in conjunction with parker hannifin, mpc products of skokie, illinois designed a fly-by-wire technology mechanical control suite for the 717 flight deck. the modules replaced much cumbersome rigging that had occurred in previous dc-9/md-80 aircraft. the rolls-royce br715 engines are completely controlled by an electronic engine system (fadec – full authority digital engine control) developed by bae systems, offering improved controllability and optimization. the engine has significantly lower fuel consumption compared to other engines of the equivalent amount of thrust.