As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE VISUALLY INSPECTING THE MAIN CARGO DOOR A CRACK WAS FOUND ON A HOOK TORQUE SHAFT COUPLING, 2ND FROM FORWARD END. THE CRACK IS FROM EDGE OF COUPLING TO A THROUGH BOLT HOLE. THE DOOR WAS MANUFACTURED BY PEMCO. THE CRACK EXTENDS APPROX 1/2" IN LENGTH.