The aircraft's undercarriage was entirely retractable via hydraulic systems, or in an emergency, a backup air system. The doors to the bomb bay were also operated by these systems, an additional safety measure was installed to ensure that the bombs could not be dropped if the doors were shut. The bombs were housed on bomb racks inside the internal bomb bay, and other armaments such as torpedoes could also be fitted. All fuel tankage was located in the wings in order to keep the fuselage free to accommodate more armaments in the bomb bay which covered nearly two-thirds of the underside of the fuselage.