• Unsurpassed flexibility and crew coordination with centralized, fully integrated system
• Terminal and en route ADI display modes eliminate unnecessary information
• Airspeed and trend displays
• Integrated system architecture offers extensive reversionary capabilities
• Improved integrated system diagnostic capability minimizes the need for line test equipment
• Full-sky ADI and three-dimensional runway provide more realistic view of outside world
• Multiple-mode EHSI provides dual course arrows, waypoints, weather radar and sensor source selection on a single display
• MFD provides a shared data information window without disrupting ADI/HSI display modes
• Two-, three-, four- and five-tube configurations available
• 4 x 4-inch display saves console space
• Compatible with FCS-65 or FCS-80 and AHC-85
• Compatible with EGPWS for bolt-on applications that utilize global positioning systems and on-board global terrain databases to provide pilots with a picture of the terrain in front of them

The EFIS-84 Electronic Flight Instrument System combines Electronic Attitude Director Indicator/Electronic Horizontal Situation Indicators (EADI/EHSI) with a center panel Multifunction Display (MFD) to provide a fully integrated flight deck display system. The electronic ADI expands the horizons of a conventional four-inch electromechanical instruments with a 50 percent larger earth/sky representation for terminal and en route formats. The electronic HSI combines multiple display formats with weather radar and built-in NAV source selection for simplified coordination of all navigation and weather avoidance tasks. The MFD augments the EADI/EHSI displays by providing the pilot and copilot with additional navigation, weather avoidance, data management and reversionary functions.

The EFIS-84 system is comprised of a family of components that can be configured to meet various flight deck display applications. The system components are:

The EFIS-84 can be configured in two-, three-, four- or five-tube systems depending on the flight deck application. (See tables for system totals and equipment complement.)

The EFD-84 and MFD-85B contain a CRT, deflection yoke, video and deflection amplifiers and high-voltage power supply. The CRT is a high-resolution color tube. The CRT has an in-line gun with shadow mask that uses a black matrix surrounding pigmented phosphor dot trios; this provides high contrast along with high resolution. A custom designed, multiband pass optical filter is used to provide enhanced contrast. Both stroke and raster scanning techniques are used to provide large area color background for weather and distinct alphanumerics and symbols with high brightness. Mode select and display control functions are located on the display bezel for the MFD-85B.

• Pitch and roll attitude
• Steering commands (single or dual queue)
• Vertical deviation (glidescope)
• Localizer deviation
• Autopilot mode annunciation (analog, digital)
• Radio altitude
• Decision height
• Marker beacon annunciation
• Fast-slow deviation
• Indicated airspeed
• Trend vector
• VNAV
• Cat II comparator logic
• Rising runway
• Microwave landing system

• True/magnetic heading
• Selected heading
• Selected course
• Navigation data source annunciation lateral deviation
• To/from
• Distance to station waypoint
• Ground speed, time-to-go, elapsed time
• Bearing pointer (VHF omnidirectional radio range, automatic direction finder, etc.)
• Vertical deviation (vertical navigation or global positioning system)
• Weather radar return information (four-color, path athenuation compensation alert)
• Cat II comparator
• Wind vector
• Map of sector mode

The EFIS-84 system provides system operational capability in the event of a system element failure. The following paragraphs describe this capability with reference to any operational differences that may be required.