abstract:The wing box of an airplane is the structural component from which the wings extend. It is usually limited to the section of the fuselage between the wing roots, although on some aircraft designs, like the Boeing 787, it may be considered to extend further.
Butin 2008, the firmfound thatthe 787'scarbon-fibre "wingbox", the internalfuselagestructure the wings attach to, was not strong enoughandneeded stiffening with metalspars.