As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT THE LANDING GEAR CAME UNHOOKED FROM THE UP POSITION IN FLIGHT. THE GEAR WAS EXTENDED AND THE AIRCRAFT LANDED. THE AIRCRAFT WAS JACKED AND THE GEAR CYCLED TO THE UP POSITION. WHEN ALL (3) UPLOCK SWITCHES WERE MADE THE RT MAIN GEAR FELL FROM THE WHEEL WELL. A DISTORTED AND CRACKED UPLOCK HOOK WAS FOUND. THE CRACK WAS FROM THE CENTER OF THE HOOK TO THE HOLE FOR THE UPLOCK SWITCH.