The aircraft, in its definitive form (as the "Leone" I) was a two-engine medium bomber, with a single tail, retractable undercarriage, and metallic structure. It had duralumin structure, a skin of light alloy, and a crew of four or five. The contours of the slim fuselage were designed for aerodynamic benefit. As with the Z.1007, the two pilots were in tandem, not side-by-side. Only the first pilot had a complete set of controls, while the copilot had limited visibility and only a few instruments.