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 AT BS 1682, LBL 4. MAINTENANCE REMOVED CORRODED HAT CHANNEL FROM BS 1690 TO BS 1716, LBL 4; FABRICATED A NEW REPLACEMENT HAT CHANNEL PER DWG 146N5300; INSTALLED REPAIR PART IAW B757-200 SRM 51-40-02.