As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CARGO DOOR UPPER SILL STA 495 STR 3L CRACK ORIGINATING FROM FASTENER. REMOVED FASTENER AND VERIFIED CRACK, REMOVED MAIN CARGO DOOR UPPER SILL AT STA 480 TO 530 AND ATTACHING SUPPORTS, LOCATED AND DRILLED NEW SILL AND INSTALLED NEW SILL AND ATTACHING SUPPORTS IAW DWG 53FX1467 AND EA 7-5310-135523.