What was found
DURING D-CK, CORROSION FOUND ON LT FLAP INSIDE SURFACE OF UPPER AND LOWER SKINS STA XFLS 199-211 AND ADJOINING RIB AT STA XFLS 201. ALSO, ON LDG EDGE NOSE RIB SUPPORT AT STA XFLS201. REMOVED CORROSION, INSTALLED NEW RIBS IAW SRM 57-01 PG 1.