Thrust reverser inner fixed structure with corner fitting

A method is provided for providing, e.g. manufacturing, a thrust reverser inner fixed structure (602). The method includes providing an acoustic inner barrel (602) that includes a first honeycomb core (604) and an annular inner skin (630) radially inward of the first honeycomb core (604), providing a bifurcation panel (606) that includes a second honeycomb core (608) and arranging a corner fitting (610) between and attaching the corner fitting (610) to the acoustic inner barrel (602) and the bifurcation panel (606).