What was found
GEAR DISAGREE ON DEPARTURE FOLLOWED BY STEERING INOP. RAN GEAR DISAGREE QRH AND GOT LANDING GEAR DOWN AND LOCKED. THE STEERING INOP MESSAGE PERSISTED SO WE RAN THAT QRH AS WELL AND LANDED BACK IN LAX WITHOUT NOSE WHEEL STEERING. UPON POST FLIGHT INSPECTION, FOUND NOSE LANDING GEAR STRUT COMPLETELY COLLAPSED WITH FLUID LEAKING FROM IT. (FLIGHT 3039 - FILED CLOSED) PLEASE REFERENCE AML 730184 PLEASE REFERENCE AML 730187 . REMOVED AND REPLACED NLG STRUT ASSY IN REFERENCE TO CRJ 700 AMM 32-21-01. SERVICED NLG STRUT ASSY WITH FLUID AND NITROGEN IN REFERENCE TO CRJ 700 AMM 12-12-32. SWUNG NLG 5 TIMES. PERFORMED OPS CHECK OF STEERING IN REFERENCE TO CRJ 700 AMM 32-51-00. OPS CHECK GOOD AT THIS TIME.