Aerofoil structure

A method for use in assembling an aerofoil structure, the method comprising:

• providing a torsion box comprising a first mounting feature and a second mounting feature;
• providing a fixed leading or trailing edge structure having a third mounting feature and a fourth mounting feature, wherein the first mounting feature and the third mounting feature each have a fastener hole prior to aligning the leading or trailing edge structure to the torsion box, and wherein the second mounting feature and the fourth mounting feature are without fastener holes for joining the torsion box to the fixed leading or trailing edge structure prior to aligning the leading or trailing edge structure to the torsion box;
• aligning the fixed leading or trailing edge structure to the torsion box so as to align the fastener holes of the first mounting feature and the third mounting feature;
• drilling through the second mounting feature and the fourth mounting feature to form fastener holes in the second mounting feature and the fourth mounting feature when the fixed leading or trailing edge structure is aligned with the torsion box;
• installing a fastener through the fastener holes of the first mounting feature and the third mounting feature, and installing a fastener through the fastener holes of the second mounting feature and the fourth mounting feature, so as to join the fixed leading or trailing edge structure to the torsion box.