: The aircraft includes an Electronic Instrument System, dual Flight Management System, and a Central Fault Display System for easier maintenance.
: Boeing decided not to offer aft airstairs (rear boarding stairs) on the 717 to maximize fuel efficiency by reducing auxiliary equipment weight. Other Potential Interpretations : The aircraft includes an Electronic Instrument System,
: It maintains a unique 2+3 seating arrangement in economy class, which means only one middle seat per row, unlike the 3+3 layout typical of the Boeing 737 or Airbus A320 families. If you are referring to a different "717"
If you are referring to a different "717" project, here are two other notable possibilities: dual Flight Management System
The Boeing 717 is a twin-engine, single-aisle jet engine aircraft developed for the 100-seat market. It was originally designed by McDonnell Douglas as the MD-95 before the company merged with Boeing.
: In conjunction with Parker Hannifin, the flight deck incorporates a mechanical control suite that replaced much of the cumbersome rigging found in older DC-9/MD-80 aircraft.