Radially fastened fixed-variable vane system

A split case assembly for a gas turbine engine comprising:

• an outer diameter case defining a partial case structure for a gas turbine engine;
• a plurality of fixed-variable vanes attached to an inner diameter surface of said outer diameter case each of said fixed-variable vanes protruding radially inward from said outer diameter case;
• each of said fixed-variable vanes in said plurality of fixed-variable vanes being interfaced with one of a plurality of inner diameter boxes at a radially inward end of said fixed-variable vane, such that said inner diameter boxes define an inner diameter of a flow path and the outer diameter case defines an outer diameter flow path;
• and
• wherein each of said fixed-variable vanes are interfaced with said one of said plurality of inner diameter boxes through at least one inner diameter shoe in a plurality of inner diameter shoes.

A method for assembling a split engine case comprising:

• radially installing a plurality of fixed-variable vanes in an outer diameter fan case;
• sliding at least one inner diameter shoe axially, relative to an axis defined by said outer diameter fan case, such that a connection feature of each fixed vane portion of said fixed-variable vanes is received in a clearance hole, and such that a button portion of each variable vane portion of said fixed-variable vanes is received in a button hole in said inner diameter shoe;
• interfacing said at least one inner diameter shoe with a plurality of inner diameter boxes, such that each of said inner diameter boxes receives at least one of said connection features in a corresponding clearance hole, such that said inner diameter boxes define an engine flow path inner diameter;
• and
• securing each of said inner diameter boxes in place using a fastener connected to said connection feature.