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Maintenance Diagnostic Computer Switch
Figure 03−10−10
AURAL/VISUAL WARNING SYSTEM
Description
Vol. 2 03−10−17
REV 75, Feb 17/09
CL−604 Operating Manual
PSP 604−6
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 03−10−11
AURAL/VISUAL WARNING SYSTEM
Description
Vol. 2 03−10−18
REV 75, Feb 17/09
CL−604 Operating Manual
PSP 604−6
HARD LANDING INDICATION SYSTEM
Description
The hard landing indication system (HLIS) records and displays hard landing information. The
HLIS will be consulted following a report of a hard landing event. The numeric display indicates the
maximum “Delta G” for the landing event.
Operation
During normal operation the four digit display is dark. Pressing and holding the VIEW LOG button
for 2 seconds will display the results from the last landing. The displayed value is then used in
conjunction with the landing weight to determine the level of inspection prescribed in the Airplane
Maintenance Manual. The HLIS can display the last 9 landings by subsequent quick pushes of the
button. A FAIL light will come on if a fault exists in the HLIS.
Hard Landing Indication System Panel
Figure 03−10−12
AURAL/VISUAL WARNING SYSTEM
Description
Vol. 2 03−10−19
REV 76, Jul 17/09
CL−604 Operating Manual
PSP 604−6
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
AURAL/VISUAL WARNING SYSTEM
Description
Vol. 2 03−10−20
REV 75, Feb 17/09
CL−604 Operating Manual
PSP 604−6
POWER SUPPLY AND CIRCUIT BREAKER SUMMARY
SYSTEM SUB-SYSTEM CB NAME BUS BAR
CB
PANEL
CB
LOCATION
NOTES
EICAS Displays
Primary Display
EICAS PRIM DISPL DC BATT 2 Q4
EICAS PRIM DISPL DC BUS 1 1 H4
Secondary Display
EICAS SEC DISPL DC BATT 2 Q5
EICAS SEC DISPL DC BUS 1 1 H5
EICAS Control Panel EICAS CONT PNL DC BATT 2 Q2
Lamp Driver Units
EICAS L LDU DC BUS 1 1 H3
EICAS R LDU
DC BATT 2
Q3
Bright/Dim Power
Supplies
EICAS BRT/DIM
PWR SUPP 1,2,3
Q6–7–8
DC BUS 1 1 H6–7–8
Data Concentrator
Units
DCU 1
EICAS DCU 1
(CH−A, CH−B)
DC ESS 4 C12–13
DC BATT 2 Q9–10
DCU 2
EICAS DCU 2
(CH−A, CH−B)
Q11–12
DCU 2/3
DC MAIN
BATT
DIRECT
5 A5
DCU 3
DCU 2/3
DC MAIN
BATT
DIRECT
5 A5
EICAS DCU 3
(CH−A, CH−B)
DC BUS 2 2 L9−10
POST SB
604−31−001
Flight Data
Recorder
FDR
FDR CONT DC BATT 1 Q3 5301−5303,
5306 &
POST SB
604−31−002 or
604−31−005
FDR PWR AC ESS 3 C3
Hard Landing
Indication
HLIS HARD LDG IND DC BUS 1 1 G5
POST SB
604−32−024
AURAL/VISUAL WARNING SYSTEM
Summary
Vol. 2 03−20−1
REV 75, Feb 17/09
CL−604 Operating Manual
PSP 604−6
AURAL/VISUAL WARNING SYSTEM
Summary
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