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The EMERGENCY LTS-NORM switch on the left service cabinet near
the entry door provides for manual illumination of the emergency
lights . When the switch is set to EMERGENCY LTS, the upper cabin entry
door light, the emergency egress door light, and the forward and aft
cabin overhead fluorescent lights will illuminate. Fornormal operation,
the switch should be set to NORM. Setting the switch to NORM does
not hinder automatic illumination of the emergency lights in the event
of an electrical system failure.
PM-121
4-31
Change 3
Pilot's Manual
Learjet 31A
EMERGENCY LIGHTING SYSTEM (OPTIONAL) -
LATE DESIGN
The emergency lighting system provides cabin and exit lighting in the
event of normal electrical system failure. The system consists of two
emergency batteries, an upper cabin entry door light, an emergency
wing egress light, an EMERGENCY EXIT LIGHTS control panel, and
associated wiring. The forward exit door light, left and right, fore and
aft passenger reading lights, the aisle proximity lights and wing egress
light are used to provide lighting for emergency egress. The batteries
are charged through the 10-amp EMER ITS circuit breaker located on
the copilot's circuit breaker panel. If armed, the system will automatically
activate whenever normal electrical power is lost. Therefore, the
system will automatically activate during the EMER BUSmode.
EMERGENCY EXIT LIGHTS CONTROL PANEL
TheEMERGENCYEXIT LIGHTS control panel, in the cockpit pedestal,
provides control, testing, and indicating functions for the emergency
exit lighting system . The panel includes: one control switch (ONARMED-
OFF/RESET), one test switch, (TEST BAT 1-NORM-TEST
BAT 2), one white ON annunciator, and one amber NOTARMED annunciator.
CONTROLSWITCH
Functions of the control switch are shown in the following table:
Switch Position
System Response
OFF/RESET
The relays in both battery units will reset to off and all
emergency exit lighting will go out. Pressing the push
button switch in the cabin entry door will activate the
system while held . Upon release, the system will reset
to off.
ARMED
Arms the system to automatically activate should normal
electrical power be lost . Selecting ARMED prior
to powering up the aircraft will cause the system to
activate immediately. Pressing the push button switch
in the cabin door will manually activate the system .
ON
To manually activate the system, hold switch momentarily
to ON and release. The switch will spring back
to the ARMED position and the system will remain
activated.
4-32
PM-121 Change 3
Learjet 31A
Pilot's Manual
TEST SWITCH
The test switch is a three-position switch spring loaded to the NORM
position . The test switch is used to verify that each battery unit is capable
of powering all the emergency exit lighting by itself.
To test system:
1. Aircraft BATTERY Switches-On.
2. EMERGENCYEXIT LIGHTS Switch -ARMED.
3. TEST Switch -BAT 1 and hold. White ON annunciator illuminates.
Fore and aft reading lights, aisle proximity lights, and
door and wing egress lights illuminate .
4. TEST Switch-BAT 2 and hold. White ON annunciator illuminates.
Fore and aft reading lights, aisle proximity lights, and
door and wing egress lights illuminate.
5. TEST Switch - Release to NORM. Emergency exit lighting
resets to off and ON annunciator extinguishes.
ANNUNCIATORS
Description of theON andNOTARMED lights is shownin the following
table:
Annunciation
MEANS
ON
The emergency lights are illuminated either manually
(WHITE)
or automatically. Also annunciates during test .
NOTARMED
The aircraft is powered up and the system is not
(AMBER) armed.
PM-121
4-33 Change 3
Pilot's Manual
Learjet 31A
MASTER WARNING AND ANNUNCIATOR PANEL LIGHTS
The master warning lights on the pilot's and copilot's instrument panels
and annunciator panel lights on the glareshield give a visual indication
of various systems operating conditions . The annunciator panel
lights are green, amber, or red. The master warning lights are coupled
to the red warning lights on the annunciator panel and the red warning
light on the electric power monitor. If a red warning light on the annunciator
panel or electric power monitor comes on, the MSTR WARN
lights will light and flash. Depressing the MSTR WARN light lens will
extinguish the MSTR WARN light, but the specific red warning light
which triggered theMSTRWARN will remain lighted as long as the abnormal
condition exists .
Learjet 31A
　
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