Aeronáutica Agrícola Mexicana SA (AAMSA) was formed in 1971 as a joint venture between Rockwell International (30%) and Industrias Unidas SA (70%) to manufacture Rockwell's range of agricultural aircraft at a factory in Pasteje .

The company’s most noteworthy product was the A9B-M Quail, a development of the CallAir A-9, which was produced until 1984.