As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAR - THE CREW ELECTED AN AIR TURN BACK AFTER THE NR 2 EADI AND EHSI WENT BLANK/INOP FOLLOWED BY A SMALL AMOUNT OF ELECTRICAL SMOKE IN THE COCKPIT. THE LANDING WAS UNEVENTFUL. THE NR 2 VERT GYRO AND NR 2 EHSI WERE SATISFACTORILY REPLACED. (M)