As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - C - DURING C-13 CHECK LOOSE CHERRY MAX RIVETS WERE FOUND ON ALL 4 SIDES OF CENTER KEEL PANEL, PANEL WAS ALSO BUCKLED AND DISTORTED. MAINTENANCE DRILLED OUT RIVETS, REMOVED PANEL, FABRICATED A NEW PANEL, AND INSTALLED REPAIR IAW AWA ER 03-5331-02070-TB1.