 Aircraft with this engine were designated HA-1109-K1L (65 being produced).In 1954 Hispano Aviación re-engineered the airframe to accept the Rolls-Royce Merlin 500-45 and produced the HA-1112-M1L.Production of the Hispano Aviación HA-1109 and HA-1112 "Buchon"s ended in 1958; however, Spain continued to use the HA-1112 operationally until late 1967.