As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON HEAVY MAINTENANCE CHECK, FOUND LT WING TOP SKIN LOWER SURFACE T/E OVERHANG CORRODED BETWEEN RIB 15-16. REPAIRED CORRODED AREA AT LT WING TOP SKIN LOWER SURFACE T/E OVERHANG RIB 15/16 IAW SRM 51-21-11, RI 572-58616 AND EC A15-116-01.