As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEPARTED OUT ON TIME, DURING CLIMB OUT THE RMI & HSI COMPASS CARDS BEGAN TO SPIN. THE RMI FLAGGED HDG & HSI FLAGGED COMPASS AS THE PILOT ENTERED IMC CONDITIONS. THE PILOT ADVISED AIR TRAFFIC CONTROL HE NEEDED TO RETURN. RETURNED FOR MX. REPLACED REMOTE DIRECTIONAL GYRO.