What was found
MCN - MAJOR REPAIR - "C" - DURING C-17 CHECK CENTER KEEL PANEL RIVETS WORKING ALONG ALL 4 SIDES, AND CENTER OF PANEL APPEARS TO BE WAVY. MAINTENANCE REMOVED CENTER KEEL PANEL, LEVELED AIRCRAFT, FABRICATED NEW CENTER KEEL PANEL, AND INSTALLED REPAIR IAW AWA ER 03-5331-02071-TB2.