As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GSO - FLT 2338 - AFTER DEPARTURE FROM PHL AND GEAR RETRACTED, THE RIGHT MLG DOWNLOCK LIGHT REMAINED ILLUMINATED. FLIGHT DIVERTED TO GSO AND LANDED WITH NO FURTHER INCIDENT. MAINTENANCE TROUBLESHOT SYSTEM TO A BAD DOWNLOCK SENSOR. THE RIGHT MLG DOWNLOCK SENSOR WAS REMOVED AND REPLACED. OPS CHECKED GOOD. (X)