As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLT 8954 - THE LT MLG RED LIGHT CAME BACK ON AFTER GEAR RETRACTION. CYCLING THE GEAR WAS NO HELP. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE LT MLG UPLOCK SENSOR TARGET OUT OF RIG. THE SENSOR/TARGET WAS SHIMMED IAW MM 32-61-21. THE GEAR WAS SWUNG AND ALL INDICATIONS CHECKED GOOD. (X)