As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HCK CHECK AT QRO, INITIAL INSPECTION: CORROSION AT FLOOR STRUCTURE LBL 57 (FITTINGS) ON STA.312 AND STA.344 CPAX (W1). CORROSION LEVEL 2. FITTINGS (2EAS) ON STA.312 AND STA.344 WERE REPLACED PER B737-900ER SRM 51-40-02-0G PAR. 8 AND 9 DUE TO EXCESSIVE CORROSION DAMAGE IN REFERENCE B737-900ER SRM 51-10-02-0G PAR. 9 A (1) LP 2601791.