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Electronic Flight Instrument System

🛩️An electronic flight instrument system (EFIS) is an electronic display technology on the flight deck display system.

🛩️It usually consists of Engine Indicating and Crew Alerting System (EICAS), Primary Flight Display (PFD) and Multi-Function Display (MFD) display.

🛩️They commonly use a liquid crystal display (LCD) even though they earlier used cathode ray tube (CRT) displays.

🛩️Installation of the EFIS varies greatly this is where a wide-body aircraft is equipped with six or more display units on which flight and navigation data are displayed while a light aircraft is likely to have one unit.

✈️The installation of EFIS follows the sequence
✈️ Displays
✈️Controls
✈️ Data processors

🛩️Basic EFIS contains all the facilities in one unit....
✈️Display Units-
🛫Primary flight display (PFD)
🛫Navigation display (ND)
🛫Multi-function display (MFD)

🛫Electronic centralized aircraft monitoring (ECAM)/Engine indications and crew alerting system (EICAS)....

✈️Control Panels-
🛫There is the provision of controls to the pilots where they select the display mode and range (for instance, compass rose or maps) and key in data (like a certain heading)....

✈️Data Processor-
🛫The symbol generator also known as display processing computer or display electronics unit, produces the visual display in the EFIS. It receives data inputs from the pilot and the EFIS format selections made, and signals from sensors...

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