As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS AILERON LOCKOUT AT 300 KNOTS. AN EMER WAS DECLARED & THE FLIGHT RETURNED WITHOUT FURTHER INCIDENT. ACFT WAS REMOVED FROM SERVICE. R & R RT AILERON LOCKOUT MECHANISM IAW MM 27-11-44, RIG & OPERATIONAL CHECKED GOOD. ACCOMPLISHED RT AILERON LOCKOUT ACTUATOR & MECHANISM TEST, TESTED GOOD IAW MM 27-11-44. SEE ALSO SDR AALA20151124005.