Abstract: Embodiments for commercial freighter configuration for aircraft with composite wings. One embodiment is cargo floor structure for a wing center section of an aircraft. The cargo floor structure includes over wing floor beams extending longitudinally between a rear spar and a front spar of the aircraft. The over wing floor beams are coupled with an upper skin panel of a composite wing. The cargo floor structure also includes intercostals extending spanwise across the over wing floor beams. The intercostals suspended over the upper skin panel of the composite wing. The cargo floor structure also includes a truss box structure disposed between a middle pair of the over wing floor beams and configured to shear a spanwise load from the intercostals into the upper skin panel of the composite wing.

Abstract: A nut cap assembly for securing an internal component to an external component includes a seal cap having a base and a shroud extending from the base. The base includes a mounting flange configured to be mounted to the internal component. The base includes an opening at a mounting end of the base configured to be mounted to the internal component. The base includes a seal groove surrounding the opening configured to receive a seal. The seal groove is open at the mounting end to interface the seal with the internal component. The shroud includes a nut pocket has a cap anti-rotation feature. The nut cap assembly includes a nut received in the nut pocket. The nut includes a threaded bore configured to threadably receive a threaded fastener used to secure the internal component to the external component. The nut includes a nut anti-rotation feature interfacing with the cap anti-rotation feature.

Abstract: Embodiments for commercial freighter configuration for aircraft with composite wings. One embodiment is cargo floor structure for a wing center section of an aircraft. The cargo floor structure includes over wing floor beams extending longitudinally between a rear spar and a front spar of the aircraft. The over wing floor beams are coupled with an upper skin panel of a composite wing. The cargo floor structure also includes intercostals extending spanwise across the over wing floor beams. The intercostals suspended over the upper skin panel of the composite wing. The cargo floor structure also includes a truss box structure disposed between a middle pair of the over wing floor beams and configured to shear a spanwise load from the intercostals into the upper skin panel of the composite wing.