What was found
MCN - MAJOR REPAIR - DURING C-16 CHECK 2 CRACKS WERE FOUND ON THE AFT CARGO DOOR LOWER BEAM (TEE CHORD) FORWARD END AT 2ND AND 3RD FASTENER HOLES ON VERTICAL LEG, CRACKS 1/8" AND 1/4" RESPECTIVELY. MAINTENANCE TRIMMED OUT FORWARD END OF TEE CHORD, FABRICATED A REPAIR DOUBLER AND FILLERS A, B, C, & D, AND INSTALLED REPAIR PARTS IAW EO 52-33-02.