As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT GEAR UNSAFE LIGHT STAYED ON WITH GEAR HANDLE IN THE UP POSITION. RECYCLED GEAR AND COMPLIED WITH ABX ABNORMAL PROCEDURES. FOUND THE MAIN LANDING GEAR POSITION WARNING SWITCH CAUGHT ON THE RIGHT GEAR DOOR LATCH STRIKER WHICH WAS LOOSE. INSTALLED SHIMMY ON STRIKER. TESTED RIGHT MAIN LANDING GEAR POSITION AND WARNING SWITCH IAW DC-9 MM 32-60-01-2-0101. OPS CHECKED GOOD.