What was found
NOSE DOOR OPEN ON GEAR RETRACTION (FLIGHT 3865 - FILED CLOSED) UPON ARRIVAL ON THE AIRCRAFT FOUND NLG TOW COLLAR MIGRATED UP, AGAINST NLG OLEO CENTERED/EXTENDED SENSOR. DEFERRED TOW COLLAR, PLEASE REFERENCE AML 841860. / INSPECTED THE BRACKET AND SENSOR NO DAMAGE NOTED. ADJUSTED THE NGL OLEO CENTERED SENSOR REF TO CRJ 200 AMM 32-61-05. PERFORMED GEAR SWING REF CRJ 200 AMM 32-30-00, GEAR EXTENSION / RETRACTION OPS CHECK GOOD AT THIS TIME.