Aircraft wing unit with pressure fence

A method for producing an aircraft structural assembly using a fuselage portion partially defining a pressure vessel and an assembled wing unit wherein the assembled wing unit comprises:

• a first wing extending in a first lateral direction relative to the fuselage portion and a second wing extending in an opposite second lateral direction relative to the fuselage portion;
• a first pressure fence attached to the first wing;
• and a second pressure fence attached to the second wing, the method comprising:
• assembling the assembled wing unit with the fuselage portion so that the first pressure fence defines a first part of the pressure vessel partially defined by the fuselage portion and the second pressure fence defines a second part of the pressure vessel partially defined by the fuselage portion,
• wherein:
• the fuselage portion comprises a fuselage skin supported by a fuselage frame;
• the first pressure fence comprises a first fence skin and the second pressure fence comprises a second fence skin;
• the second fence skin extends upwardly relative to an upper wing skin of the second wing and also in the second lateral direction
• the assembling the assembled wing unit with the fuselage portion includes:
• abutting a first surface of an upper portion of the first fence skin with a portion of a surface of the fuselage skin forming a first contact area;
• abutting a portion of a second surface of the upper portion of the first fence skin with a portion of a surface of the fuselage frame of the fuselage portion forming a second contact area, the second contact area being at an angle from the first contact area;
• and
• using the upper portion of the first fence skin extending upwardly to guide the fuselage frame for self-alignment in the first or second lateral direction between the fuselage portion and the first pressure fence.