As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN ANNUAL INSPECTION OF THE AIRCRAFT THE LT AILERON ASSEMBLY WAS FOUND TO HAVE A CRACK IN THE OB SKIN. PROBABLE CAUSE OF CRACKING OF THE LT AILERON ASSEMBLY IS UNKNOWN. AILERON REMOVED FOR MAINTENANCE AND REPAIRED BY REPLACING DAMAGED PART. (K)