As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLOOR SUPPORT ANGLE AT FLOOR LEVEL AT FS280 BETWEEN LBL9 AND RBL9 IS CORRODED IN MULTIPLE LOCATIONS. REMOVED AND INSTALLED NEW ANGLE FLOOR SUPPORT BETWEEN LBL9 - RBL 9 AT FS 280.00 REF SRM 51-42-06-001-001-A01 AND DWG CC670-34010 REV -K. COMPLIED WITH TASK CARD 51-900-1002-SKY.