As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT BEGAN A SERIES OF UNCOMMANDED YAWS IN BOTH DIRECTIONS AND BECAME MORE NOTICEABLE UPON DESCENT TO LANDING EVEN WITH AUTOPILOT ENGAGED AND DISENGAGED. (FLT 7374) REPLACED FCC NR 2 IAW AMM. OPS CHECKED GOOD AT THIS TIME. P/N: 622-9815-904 S/N ON: 393 S/N OFF: 1113