE WERE REPLACED IAW 34-21-10 AND 34-21-06. AHRU NR 1 WIRING WAS CHECKED WDM 34-22-01.