As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING THE REPLACEMENT OF FRAME 574 THE INTERCOSTAL FOR THE CARGO DOOR SUPPORT STRUCTURE WAS DAMAGED. THE INBOARD FLANGE WAS BENT AND TWO CRACKS DEVELOPED.THE DAMAGED FLANGE WAS CUT OFF AND A REPAIR ANGLE WAS FABRICATED AND INSTALLED I/A/W WVAC EO 601R-53-3416.