Certification flight testing continued through the summer and autumn of 2011 with fixes for problems with adverse yaw, lateral stability, ineffective rudder trim at low power settings, pitch damping, roll/yaw damping, high rotation forces on takeoff and the stall prevention system. The aircraft had still not conducted water trials. Of the certification process the Flight Analyst Designated Airworthiness Representative, John Taylor, said "It should be recognized that the Seawind has a very unconventional configuration and as a consequence, has at times been a very challenging configuration to make compliant with FAR Part 23 certification requirements."