As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LONGITUDINAL FLOORBEAM OVER THE CENTER WING AT RBL 24 WAS FOUND WITH A CRACK IN THE BEAM WEB DOUBLER AT FS 678 AND IN THE FLOOR BEAM UPPER CHORD AT FS 674. THE CRACKED WEB DOUBLER AND UPPER CHORD WERE REMOVED. A NEW WEB DOUBLER AND CHORD WERE INSTALLED ALONG WITH THE BEAM MODIFICATION PER BAC S/B 737-57-1139. THE REPAIR WAS ACCOMPLISHED PER ER/A 380722-14, REV A.