Fitting with torsion box, of plastic material reinforced with carbon fibre, for coupling a drive motor / spindle unit for trimming of a horizontal stabiliser of an aircraft

Fitting with torsion box for coupling a motor/spindle unit for trimming of a horizontal stabilizer of an aircraft, which comprises

• a duplicated primary fastening for the pivoting coupling of a motor/spindle unit, and a secondary fastening;
• wherein
• the torsion box comprises a first side wall and first means of attachment for attaching the first side wall to a first frame of the tail fuselage of the aircraft, and a second side wall and second means of attachment for attaching the second side wall to a second frame of the tail fuselage;
• the side walls of the torsion box are attached together by a stiffening element arranged between those side walls;
• the stiffening element comprises a first end part attached to the first side wall, a second end part attached to the second side wall and a central part which joins those end parts;
• each end part comprises individual first sections, which are extended in parallel to the side walls to both sides of said central part, individual second sections which are respectively extended from one of the first sections towards the corresponding side wall, and individual third sections each one backing onto and attached to the side wall;
• the first sections of the first end part of the stiffening element and the first sections of the second end part of the stiffening element include individual first primary passage holes and the side walls of the torsion box comprise individual second primary passage holes, said primary passage holes being aligned in order to shape the primary fastening;
• the secondary fastening is at least one secondary passage hole in the central wall of the stiffening element;
• the torsion box and the stiffening element are shaped from plastic material reinforced with carbon fiber.