As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THE AILERON TRIM FREEZES UP IN FLIGHT. TROUBLESHOOTING SUSPECTED MOISTURE IN THE AILERON TRIM ACTUATOR. THE AILERON TRIM ACTUATOR WAS DISASSEMBLED CLEANED AND REGREASED, THE ACTUATOR WAS ASSEMBLED AND OPS CHECKS WERE SATISFACTORY IAW THE MM 27-10-00 AND THE CMM 27-10-01.