As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CONTROL CHECK, NO GREEN BOX ON RT AILERON. RETURNED TO GATE. FOUND RT INBD AILERON DROPPED WITH HYD POWER ON, FURTHER INSPECTION FOUND RT INBD ACTUATOR DETACHED FROM WING STRUCTURE, ALL FOUR BOLTS PULLED OUT FROM ACTUATOR. REMOVED AND REPLACED RT INBD AILERON ACTUATOR IAW AMM 27-13-20-4.