As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 0789 - IAH - THE RIGHT MLG RED LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION DEPARTING IAH. CYCLING THE GEAR DID NOT HELP. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE RIGHT MLG UPLOCK SENSOR INOPERATIVE. THE RIGHT MLG UPLOCK SENSOR WAS REMOVED AND REPLACED IAW MM 32-61-21. THE GEAR WAS RETRACTED AND GEAR INDICATION WAS VERIFIED NORMAL. (M)