As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF PUT LANDING GEAR LEVER UP AND RIGHT MAIN UNSAFE LIGHT REMAINED ILLUMINATED. CYCLED GEAR DOWN- 3 GREEN, NO RED RETRACTED GEAR AGAIN, RIGHT MAIN UNSAFE LIGHT REMAINED ILLUMINATED. REMOVED AND REPLACED RIGHT MLG UPLOCK ACTUATOR PER MM.