As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOPILOT NR 2 WOULD NOT TRACK LOCALIZER IN APPR MODE. DEVIATED UP TO 10 DEG LEFT AND RIGHT OF LOC HDG WITH CALM WIND. DURING TROUBLESHOOTING, FOUND MA TRIPPED FOR NR 2 AP/FD LOGIC/MONITOR COMPUTER ON AFCS TEST PANEL. PERF COMP TEST WITH FAULT CODE OF 52. SWAPPED NR 1 & NR 2 LOGIC/MONITOR COMPUTERS FOR FURTHER TROUBLESHOOTING. PERFORMED OPS OK W/CO, OPS NORMAL.