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 A T-FITTING IN THE AILERON S/N 1257, P/N S57610250-001, MFG DATE 08/92. THE T-REPLACED HAD EXFOLIATION CORROSION ALONG THE FITTING EDGES. LOCATED AT THE CENTER OUTBOARD SECTION. REF ATR42 SRM 57-61-10 FIG 101. REASON FOR INSPECTION: MRB 576108-01 (8 YEAR INTERVAL).