 The order for the pre @-@ production I @-@ 250s had been placed with Factory No. 381 in Moscow for two aircraft to be delivered in September , three more in October and the remainder by the end of the year . This proved to be very optimistic and it was revised to a single aircraft by the end of the year . The airframe was completed on this revised schedule , but its engine was not ready in time . The factory management was much criticized for these problems which were not entirely under their control as changes to the design and drawings were constant . The criticism was not limited to just the I @-@ 250 program as the other jet programs could not be developed as fast as the leadership wanted as well and Alexei Shakhurin , the head of MAP ( Ministry of Aviation Industry ) and its NKAP predecessor since 1940 , was arrested in March 1946 as a sign of their displeasure . The new Minister severely reprimanded the designer of the VRDK and three factory directors on 13 April 1946 and set up a commission to determine why Factory No. 381 and TsIAM had failed to meet their deadlines . He refused to accept its findings as it apportioned blame fairly evenly among those responsible for the production program and he had the director of Factory No. 381 and his quality control manager arrested for industrial sabotage . 
