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Maintenance Diagnostic Computer Switch
Figure 3-10
P604_03_008
7.5
POWER MUST BE OFF BEFORE OPENING PANEL CBP-1
R
S
T
TEST
NORM
OFF
MAINT ADSHC
MFD 1
MFD 2
FIRE
EXT 2
R ENG R ENG
R ENG
FIRE
EXT 1
APU
FIRE
EXT
PWR
SENSE
FEED
L ENG L ENG
L ENG R ENG L ENG
28 VDC EMERGENCY BUS
28 VDC EMERGENCY BUS
APU
FUEL SOV HYD SOV
1
1
1
2
2
2
3
3
3
4
4
4
5
5
5
6
6
6
7
7
7
3 3 3 3 20
3
3
7.5 7.5 7.5 7.5
CIRCUIT BREAKER PANEL CBP - 1
(LOWER)
MFD Guarded Switch
AURAL/VISUAL WARNING
For Training Purposes Only
May 03
3-21
P I LOT T R A I N I N G GU I D E
Flight Data Recorder
Description
The flight data recorder (FDR) records aircraft flight parameters. The FDR system
includes a digital FDR, an underwater locator device (ULD) and a triaxial
accelerometer. (See also Chapter 6 Communications)
Components and Operation
The FDR is located in the aft equipment bay and 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.
FDR EVENT Switch
The FDR EVENT switch is located on the PASS SIGNS and EMER LTS panel. When
the FDR EVENT switch 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 the secondary EICAS page.
FDR EVENT Switch
Figure 3-11
PASS SIGNS EMER LTS
NO SMKG SEAT BELTS
ON
OFF
ARM
FDR
EVENT
ON
OFF
AUTO
ON
OFF
AUTO
O
A A
P604_03_010
AURAL/VISUAL WARNING
3-22 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
EICAS Messages
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, (3)* AURAL INOP DCU 1, 2, (3) * aural warning card fault/fault detection, or DCU 1, 2, (3)* AUDIO
WARNING DISABLE switch/light input open.
DCU 1, 2, (3)* INOP DCU 1, 2, (3) * fault detected.
FDR FAIL Indicates flight data recorder failure.
* = if installed
EICAS Messages
Table 3-4

　
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