Operation Manual Part 2

Aerosoft – Digital Aviation

CRJ-70 & CRJ-900

AOM PART 2

Systems Description

VOL

5-1-6

26-Jul-2017

AURAL/VISUAL INDICATING & RECORDING

All aircraft systems do have sensors to detect

abnormal settings or behaviour. All systems –

including the engines – report this information to

two central processing units: the data

concentrator units (1 & 2). The interface to the

pilots is the engine indication and crew alerting

system (EICAS). Certain messages do also trigger

audio signals or trigger the master warning or

master caution light.

The EICAS is comprised of two units – called

EICAS Display 1 & 2 (ED1 and ED2) – basically the

left and the right EICAS display: The left EICAS is called ED1 and the right EICAS ED2.

Normally ED1 displays the primary page and ED2 displays the status page. The EICAS control panel on the

lower pedestal enables the pilots to select if the primary, the secondary or a synoptic page is displayed on

either ED. Please us the display reversion control panels to change whether the primary or secondary is

displayed on ED1 or ED2 respectively. The EICAS source selector panel allows the pilot to select where all EICAS

information is displayed. You may choose between ED1 or ED2 or both (default).

The EICAS primary page displays the following information:

1. Engine compressor and turbine speeds (N

and N

rpm)

2. Engine temperature (ITT)

3. Fuel flow (FF)

Oil pressure and temperature

Engine vibration data

4. Landing gear position

5. Slat/flap position

6. Fuel tank quantities and total fuel

7. Crew alerting system (CAS) messages in the form

of red warning and amber caution messages