Delivered new from Sikorsky to the French Armee de l'Air in 1956, this S-58 was purchased surplus by Sikorsky in the early 1970s and converted to a Pratt & Whitney Canada PT6T twin turbine S-58ET registered N1144U. It flew with Heli-Swiss between April 1972 and July 1983 (including on lease to Heli Union and Heliservice). It was imported to the US by Air Associates as N39790 and sold to Aris Helicopter's as N58AH still wearing the Heli-Swiss colour scheme in July 1984. It was registered to B&B Helos Llc in April 2009, but operates as Aris Helicopters, a Division of Heli Flite, Inc.