CENTRAL MAINTENANCE COMPUTER
E-Jets have a central brain called the CMC - the central maintenance computer.
All major E-Jet systems have an interface with the CMC that collects fault reports, stores maintenance messages and assists troubleshooting. The information can be accessed from the cockpit and from four LAN ports on the aircraft via a laptop computer for fast downloading and analysis.
E-Jets incorporate fly-by-wire technology that helps to reduce pilot workload, improves aircraft performance, simplifies systems architecture and minimizes weight and maintenance.
Fly-by-wire replaces manual operation of traditional heavy mechanical & hydro-mechanical flight controls and their associated networks of cables, cranks and pulleys, with an electronic interface. Pilot commands are converted to electronic signals which are processed by an on-board computer that regulates the movements of actuators at each control surface.
Automatic structural load protection, compensation for engine thrust asymmetry and configuration changes, and highly reliable primary flight in the pitch, roll and yaw axes work in concert to provide flight crews with aircraft that are uncomplicated to handle yet exceptionally responsive to pilot commands.
E-Jets incorporate a human-centered design approach emphasizing physical and cognitive requirements and abilities. The ergonomic placement of instruments and controls in a dark and quiet environment creates unsurpassed situational awareness that reduces pilot workload.
The Honeywell Primus Epic digital avionics suite has five large-format, 8 x 10-inch, active matrix liquid crystal displays. The "smart" flat panels present information in a clean, simplified arrangement.
There is a cursor control device on the console, similar to what you would find on a laptop computer, to simplify data input and movement between screens.
PRIMARY FLIGHT DISPLAYS (PFD) are used to show:
Attitude Direction Indicator (ADI)
airspeed and altitude indications
Horizon Situation Indicator (HSI)
flight modes (flight director & auto-throttle)
NAV and/or COM radio frequencies
MULTI-FUNCTION DISPLAYS (MFD) have these features:
map or plan navigation format & various synoptic formats
menu softkey that selects a format and controls various systems
TCAS and weather radar functions
maintenance & systems configuration data
redundancy to display both PFD and EICAS formats
ENGINE INDICATON & CREW ALERTING SYSTEM (EICAS) is used to monitor:
engine & APU information
cabin pressurization information
flap/speed brake settings
Airlines can choose to configure their E-Jet flight decks with heads up displays (HUD). E-Jets were the first commercial aircraft to have dual HUD. The HUD feature displays critical flight information on a transparent glass panel positioned between the pilot and windshield. In landing situations with restricted approach visibility, HUD provides an extra margin of safety by allowing pilots to keep their eyes on the runway rather than continuously looking down at instrument panels.
KEEPING YOU AHEAD
Reliability is the cornerstone of scheduled airline operations. That's why Embraer developed AHeAD-PRO, an innovative aircraft health, analysis and diagnostic system available on every E-Jet.
AHeAd-PRO is a computational, web-based platform that allows airlines to continuously monitor the performance of an E-Jet while in flight. It regularly transmits fault identification data for analysis by ground personnel so they can plan maintenance remedies at a downline station.
In-flight fault messages are received from the EICAS and central maintenance computer and transmitted via the ACARS network. Using links to Embraer's digital technical publications, errors are identified, correlated, and logged.
AHeAd-PRO allows airline maintenance teams to continually monitor each E-Jet's operating history in the fleet to minimize ground time and maximize air time.