Abstract: An auxiliary power unit enclosure of an aircraft includes a space frame configured to carry a load and defining an auxiliary power unit compartment. The space frame includes a plurality of frame elements coupled together at a plurality of nodes. The auxiliary power unit enclosure also includes a fairing coupled to and surrounding the space frame.

Abstract: A method and system for attaching a vertical stabilizer to an aircraft fuselage using a clevis system is disclosed. A composite skin is installed over the aircraft fuselage. The composite skin has apertures for receiving a plurality of clevises in a clevis system. The plurality of clevises is inserted through the apertures in the composite skin. Each of the plurality of clevises is secured to a frame member in the aircraft fuselage. The vertical stabilizer has a multi-spar box connected with a base rib assembly having a plurality of lugs. The base rib assembly of the vertical stabilizer is engaged with the clevis system. The plurality of lugs in the base rib assembly is secured to the plurality of clevises in the clevis system. Attachment of the vertical stabilizer to the aircraft fuselage, as well as subsequent inspection, may be performed from outside the aircraft.

Abstract: A method and system for attaching a vertical stabilizer to an aircraft fuselage using a clevis system is disclosed. A composite skin is installed over the aircraft fuselage. The composite skin has apertures for receiving a plurality of clevises in a clevis system. The plurality of clevises is inserted through the apertures in the composite skin. Each of the plurality of clevises is secured to a frame member in the aircraft fuselage. The vertical stabilizer has a multi-spar box connected with a base rib assembly having a plurality of lugs. The base rib assembly of the vertical stabilizer is engaged with the clevis system. The plurality of lugs in the base rib assembly is secured to the plurality of clevises in the clevis system. Attachment of the vertical stabilizer to the aircraft fuselage, as well as subsequent inspection, may be performed from outside the aircraft.

Abstract: The illustrative embodiments disclose a pressure bulkhead system comprising an aft pressure bulkhead, skin splice angles, and stringer splice angles. The aft pressure bulkhead has an outer compression ring. The skin splice angles are positioned adjacent to one another and joined to the outer compression ring. The skin splice angles form a joint between a first section of a fuselage, a second section of the fuselage, and the aft pressure bulkhead. The stringer splice angles join the skin splice angles to a stringer in the second section of the fuselage.

Abstract: An auxiliary power unit enclosure of an aircraft includes a space frame configured to carry a load and defining an auxiliary power unit compartment. The space frame includes a plurality of frame elements coupled together at a plurality of nodes. The auxiliary power unit enclosure also includes a fairing coupled to and surrounding the space frame.

Abstract: The illustrative embodiments disclose a pressure bulkhead system comprising an aft pressure bulkhead, skin splice angles, and stringer splice angles. The aft pressure bulkhead has an outer compression ring. The skin splice angles are positioned adjacent to one another and joined to the outer compression ring. The skin splice angles form a joint between a first section of a fuselage, a second section of the fuselage, and the aft pressure bulkhead. The stringer splice angles join the skin splice angles to a stringer in the second section of the fuselage.