What was found
AHRS #1 & 2 FAILED, HEADING RED "X", LOSE OF SYNTHETIC VISION; GRS #1 S/N: 45T003846, GRS #3 S/N: 45T003702, GMU #1 1CM0333444. GMU #2 S/N: 1CM033471, REMOVED, INSPECTED, REINSTALLED. AHRS SYSTEM POST-MX CHECK PERFORMED. AHRS ADJUSTMENT/TEST, PITCH/ROLL OFFSET CALIBRATION, MAGNETOMETER CALIBRATION, HEADING OFFSET CALIBRATION PERFORMED. OPS CHECKED GOOD.