(modified) - a further continuation of the modifications of the Yak-12. Based on operational experience , the tail section of the fuselage was lengthened and the total length of the aircraft increased to 9 m . The tail is enlarged, a fork is added. The fuselage, front wing struts and landing gear struts are reinforced. The rubber shock absorption of the tail wheel has been replaced by a hydraulic one, the coulter has been removed. There are three passengers. The weight of the empty aircraft increased to 1026 kg, the normal flight weight became 1450 kg. The aircraft is adapted to install agricultural equipment on it for 2 hours. In the sanitary version, in addition to the patient, there was also a medical worker accompanying him. In the variant for dropping parachutists, a footboard was arranged on the right side.