As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING A FUNCTIONAL CHECK FLIGHT; AUTOPILOT ENGAGEMENT BOTH CMD A AND CMD B HAD A PRONOUNCED AILERON DISPLACEMENT TO THE LEFT. CMD B ENGAGEMENT WAS SIGNIFICANTLY WORSE THAN CMD A.. REPLACED FLIGHT CONTROL COMPUTER B PER AMM 22-11-33-401.