As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER TAKE OFF UPON GEAR RETRACTION NOSE GEAR LIGHT RED UNLOCK ILLUMINATED, THE AIRCRAFT RETURNED TO DFW WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. (NO EMERGENCY WAS DECLARED) ALL NORMAL REPLACED NOSE LANDING GEAR UP LOCK ACTUATOR ASSEMBLY PER TASK CARD 26L70032005.