As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON BOTH UPPER AND LOWER SURFACES OF INTERCOSTAL LOCATED APPROX. 9 IN. FWD. OF R2 DOOR STA. 947, RBL49. AREAS MARKED IN RED. GROUNDED - YES. CORROSION FOUND TO BE OUT OF LIMITS REF B737-800 SRM 53-70-51. ORIGINAL THICKNESS IS .090, REMAINING IS .045, .045 WAS REMOVED.REPLACED INTERCOSTAL REF BAC DWG 147A5650 SH 70 & 71 REV "A" PO# 999527.1.