BlackHawk, a supplier of Pratt and Witney aircraft engines, has introduced a replacement scheme on Cessna Caravans in Kenya working with Phoenix Aviation, the approved distributor. Ms Cisca de Lange, the BlackHawk regional sales director, Sati Reel the managing director of Phoenix Aviation and Ben Estherhuizen, an engine expert, inspect one of the clean burning exhaust stacks on a new Pratt and Witney engine.