What was found
DURING FLIGHT 3023, F/O'S SIDE AVIONICS, INFLIGHT EHSI NORMAL EXCEPT RED HEADING FLAG, EADI PITCH MISSING, COLOR GONE, AHRS FAILURE, ALSO AUTO PILOT/YD FAILED. LANDS HARD AND FLYS CROOKED. AIR RETURN TO MSP. MAINTENANCE REMOVED AND REPLACED NR 2 AHRS COMPUTER (P/N 622-6190-113). SN/ON 2681, SN/OFF 2917. NR 2 AHRS OPS CHECKS GOOD IAW SF340 MM CHAP 22.