 The CH-53K will keep approximately the same footprint as the CH-53E.The CH-53K can carry two 463L master pallets, eliminating the need to break apart pallets between airlifter and helicopter.Major subcontractors include Aurora Flight Sciences (main rotor pylon), Exelis Aerostructures (tail rotor pylon and sponsons), GKN Aerospace (aft transition), Onboard Systems International (external cargo hook system), Rockwell Collins (avionics management system), Sanmina-SCI Corporation (Intercommunications System), and Spirit AeroSystems (cockpit and cabin).