What was found
FOLLOWING GEAR HANDLE SELECTION TO UP, RECEIVED GEAR DISAGREE CAUTION. NO ADVERSE HANDLING CHARACTERISTICS, VIBRATIONS OR INCREASED FUEL BURN. COMPLIED WITH QRH, DECLARED EMERGENCY AND RETURNED TO LAND IN KMEM. WHEN GEAR HANDLE MOVED TO DN, ALL INDICATIONS WERE NORMAL AND A NORMAL LANDING WAS ACCOMPLISHED. EMERGENCY DECLARED. REMOVED AND REPLACED NOSE GEAR RETRACT ACTUATOR.