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and the master control panel. The cabin overhead lights are
powered by the left main bus and are protected by the CABIN circuit
breaker within the CABIN group on the pilot’s circuit breaker panel.
PASSENGER READING AND TABLE LIGHTS
Reading and table lighting consists of lights installed in the convenience
panels above the seats on each side of the cabin. The seats have
only one light, while the table lights consist of a two-light assembly, installed
above each table. Control for the reading lights is by the passenger
lighting control unit mounted near each passenger seat and by the
SPOTLIGHT switch on the entryway switch panel assembly. Power for
the reading lights is provided by the left and right non-essential bus
and they are protected by the L and R SPOT circuit breakers located
within the CABIN group on the pilot’s and copilot’s circuit breaker
panels.
GALLEY LIGHTS
Lighting (LEDs) for the passenger refreshment area is powered by the
right non-essential bus and protected by the GALLEY circuit breaker
within the CABIN group on the copilot’s circuit breaker panel.
Pilot’s Manual
PM-132A 4-33
LAVATORY LIGHTS
Lighting of the lavatory area consists of spotlights and downwash
lights.
The spotlights (one located on the left side above the toilet and one
located on the right side above the aft cabin stowage compartment)
are controlled using the READ, BAGGAGE, MIRROR LIGHTS switch
on the lavatory passenger control panel assembly.
The downwash lights run lengthwise on the left and right
convenience panels and are controlled using either the LAV LIGHTS
switch on the lavatory passenger control panel assembly or the
LAVATORY switch on the entryway switch panel assembly located
near the main cabin door.
All the lavatory lights are powered by the left and right non-essential
bus and are protected by the CABIN group LAV LIGHTS and L and R
SPOT LIGHT circuit breakers on the pilot’s and copilot’s circuit
breaker panels.
If installed, the optional lavatory mirror provides additional indirect
lighting of the lavatory area. The indirect lighting is controlled using
the same switch as the spotlights. Depressing the READ, BAGGAGE,
MIRROR LIGHTS switch on the lavatory passenger control panel
assembly will either illuminate or extinguish the optional mirror
indirect lighting.
Control of the NO SMOKING/FASTEN SEAT BELT signs is through a
switch located on the LIGHTS control panel in the cockpit. This switch
is a three-position switch labeled OFF, BELTS and NO SMOKING/
BELTS.
Pilot’s Manual
4-34 PM-132A
BAGGAGE/TAILCONE LIGHTING
Lighting for the baggage compartment consists of two overhead dome
lights. The lights are controlled by the LIGHTS toggle switch located on
the ceiling near the baggage compartment door. The baggage
compartment lights are powered by the airplane’s hot bus system. If inadvertently
left on, it will automatically extinguish when the access
door is closed.
The tailcone equipment bay internal light is also powered by the hot
bus system. The switch is located near the access door and if
inadvertently left on, the light automatically extinguishes when the
door is closed.
EMERGENCY LIGHTING SYSTEM
The emergency lighting system is standard and consists of cabin
discrete overhead, floor proximity lights (seat-base mounted lighting
units), and emergency exit area lights that illuminate in the event of a
failure of the normal electrical system. Control of the emergency
lighting system is through a three-position switch located on the
LIGHTS control panel.
The emergency lighting group consists of:
• 5 exit signs (2 per door, 1 on forward face of lavatory partition)
• 4 PSU lights
• 6 floor proximity lights (4 white lens, 2 red lens on each side of the aft
right emergency exit)
• Main door egress light (when upper door open)
• Emergency exit egress light
• Lavatory light
The cockpit EMER LIGHTS switch is lever-locked and labeled OFF,
ARM and ON. When the cockpit switch is in the OFF position, the
emergency lights are inhibited. When the cockpit switch is in the ON
position, the emergency lighting group illuminates.
Pilot’s Manual
PM-132A 4-35
Activation periods are limited by a timing circuit to a minimum of 10
minutes and a maximum of 12 minutes.
To function automatically, the cockpit switch must be in the ARM
position. Once armed, the emergency lighting system automatically
illuminates when normal electrical power is lost (dual generator
failure) or when the passenger oxygen mask deployment occurs. When
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