As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON FLOOR SUPPORT AT STA 306, LBL12 (CIRCLED IN RED). GROUNDED - YES. REMOVED CORROSION. ORIGINAL THICKNESS 0.071, REMAINING THICKNESS 0.013, REMOVED 0.058. OUT OF LIMITS IAW B737-900ER SRM 53-10-51-1A-1. REMOVED DAMAGED FLOOR SUPPORT/INTERCOSTAL IAW B737-900ER SRM 51-40-02. DRILLED TO FIT NEW FLOOR SUPPORT/INTERCOSTAL AND INSTALLED NEW FLOOR SUPPORT/INTERCOSTAL IAW B737-900ER SRM 51-40-05, B737-900ER SRM 51-40-02 AND BAC DWG141A5600 REV-.