Covington Aircraft Engines, located at Okmulgee Regional Airport, near Tulsa, Okla., is known for its work overhauling Pratt & Whitney R-985, R-1340 and PT6 engines. This past week, though, the MRO gave back to the engine manufacturer by presenting Pratt & Whitney Canada president John Saabas and his executives with a handmade table in celebration of the 50th anniversary of the venerable PT6 turbine powerplant.