As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND FRAME 11 CROSSBEAM UNDERNEATH FLOOR PANEL 221 ELF CORRODED. MAINTENANCE PERFORMED MAJOR REPAIR. REPAIRED/INSTALLED ANGLE DOUBLER AND FILLER ON FRAME 11 CROSSBEAM IAW ETD 2011-170-107801 REV A. FABRICATED ANGLE DOUBLER AND FILLER FROM 7475-T761 .050" PO 005208-2010. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.