As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION CORROSION WAS FOUND IN THE RAILS LBL 15/ RBL 15 ON FLOOR STRUCTURE BTW STA 500L AND STA 500K AT FWD CARGO COMPARTMENT. FLOOR RAIL STRINGER RBL 15 AT STA 500L WAS REPAIRED PER B737-900ER SRM 53-00-53-2R, PROCEDURE 3, REPAIR 3. CORROSION RAIL LBL 15 ON FLOOR STRUCTURE BTW STA 500L AND STA 500K WAS ATTENDED WITH NRC 00451.