As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT ON THE FLIGHT CONTROL CHECKOUT AILERON CONTROL WHEEL IS BINDING AND WILL NOT RETURN TO NEUTRAL. FOUND WORN BEARING IN ARM ASSY OF AILERON FEEL CENTERING UNIT. REMOVED AND REPLACED ARM ASSY REF B 737 AMM 27-11, PERFORMED AILERON FEEL AND CTR UNIT ADJ/TEST, OK FOR SERVICE.