 During the 1970s, SOCATA had sold a license for production of the Rallye 100ST model to the Polish State aviation company PZL, which led to the aircraft being independently constructed in its facilities in Warsaw as the "PZL Koliber" ("Humming Bird").On 18 April 1978, the first PZL-built aircraft performed its maiden flight.During 1979, quantity production of the Koliber commenced; an initial batch of ten aircraft was produced that year.