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Vol. 1 10--30--3
FIRE PROTECTION
Lavatory REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Lavatory Waste Compartment Extinguisher
Figure 10---30---3
WASTE COMPARTMENT
FIRE EXTINGUISHER
A
A
LAVATORY
TEMPERATURE
SENSOR
C. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Lavatory Smoke
Detection
LAV SMOKE
DET DC BUS 1 1 D9
Vol. 1 10--30--4
FIRE PROTECTION
Lavatory Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
THIS PAGE IS INTENTIONALLY LEFT BLANK
Vol. 1 10--40--1
FIRE PROTECTION
Main Landing Gear Overheat Detection REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
1. MAIN LANDING GEAR OVERHEAT DETECTION
The main landing gear overheat detection system provides indication of overheat conditions
in the main landing gear wheel wells that can be caused by overheated brakes or brake
fires. The system consists of two overheat detection loops and an overheat detection unit.
The detection loops are installed around the top inner surface of each main wheel bin and
are connected in series to the detection unit.
The overheat detection unit is located under the copilots side console. The unit continuously
monitors the loops for overtemperature conditions and system faults. If an overheat
condition is detected by the unit, in either wheel bin, a signal is sent to display a MLG BAY
OVHT warning message on the EICAS primary page. If a system fault is detected by the
unit, a signal is sent to display a MLG OVHT FAIL caution message on the EICAS primary
page.
The warning of an overheat condition, alerts the pilot to immediately lower the landing gear
to reduce the landing gear temperature. The warning message will persist until the
temperature in the wheel bin returns to normal limits.
The main landing gear overheat detection system may be tested, from the landing gear
control panel, by simulating an overheat condition or a system fault condition. The EICAS
will display the applicable warning or caution message during the test.
Landing Gear Control Panel
Figure 10---40---1
Landing Gear Control Panel
Center Pedestal
MLG BAY OVHT
Used to simulate an
overheat condition in the
main landing gear bay.
MLG BAY OVHT warning
message comes on.
OVHT TEST WARN FAIL
Used to simulate a failure in
the main landing gear bay
overheat detection system.
MLG OVHT FAIL caution
message comes on.
LDG GEAR
UP
DN
DN LCK
REL
ANTI SKID
ARMED
MLG BAY
OVHT
OVHT TEST
WARN FAIL
OFF
BTMS OVHT
WARN RESET
HORN
MUTED
Vol. 1 10--40--2
FIRE PROTECTION
Main Landing Gear Overheat Detection Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
Landing Gear EICAS Messages <1001>
Figure 10---40---2
MLG OVHT FAIL caution (amber)
Indicates that a fault exists in the
main landing gear bay overheat
detection system.
MLG BAY OVHT
MLG OVHT FAIL
GEAR BAY
OVERHEAT
MLG BAY OVHT warning (red)
Indicates that an overheat condition
exists in one or both of the main
landing gear bays.
Primary Page
Vol. 1 10--40--3
FIRE PROTECTION
Main Landing Gear Overheat Detection Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
MLG Overheat Indication and Test
Figure 10---40---3
OVERHEAT
DETECTOR
SHORT
CIRCUIT
DETECTOR
10 ms
DELAY
CB2--N9
28 VDC
BATTERY BUS
MLG BAY OVHT
DETECTION
OVERHEAT DETECTION UNIT
OVHT
MLG BAY
OVHT TEST
PANEL
WARN
FAIL
DCU’S
EICAS DISPLAY
MLG BAY OVHT (RED)
MLG BAY FAIL (AMBER)
GEAR BAY OVERHEAT
RIGHT TEMP
SENSOR
LEFT TEMP
SENSOR
OVERHEAT
TEST
RESISTOR
INHIBIT
Vol. 1 10--40--4
FIRE PROTECTION
Main Landing Gear Overheat Detection Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Main Landing
Gear
Overheat
Detection
MLG BAY
OVHT DET
BATTERY
BUS 2 N9
Vol. 1 11--00--1
FLIGHT CONTROLS
Table of Contents REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
CHAPTER 11 --- FLIGHT CONTROLS
Page
TABLE OF CONTENTS 11--00
Table of Contents 11--00--1
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