Abstract: A truss reinforced radome crown structure shock absorbing and recoiling system that is utilized with an aircraft antenna adapter plate or other satellite communication (SAT-COM) structure to an aircraft airframe or fuselage and for allowing for pressurized expansion and contraction of the fuselage, or to protect against a bird strike incident or rapid decompression event. There are multiple design configurations of the system, with all configurations utilizing an actuating recoiling strut. In first and second design configurations, the strut is used on an adapter plate or adjacent to attachment lugs. A third design configuration uses a strut with a sliding mechanism. In all configurations after decompression, a bird strike incident or rapid decompression event the system will allow a fuselage to return to an original position.

Abstract: The method of making a plurality of door frames from a single slab of metallic sheet material. The largest size door frame is first produced from a slab of material separating such from this slab of material. Then producing a second size of door frame from the remaining section of the slab of material where the second size is of a smaller configuration than the first size. Both door frames are each a single integral unit. There may be produced a third size of door frame from the remaining slab of material and possibly even a fourth size.