Airplane Maintenance Manual
Bristell
B23-915
Chapter 24
supplement
Chapter 24 Page 4
Issue: 09.12.2021
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 and dimmer
•
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 aileron and elevator
trim are on the grip of control stick. Wiring diagrams are shown in
Chapter 91.
Switches
Switch-Breaker
Designation
Description
MAIN PUMP
Electric fuel pump switch
-
LANE-A
LANE-A
-
LANE-B
LANE-B
-
START POWER
Start power toggle switch (spring
loaded)
-
ENGINE START Engine start button
-
MASTER
Main switch
-
GEN A/B
Generator A/B (int. generators)
x
ALT C
Alternator C (ext. alternator)
x
AVIONICS
G3X system, NAV/COM,
Transpoder, intercom
x
EFIS
EFIS
x
PITOT H.
Pitot heat
x
STROBE
Strobe light
x
NAV-L
Navigation/position lights
x
LDG | WIGWAG Landing light and wigwag light
-