What was found
FOUND STRINGER 20R AT FS 310-349, TO BE CORRODED WITH DEEP PITTING DAMAGE. REMOVED STRINGER AT 20R FS 310-349, DUE TO DEEP PITTING CORROSION FOUND IAW SRM 51-42-06-001-001 & 51-42-21-001-01. INSTALLED FASTENERS IN STR20, FROM FS 310-FS 349 COMMON TO SKIN & STRINGER REF DWG SH670-31950 & SH 670-32-420. THIS REPAIR IS CLASSIFIED AS A MAJOR REPAIR IAW SOP 5702. LOCATED FASTENER HOLES COMMON TO SKIN PANEL AND ATTACHING INTERCOSTAL ON SERVICABLE STRINGER IAW SRM 51-40-11-001-001-A01 AND DWG SH670-32420. INSTALLED FASTENERS IN STR 20 COMMON TO STR 20 & INTERCOSTAL REF DWG SH670-31950 & SRM 51-42-06-001-001. INSTALLED INTERCOSTAL GUSSETS FS 310 & 349 AND ATTACH CLIPS ON UPPER LOG OF INTERCOSTAL REF DWG SH670-31950 & SRM 51-42-21-001-0010.