As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RED NOSE GEAR UNSAFE LIGHT ILLUMINATED AND THE NOSE GEAR WOULD NOT EXTEND WHEN GEAR HANDLE WAS LOWERED ON APPROACH TO IAH. THE GEAR WAS CYCLED DURING A GO-AROUND AND THE GEAR EXTENDED NORMALLY WITH NORMAL INDICATIONS. MAINTENANCE FOUND THE NLG LOCK ACTUATOR AT FAULT. THE NLG LOCK ACTUATOR WAS REMOVED AND REPLACED IAW MM 32-33-21. THE GEAR WAS CYCLED 10 TIMES AND ALL OPERATION CHECKED NORMAL.