Cabin lighting consists of entry, overhead,
table and reading lights (spot lights), and lava-
tory lights.
Tailcone baggage lighting is provided within
the baggage compartment. Tailcone mainte-
nance lighting consists of lighting within the
tailcone equipment compartment.
Additional interior lighting consists of an
emergency cabin lighting package that uti-
lizes existing overhead lights, additional exit
lights and seat base mounted floor proximity
lights. Optional exterior lighting is available
to illuminate the general areas around the bag-
gage compartment and the single-point pres-
sure refueling (SPPR) area. Logo lights that
illuminate the vertical stab and pulse mode ex-
terior lights are also available.
INTERIOR LIGHTING
The interior lighting locations for the cockpit,
cabin, baggage and maintenance areas of the
airplane are illustrated in Figure 3-1.
COCKPIT LIGHTING
Cockpit lighting is controlled through two
cockpit control panels (Figures 3-3 and 3-4)
and two light control units (LCUs) that are lo-
cated within the forward avionics bay. Each
LCU (pilot LCU and copilot LCU) has four
separate channels that distribute power re-
sources to lighting groups. See Figure 3-2 and
the descriptions within this chapter.
Pilot Left Crew Lights Panel
The pilot’s L CREW LIGHTS panel (Figure
3-3) is 28 VDC powered from the left essen-
tial bus and protected by a circuit breaker la-
beled “CKPT INSTRS L ESS PWR,” located
within the LIGHTS group of circuit breakers
on the left side circuit breaker panel. The four
pilot LCU channels control:
• Channels 1 & 2–Pilot side main instru-
ment panel, overlays, and instruments.
• Channel 3–Pilot’s circuit breaker panel.
• Channel 4–Left side bulbs that illumi-
nate switch/indicators (S/I's).
Following is a description of each of the rheo-
stat/potentiometer controls located on the
pilot’s L CREW LIGHTS panel.
OVRHD – The cockpit can be illuminated by
a pair of overhead swivel lights. Each light is
individually controlled by the OVRHD rheo-
stat on the pilot and copilot switch panels.
The pilot overhead light can also be turned on
with the “COCKPIT” light switch on the main
entryway control panel (Figure 3-7), when
the main door is open and the OVRHD rheo-
stat on the left crew light panel is off. When
the upper main door is closed, to prevent in-
advertent “blinding” of the crew, cockpit over-
LEARJET 45 PILOT TRAINING MANUAL
3-2
FOR TRAINING PURPOSES ONLY
FlightSafety
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