Question: Who produced a utility aircraft that is a remanufactured and modified Douglas DC-3, conversions include fitting the frame with the new engine produced by Pratt & Whitney Canada? 
Sentence (from "Pratt &amp; Whitney Canada PT6"): The Pratt & Whitney Canada PT6, produced by Pratt & Whitney Canada, is one of the most popular turboprop aircraft engines in history.
Relevant evidence: Yes