Flight Instruments Flashcards
Describe the organization of the Electronic Instrument System (EIS)
6 identical cathode ray tube display units (DUs) in two parts
-Electronic Flight Instruments system (EFIS)
–Two primary flight displays (PFDs) Normally displayed on the outboard DU
–Two Navigation displays (NDs) Normally displayed on the inboard DU
Electronic Centralized aircraft monitor (ECAM)
–Engine/ Warning Display E/WD normally displayed on the upper ECAM
System Display (SD normally displayed on the lower ECAM
Describe the components of the air data internal reference system (ADIRS)
Three Air Data Inertial Reference Units (ADIRUs) are divided into two units
-Air data reference unit (ADR) unit- processes pitot-static information
-Inertial reference (IR) unit- processes attitude, positional, and wind data
-ADIRU 1 supplies information to the CAs PFD and ND
ADIRU 2 supplies information to the FOs PFD and ND
-ADIRU 3 serves as a backup
Explain the function of the 3 display management computers (DMCs)
The DMCs process signals received from the sensors and computers within the aircraft for display on the DUs
-DMC 1supplies information to the CAs PFD and ND
DMC 2 supplies information to the FOs PFD and ND
-DMC 3 serves as a backup
Describe the general displays of the E/WD
Primary engine operating parameters- N1 N2 EGT and fuel flow
-Supplemental operating information
-thrust limit mode
-FOB
-Slat/Flap position
-Memo section
-Normal and non normal operations including checklists
Class 1 ECAM messages
Explain the color coding convention of E/WD
Green- Normal long term operation
White- Remarks and labeling guidance for procedures
Blue- Units of measure and ECAM action steps
Amber- Failure or configuration needing crew awareness, but not necessarily immediate action
Red- a failure or configuration requiring immediate crew action
Magenta- informational messaging
Amber Xs information not available `
Recall the EFIS display unit priority
The PFD takes priority over the ND
If the out DU is turned off or fails, the PFD automatically transfers to the inner DU
Recall the ECAM Display Unit Priority
The e/wd (upper cam) takes priority over the SD (Lower ECAM)
If the upper ECAM DU is turned off or fails the E/WD automatically transfers to the lower ECAM DU
Recall the functions of the ND brightness control knob
The inner knob is used to control the general brightness of the ND symbols. Rotating the knob all the way counterclockwise turns off the ND
The outer knob controls the brightness of both weather radar displays and EGPWS terrain pages
Recall the types of failure messages
Independent- A failure that affects an isolated system or item without degrading the performance of other system or components.
-Presented in the left column of the E/WD memo section
-Affected system is underlined
-Specific failure follows the affected system
Primary- Failure that affects the use of other systems or components
-presented in the left column of the E/WD memo section as a boxed item
Secondary- system or components affected as a the result of a primary failure
-Presented in the right column of the E/WD memo section in amber
Recall the indications of a display Unit (DU) Failure
A Failed DU will flash, go blank or be distorted
DUs are not monitored any the FWCs so there will be no ECAM messages
Describe the indications of pumps on the systems display
Pumps are presented as a square
-inline geen, green vertical line indicates the pump is on and pump pressure is normal
-Crossline green, green line that is horizontal indicates the pump is off in accordance with automatic logic
-Crossline amber indicates the pump has been manually selected off
-LO Amber indicates the pump is on but pump pressure is low
Describe the indications of valves on the SD
Valves presented as a circle
-Inline green indicates the valve is open
-Crossline green indicates the valve is closed
-Crossline amber indicates the valve is stuck closed
-Inline amber indicates the valve is stuck open
-Diagonal Amber means the valve is in transit
Explain the location and function of the STATUS page
Located on the SD
-Provides an operational summary of the state of the aircraft
Displayed by
-pressing the STS pb on the ECAM control panel
-automatically as part of the ECAM non-normal procedure
-Automatically when CONF 1 (flaps 1) has been selected in the approach phase and the status page is not empty
NOTE STS REMINDER (a white boxed STS) appears at the lower portion of the E/WD whenever information exists on the STATUS page
Describe the functions of the SWITCHING panel
ATT HDG- Selects IRU 3 for attitude and heading information when IRU 1 or 2 fail
AIR DATA- selects ADR 3 for pitot-static information when ADR 1 or 2 fails
EIS DMC- selects DMC 3 when DMC 1 or 2 Fails
ECAM/ND XFR- transfers the SD (lower ECAM) information to the CAs or FOs ND screen
NOTE ND screen information cannot be transferred to the SD
Describe the function of the CLR pb on the ECAM control panel
-Used to clear the failure messages and sequence through the SD pages during an ECAM non normal procedure
-With multiple failure messages displayed, pressing the CLR pb will remove (clear) the first message and all of its associated action steps
