As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD-JFK - FLT 6501 - DURING CLIMB, MADE AN UNSCHEDULED LANDING DUE TO RED GEAR HANDLE WARNING LIGHT ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED UPLOCK MICROSWITCH, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)