As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT GEAR UNSAFE LIGHT REMAINED ON AFTER GEAR RETRACTION. UPLATCH CHECK FAILED (GEAR DOOR OPEN LIGHT CAME ON AND GEAR EXTENDED). WHEN THE GEAR HANDLE WAS PLACED IN UP POSITION, RIGHT GEAR UNSAFE LIGHT AND GEAR DOOR OPEN LIGHT WENT OUT. RIGHT GEAR RETRACTED NORMALLY. ADJUSTED AND TESTED RIGHT MAIN GEAR DOOR LATCH MECHANISM IAW DC-9 MM 32-31-04. OPS CHECKED GOOD.