As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION LEVEL 2 CORROSION WAS FOUND ON THE AILERON "TEE PICKUPS" (TEE CLIPS) ON THE LEFT AILERON ASSEMBLY. THE EXFOLIATION CORROSION WAS ALONG THE EDGES AND SIDES OF THE FITTINGS. REFERENCE: ATR 42 SRM 57-61-10 P 115/116 FIG 1. REASON FOR INSPECTION MRB 576108-01.