What was found
ON TAKEOFF LANDING GEAR LEVER WOULD NOT RAISE GEAR OR MOVE UP WITHOUT USING DOWN LOCK RELEASE IAW QRH. AURAL WARNINGS CONTINUOUSLY AFTER RAISING GEAR. REPLACED NLG STRUT ASSY IAW AMM. SWUNG GEAR, SYS OPERATES NORMALLY, PN ON: 19730-100-15, SNON: 297, PN OFF: 19730-100-13, SNOFF: 238, PN: 20500-000-02, SNON: 97, SNOFF: 212.