As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(SUPPORT TASK) MAIN CABIN FLOORBEAM STA 328 HAS CORROSION ON UPP ER FLANGE AT APPROX. RBL 40. TRANSCRIBED FROM HAECO GSO NRC 92 84510. REMOVED 0.053" OF CORRODED MATERIAL FROM ORIGINAL 0.125" MAT THICKNESS. REMAINING 0.072" MAT THICKNESS FOUND TO BE OUT OF LIM ITS PER B737-900 SRM 53-10-51-1A-1. REPAIRED STA 328 FLOORBEAM I AW B737-900 SRM 53-10-51-2R-11. HAECO GSO MECH V901143