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erasure of the data. <1065>
The FDR and CVR each includes an underwater locater device (ULD). The ULD is a battery
operated, underwater, pulsed acoustic beacon which has an internal switch that is activated
by water. When activated, the unit sends out a 36.5 to 38.5 kilohertz signal.
A quick access recorder (QAR), located in the underfloor avionics bay, operates under the
same conditions as the FDR. The QAR receives flight data from the data concentrator unit
(DCU) that is not supplying data to the FDR. The data is stored in files on a removable disk.
<1204>
AURAL/VISUAL INDICATING AND Vol. 1 02--30--2
RECORDING
Recording REV 1, Jan 13/03
Flight Crew Operating Manual
CSP C--013--067
Recording
Figure 02---30---1
Engine / Miscellaneous Test Panel
Center Pedestal
Cockpit Voice Recorder Control Panel
Pilot’s Instrument Panel
ERASE
Used to erase
previous recording,
while on ground.
FDR EVENT
Pushing and holding for
a period of 2 seconds
records a time stamp on
the FDR.
HEADSET
Used to connect
headset to monitor
recording tone
during test.
AURAL/VISUAL INDICATING AND Vol. 1 02--30--3
RECORDING
Recording REV 1, Jan 13/03
Flight Crew Operating Manual
CSP C--013--067
Recording --- EICAS Indications
Figure 02---30---2
FDR FAIL status (white)
Indicates a difference
between the recorded data
and the data supplied by
the DCU.
FDR ACCEL FAIL status (white)
Indicates a FDR accelerometer
failure.
FDR EVENT advisory (green)
Indicates that a FDR EVENT
was selected.
Status Page
AURAL/VISUAL INDICATING AND Vol. 1 02--30--4
RECORDING
Recording REV 1, Jan 13/03
Flight Crew Operating Manual
CSP C--013--067
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Flight Data
FLIGHT REC
PWR AC BUS 1
1
C9
Recorder FLIGHT REC
CONT DC BUS 1
E14
Recording Cockpit Voice
Recorder
CKPT VOICE
REC
DC
ESSENTIAL V7
Quick Access
Recorder
<1204>
QAR AC BUS 2
2
C13
AURAL/VISUAL INDICATING AND Vol. 1 02--40--1
RECORDING
Maintenance Data Computer REV 1, Jan 13/03
Flight Crew Operating Manual
CSP C--013--067
1. MAINTENANCE DIAGNOSTIC SYSTEM
The maintenance diagnostic system is used by maintenance personnel to view current and
historical information relating to specific aircraft systems health and operation.
The system uses a maintenance diagnostic computer (MDC) to process and record avionics
and aircraft systems data for future retrieval. A maintenance switch, located behind the
pilot’s seat, is used to enter the maintenance diagnostics mode. The multifunctional displays
(MFD) are used to display the maintenance data and the EICAS control panel is used to
control and select information on the MFD display. A data loader unit is used to upload or
download data to or from a floppy disk.
When the maintenance switch is set to MFD1 or MFD2, the applicable MFD is configured to
display maintenance related display pages and the EICAS control panel is configured as a
maintenance page control panel.
AURAL/VISUAL INDICATING AND Vol. 1 02--40--2
RECORDING
Maintenance Data Computer REV 1, Jan 13/03
Flight Crew Operating Manual
CSP C--013--067
Maintenance Data Computer --- Controls
Figure 02---40---1
MAINT (Guarded)
Used to select the
appropriate MFD
for maintenance
diagnostics.
Maintenance Switch
Behind Pilot’s Seat
EICAS Control Panel
Center Pedestal
SEL
Used to select an item.
UP and DOWN
Used to move cursor.
MENU
Used to display
main menu.
DOORS
Used to return to
previous menu.
F/CTL
Used to abort
test or rigging.
HYD
Used to delete service
or fault message.
AURAL/VISUAL INDICATING AND Vol. 1 02--40--3
RECORDING
Maintenance Data Computer REV 1, Jan 13/03
Flight Crew Operating Manual
CSP C--013--067
A. Maintenance Main Menu Overview
S Current Faults -- Displays fault(s) currently detected by the MDC and failure
messages reported by the DCU.
S Current Service Messages -- Displays maintenance messages received from the
DCU.
S Aircraft History -- Provides access to history displays for faults, service messages,
engine excellence and engine trends. Also used to access life cycle data and flight
leg summary.
S LRU Testing -- Used to initiate an line replaceable unit (LRU) test and display test
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