As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRST OFFICER'S EHSI TURNED 30-40 DEGREES RIGHT WHILE CLIMBING STRAIGHT OUT. FIRST OFFICER'S RMI HEADING INFORMATION MATCHES CAPTAIN'S EHSI, RMI AND MAGNETIC COMPASS. RESET FIRST OFFICER'S HEADING BY SWITCHING FIRST OFFICER'S COMPASS COMPENSATOR MOMENTARILY TO DG MODE. NO ASSOCIATED FLAGS OR WARNINGS. REPLACED NR 2 AHRS COMPUTER AND PERFORMED ORIENTATION. OPS CHECK GOOD.