As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT FOS ADI ERRATIC + - 5 DEGREES OF PITCH WITH NO ASSOCIATED FAILURE FLAGS. FOLLOW UP: AFTER TAKEOFF FOS ADI ROLLED TO 50 DEGREES BANK, 30 DEGREES NOSE UP. ATTITUDE DISPLAY LIGHT ON MAP. FOLLOWED QRH PROCEDURE AND RETURNED FOR LANDING.REMOVE AND REPLACE NR 2 AHRS COMPUTER IAW 34-21-00. OPS CHECK GOOD. FOLLOW UP: REMOVE AND REPLACE NR 2 AHRS COMPUTER (SUSPECT PREVIOUS UNIT WAS BAD OFF THE SHELF) IAW 34-21-00. OPS CHECK GOOD. PN ON 622-6190-204, SN ON 2100, SN OFF 2662.