What was found
GEAR DISAGREE EICAS MESSAGE. NOTED BY FLIGHT CREW THAT NOSE GEAR INDICATION REMAINED DASHED OUT. NLG NEVER INDICATED UP. GEAR SWING AND TROUBLESHOOTING. REPLACED DOOR OPERATED SEQUENCE VALVE, GEAR OPERATED SEQUENCE VALVE, PRIMARY LOCK SENSOR, AND NLG RETRACT ACTUATOR. PERFORMED LANDING RETRACTION TEST. ALL TESTS PASSED.