Electronic Instrument System - Overview

Overview

EFIS installations vary greatly. A light aircraft might be equipped with one display unit, on which are displayed flight and navigation data. A wide-body aircraft is likely to have six or more display units.

Typical EFIS displays and controls can be seen at this B737 technical information web site. The equivalent electromechanical instruments are also shown here.

An EFIS installation will follow the sequence:

  • Displays
  • Controls
  • Data processors

A basic EFIS might have all these facilities in the one unit.

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