Bristell B23
Airplane Maintenance Manual
Chapter 24
Issue: 30-Sep-2020
Chapter 24 Page 7
24-60
DC Electrical Load Distribution
24-60-01 Switches and Circuit Breakers
The switches serve for switching ON/OFF individual electrical circuits.
There are two kinds of switches:
Switches
–
Circuit Breakers
•
switching ON/OFF and protecting the electrical circuit from
overloading together
Switches
•
the classical for avionics circuit (no circuit breakers)
•
the turn knob for flaps
•
the buttons for trims
Every switch is marked with a placard with designation of the circuit
(see following Table). The switches are located on the instrument
panel and on the middle channel. The buttons for ailerons and
elevator trim are on the grip of control stick. Wiring diagrams are
shown in Chapter 91.
Switches
Switch-Breaker
Designation
Description
MASTER
Main switch
-
ALT-1
Alternator 1 (internal alternator)
-
ALT-2
Alternator 2 (external alternator)
-
AVIONICS
G3X system, NAV/COM,
Transpoder, intercom
x
EFIS-L3
ESI-500
x
PITOT H.
Pitot heat
x
STROBE
Strobe light
x
NAV-L
Navigation/position lights
x
LDG | WIGWAG Landing light and wigwag light
-
FUEL PUMP
Electric fuel pump switch
x
DAY/NIGHT
Preset for LED brightness
-
BCK-BAT
Backup Battery for G3X system
-
Dimmer
Rotating knob dimming int. light
-
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