As a holder of a variety of STCs, and a provider of propellers to other STC holders, McCauley can play an important role in updating and adding value to your aircraft. We serve as consultant, designer, and manufacturer, developing the new propellers based on our knowledge and expertise. Our BLACKMAC propeller series has redefined STC conversions by tailoring propellers for specific applications. The result: performance so impressive that many OEM customers are adopting our STC designs for their original equipment propellers. McCauley BLACKMAC STC conversions are available through our extensive international dealer network.