As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE-OFF, WHEN GEAR LEVER WAS MOVED TO -OFF- POSITION RT MAIN GEAR DOOR RE-OPENED. LEVER WAS MOVED TO -UP- AND DOOR CLOSED. RETURNED LEVER TO -OFF- AND DOOR STAYED CLOSED. VISUALLY INSPECTED DOOR AND OPERATING MECHANISM. NO PROBLEMS FOUND. OPERATED GEAR DOORS AND FOUND NORMAL.