As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROLL INDICATOR ON EFIS ILLUMINATED. QRH WAS C/W. FO ATTITUDE 10 DEG BANK WHEN WINGS LEVEL. AIR RETURN TO MEM. REMOVED AND REPLACED RT ATTITUDE AND HEADING COMPUTER IAW SAAB AMM 34-21-05-04. OPS CHECK GOOD, PN ON/OFF 622-6190-113, SN ON 3000 SN OFF 2033.