Just days before NBAA, the business aviation community lost 95-year-old legend Al Ueltschi. Sonia’s tribute ran in Blue Sky Business Aviation News. You can also read it here. The entire industry mourned the passing of legendary FlightSafety founder A.L. Ueltschi. A commemorative book gave guests to the FlightSafety NBAA booth a way to leave a handwritten note to the family of A.L. Ueltschi, while an email address allows anyone to share their thoughts.