A system for use in maintaining a turbine assembly, the turbine assembly including a plurality of blades (122, 125) and a plurality of vanes (123, 124), said system comprising: an insertion apparatus comprising a steering interface, an insertion end, a steering end opposite said insertion end, and a body extending from said insertion end to said steering end, wherein said insertion end is positionable proximate at least one blade of the plurality of blades using the steering interface; a service apparatus for use in maintaining the turbine assembly, said service apparatus including at least one maintenance device and an anchoring feature, wherein said service apparatus is proximate said insertion end of said insertion apparatus and is positionable in a plurality of orientations via said steering interface, and wherein said anchoring feature is configured to releasably couple said service apparatus to at least one blade of the plurality of blades; and characterized by: a guide apparatus configured to extend through a port of the turbine assembly and define a path for said insertion apparatus; wherein said body includes a first elastic sheet and a second elastic sheet, and wherein said first elastic sheet and said second elastic sheet extend from said steering end to said insertion end along a translation direction defined by said guide apparatus, said first elastic sheet and second elastic sheet include elastically deformable sheets that allows the first elastic sheet and the second elastic sheet to elastically bend through the guide apparatus in the translational direction while providing sufficient stiffness to allow forward forces on the steering interface to advance the insertion end, wherein said steering interface is coupled to said first elastic sheet and to said second elastic sheet at said steering end of said insertion apparatus, wherein said insertion end is positionable along the translation direction by moving said first elastic sheet and said second elastic sheet along the translation direction, and wherein said insertion end is rotatable about a direction perpendicular to the translation direction by moving said first elastic sheet and said second elastic sheet relative to one another. an insertion apparatus comprising a steering interface, an insertion end, a steering end opposite said insertion end, and a body extending from said insertion end to said steering end, wherein said insertion end is positionable proximate at least one blade of the plurality of blades using the steering interface; a service apparatus for use in maintaining the turbine assembly, said service apparatus including at least one maintenance device and an anchoring feature, wherein said service apparatus is proximate said insertion end of said insertion apparatus and is positionable in a plurality of orientations via said steering interface, and wherein said anchoring feature is configured to releasably couple said service apparatus to at least one blade of the plurality of blades; and a guide apparatus configured to extend through a port of the turbine assembly and define a path for said insertion apparatus; wherein said body includes a first elastic sheet and a second elastic sheet, and wherein said first elastic sheet and said second elastic sheet extend from said steering end to said insertion end along a translation direction defined by said guide apparatus, said first elastic sheet and second elastic sheet include elastically deformable sheets that allows the first elastic sheet and the second elastic sheet to elastically bend through the guide apparatus in the translational direction while providing sufficient stiffness to allow forward forces on the steering interface to advance the insertion end, wherein said steering interface is coupled to said first elastic sheet and to said second elastic sheet at said steering end of said insertion apparatus, wherein said insertion end is positionable along the translation direction by moving said first elastic sheet and said second elastic sheet along the translation direction, and wherein said insertion end is rotatable about a direction perpendicular to the translation direction by moving said first elastic sheet and said second elastic sheet relative to one another.