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MFD REV and PFD REV positions on each selector are used in the event of a display failure. To
better understand the functions of these positions, the selector should be thought of as a
pointer, pointing to the functioning display.
For example, should the onside PFD fail, the selector would be moved to the MFD REV
position, pointing to the functional display. Likewise, should the onside MFD fail, the selector
would be moved to the PFD REV position, again pointing to the functional display.
What will be shown on the display following a reversionary selection is dependant on where the
EICAS page is being presented. If the EICAS is being shown on the onside MFD, moving the
DISPLAYS selector to the MFD REV position will cause the display to revert to the compressed
configuration, showing PFD and EICAS data on the same display. If the MFD REV position is
selected for the display not showing EICAS, the MFD display will not be affected.
Similarly, if the PFD REV is selected when EICAS is shown on the onside MFD, the PFD will
show a compressed configuration. If the PFD REV position is selected when the EICAS is
shown on the opposite MFD, the PFD display will not be affected.
AURAL/VISUAL WARNING SYSTEM
Description
Vol. 2 03−10−29
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
ENGINE INDICATION AND CREW ALERTING SYSTEM (CONT'D)
Displays Selector − PFD REV Selected
Figure 03−10−26
Displays Selector − MFD REV Selected
Figure 03−10−27
Maintenance Diagnostic Computer
The maintenance diagnostic computer (MDC) is used to record avionics and system diagnostic
data. The computer also records exceedances for several engine parameters, including N1, N2,
ITT, oil temperature, oil pressure and engine vibration.
AURAL/VISUAL WARNING SYSTEM
Description
Vol. 2 03−10−30
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
ENGINE INDICATION AND CREW ALERTING SYSTEM (CONT'D)
The MDC continuously records fault and engine trend monitoring data. This data may be viewed
by maintenance personnel on one of the multifunction displays. It may also be downloaded to a
maintenance facility computer for analysis.
An exceedance event occurs when a parameter exceeds a specified threshold level. Maintenance
personnel can retrieve the information for use in engine trend analysis, significant event recording,
and for avionics/aircraft system failure detection.
The MDC page menu is available on the flight deck by selection of a red guarded switch on circuit
breaker panel number one (CBP 1). Data can be displayed on MFD 1 or MFD 2, as determined by
switch selection. Instructions on MDC data presentation are displayed on the selected MFD.
Maintenance Diagnostic Computer Switch
Figure 03−10−28
Flight Data Recorder
The flight data recorder (FDR), located in the aft equipment bay, records aircraft flight parameters.
The FDR system includes a digital FDR, an underwater locator device (ULD) and a triaxial
accelerometer (see Chapter 8, Emergency Equipment).
The FDR records the last 25 hours of flight data in a solid-state memory. The FDR is specially
constructed to survive the shock of an aircraft crash. It is automatically turned on when the right
engine start switch is pushed.
When the FDR EVENT switch, located on the PASS SIGNS and EMER LTS panel, is pushed, the
DCUs place a marker into the FDR memory for quick data retrieval of the recorded event. A green
advisory message FDR EVENT is then displayed on EICAS.
AURAL/VISUAL WARNING SYSTEM
Description
Vol. 2 03−10−31
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
ENGINE INDICATION AND CREW ALERTING SYSTEM (CONT'D)
FDR EVENT Switch
Figure 03−10−29
EICAS MESSAGES
The table that follows shows the EICAS messages related to this chapter:
MESSAGE MEANING
EICAS COMP INOP EICAS comparator inoperative (N1, N2 or ITT data comparison not
active).
FDR EVENT FDR EVENT marker switch pushed and FDR installed.
CAS MISCOMP Valid XTALK labels from another DCU are available, and a miscompare
for any warning, caution, or aural messages exists for more than 20
seconds.
DCU 1 (2) AURAL INOP DCU 1 (2) aural warning card fault/fault detection, or DCU 1 (2) AUDIO
WARNING DISABLE switch/light input open.
DCU 1 (2) INOP DCU 1 (2) fault detected.
FDR FAIL Indicates flight data recorder failure.
AURAL/VISUAL WARNING SYSTEM
Description
Vol. 2 03−10−32
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
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