As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT MAIN LANDING GEAR GREEN DOWN AND LOCKED LIGHT WOULD NOT ILLUMINATE. CREW RECYCLED LANDING GEAR. MAINTENANCE INSPECTED AND CLEANED THE RIGHT MAIN LANDING GEAR CANNON PLUG AND SWITCH. OPERATIONAL CHECKS WERE COMPLETED AND SATISFACTORY IAW DC-9 MM 32-60-01.