As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LCQ - MAJOR REPAIR - DURING C-09 CHECK EXFOLIATION CORROSION WAS FOUND ON CABIN FLOOR HAT CHANNEL BETWEEN BS 1697 AND BS 1716, AT RBL 7. MAINTENANCE REMOVED CORRODED HAT CHANNEL FROM BS 1697 TO BS 1716, RBL 7; FABRICATED A NEW REPLACEMENT HAT CHANNEL PER DWG 146N5300; INSTALLED REPAIR PART IAW B757-200 SRM 51-40-02.