As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AILERON LOCKOUT EICAS ADVISORY MESSAGE DISPLAYED. EITHER OR BOTH AILERON LOCKOUT ACTUATOR UNLOCKED WHEN IT SHOULD BE LOCKED, OR LOCKED WHEN IT SHOULD BE UNLOCKED OR FAILED. AIRCRAFT SEEMS TO FLY NORMALLY. REPLACED LT OTBD AILERON LOCKOUT ACTUATOR IAW AMM27-11-16. ACCOMPLISHED RII ITEM 0522001ON LT OTBD AILERON LOCKOUT ACT INSTALLATION, CHECKED GOOD.