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 FOUND A COUPLING CRACKED ON THE HOOK TORQUE SHAFT. THE COUPLING IS NR 2 FROM FRONT END OF DOOR. THE CRACK RUNS FROM EDGE TO THROUGH BOLT HOLE. THE CRACK IS APPROX 1/2" LONG. THE DOOR IS A PEMCO STC.