As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKE OFF CA AN FO FLIGHT DIRECTOR WENT OFF. DID RESET THEM GOT CA FO BACK AND THEN REALIZED FO COMPAS ROSE WAS MISSING. MAP MFD CLEARED ON LANDING ON FO SIDE. GROUNDED - YES. AIR TURNBACK - PERFORMED ADIRU BIT PROCEDURE REF AMM 34-31-00. NO FAULT NOTED FO'S COMPASS DISPLAY NORMAL. SEAMC NOTIFIED.