As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING BC4 CHECK DISCOVERED NON-CPCP RELATED CORROSION ON THE R-2 DOOR FLOOR PANEL. NO CORROSION REMOVAL LIMITS WERE AVAILABLE IN THE SRM. MAINTENANCE REMOVED AND INSTALLED NEW R2 DOOR FLOOR PANEL FROM FR 66 TO FR 68 AT WL Z-240 AND BL Y-1295 TO BL Y-1325.