Despite not being approved for further development, PZL decided to independently continue refining their designs for a multi-engined night bomber. These studies, led by aircraft engineer Wladyslaw Zalewski, developed an advanced concept, known as the "PZL 3", for an all-metal low-wing cantilever monoplane bomber, which was intended to be powered by an arrangement of four Bristol Jupiter radial engines positioned in tandem pairs and armed with a pair of side-mounted gun turrets in addition to an internally-stowed bombload of 3,000 kg (6,613 lb). However, during December 1930, all work on this concept was abandoned as an economy measure and the construction of a prototype was abandoned. Reportedly, technical data for the PZL 3 was later received by French manufacturer Potez.