As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FROM KMIA THE CAPTAINS ADI DISPLAYED BOTH FLIGHT DIRECTOR AND GYRO FLAGS, FLAGS STAYED IN VIEW FOR APPROXIMATELY 1-2 MINUTES THEN WENT AWAY FOR APPROXIMATELY 5 MINUTES, THEN INTERMITTENTLY DISPLAYED AFTER THAT. THE CREW RETURNED TO KMIA AND LANDED. MAINTENANCE REPLACED THE NUMBER 1 FOG GYRO, INSTRUMENT AMPLIFIER AND THE NUMBER 1 ADI. THE OPERATIONAL CHECK WAS GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.