What was found
FLT NR 1862 - DEN - THE NOSE GEAR RED UNSAFE LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION AND WAS ACCOMPANIED BY NOSE GEAR VIBRATION. THE GEAR WAS EXTENDED FOR RETURN TO DEN AND THERE WAS A LOUD THUMP WHEN NOSE GEAR LOCKED DOWN. A TOWER FLY-BY WAS CONDUCTED AND THE GEAR WAS CONFIRMED DOWN AND LOCKED. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPACKED AND SERVICED THE NLG IAW MM 32-21-02. THE UPPER AND LOWER BEARINGS AND INNER AND OUTER CYLINDERS WERE INSPECTED WITH NO ABNORMALITIES FOUND. A GEAR SWING WAS PERFORMED AND OPERATION AND INDICATIONS WERE GOOD. (M)