As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OUTBOARD DOUBLER HOLDING AILERON TO WING (REINFORCES MOUNT) HAS CRACKS. FOUND ON THREE CONSECUTIVE AIRCRAFT DURING ANNUAL INSPECTION. THREE RIGHT OUTBOARD AND ONE LEFT OUTBOARD. SUBMITTER SUGGESTS COUNTERWEIGHTS FOR THE AILERON MAY BE CAUSING STRESS FRACTURES. SUGGEST AN ADDITIONAL PRE-FLIGHT CARD ITEM SHOULD BE ADDED TO PRE-FLIGHT CHECK LIST. CAN BE READILY SEEN IF LOOKED FOR.