As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE CHECK, FOUND LT WING AFT SPAR HAS CORROSION AT RIB 17 UNDER OVERHANG PANEL. REMOVED CORROSION AND FOUND LOWEST READING TO BE .137”, MATERIAL REMOVED WAS .060”. MATERIAL ORIGINAL THICKNESS WAS .197”. ACCOMPLISHED REPAIR ON LH WING TOP SKIN LWR SURFACE T/E RIB 17 IAW TDJ1S2291112014, ISSUE B AND EA A14-214-01.