As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD WET AREA INTERCOSTAL AT STA 278 TO STA 294.5 BL 0 HAS GOUGE ON LOWER SURFACE OF UPPER FLANGE. GROUNDED - YES. BLENDED AND CHECKED LIMITS @ INTERCOSTAL AREA ORI MAT .040, MAT. LOSS .021,REMAINING MAT .019 FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-10-51-1A-1. REMOVED AND REPLACED INTERCOSTAL @ STA 270 TO STA 294.5 IAW B737-900SRM 51-40-02, BAC DWG# 141A5400 REV.-.