What was found
THE RED NOSE GEAR UNSAFE LIGHT REMAINED ILLUMINATED WHEN GEAR WAS RETRACTED AFTER TAKEOFF. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. A NOSE GEAR SWING WAS PERFORMED IAW MM 32-61-00, PAGE 501 TO 504 AND ALL GEAR OPERATION AND INDICATIONS WERE NORMAL. THE M983 AND M1215 LOGIC CARDS WERE REMOVED AND REPLACED AS A PRECAUTIONARY MEASURE PER MM 32-09-20. BOTH CARDS TESTED NORMAL. ANOTHER GEAR SWING WAS PERFORMED AFTER CARD REPLACEMENT WITH NO FAULTS NOTED.