As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) COMPASS SYSTEMS MISMATCHED. NR 1 INDICATED 020 DEGREES, NR 2 INDICATED 008 DEGREES, C14 INDICATED 040 DEGREES, AND THE STANDBY INDICATED 50 DEGREES. AFTER UNEVENTFUL LANDING ALL COMPASSES INDICATED WITHIN + OR - 1 DEGREE. THIS IS A KNOWN PROBLEM AND A NEW AHRS IS IN DEVELOPMENT TO REPLACE THE AH600 FOR OPS ABOVE 79 DEGREES MAGNETIC DIP ANGLE.