As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUPPORT TASK: MAIN CABIN FLOOR STRUCTURE STA 986 AT RBL 20-30 HAS CORROSION. TRANSCRIBED FROM HAECO GSO NRC 9280232. REMOVED AND REPLACED DAMAGED WEB IAW B737-900ER SRM 51-40-02. ORIG THICKNESS .063", REMOVED .016", REMAINING .047 AND FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-70-51-1A-1. FABRICATED NEW WEB IAW BAC DWG 147A5701 REV-. HAECO GSO MECH V940741