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Electrical Power
Doc # 6.02.01
Rev. 5 24-61-00 Page 1
20 Sep 2007
Section 24-61
DC Electrical Load Distribution - TAE 125 Diesel Engine
1. General
This Section tells you about the system which supplies DC electrical power for other systems. The
DC electrical load distribution system has these components:
) Main bus.
) Relay junction box bus.
) ECU bus.
) Avionic bus.
) Essential bus.
) Essential avionic bus.
) Hot battery bus.
) Battery relay.
) Power relay.
) Avionics master relay.
) Essential avionics relay.
) Essential tie relay.
) Switches.
) Circuit-breakers.
) Fuses.
Figure 1 shows the electrical system bus structure diagram of the electrical distribution system. Figure
2 shows the layout of the switches and circuit-breakers in the instrument panel.
This Section gives you the trouble-shooting and maintenance practices for the electrical distribution
system. Refer to Section 24-01 for the full system description and operation.
AIRCRAFT
Electrical Power DA 40 Series
AMM
Page 2
20 Sep 2007 24-61-00 Doc # 6.02.01
Rev. 5
5A
5A
5A
5A
5A
100A
Alternator
Main Battery
Battery Relay
OFF
ON
START
PWR
Power Relay
ECU A
ECU B
MAIN
TIE
MAIN
TIE
ESS
TIE
Essential Tie Relay
Essential Bus Switch
Avionics Master Switch
ESS AV.
Essential Avionics Relay
ECU ALT
MASTER
CONTROL
25
25
25
30
30
30
25
5
2
OFF
OFF
ON
ON
Key Switch FI
RE
WALL
INSTRUMENT PANEL ENGINE COMPARTMENT
MAIN
BUS
MAIN
BUS
ECU
BUS
HOT
BATTE
RY
B
US
ESSENTIAL
BUS
ESS
AVIONICS
BUS
Circuit-Breaker with Name and Rating
(Name as on the Placard)
Fuse with Rating
LEGEND
AV. BUS
25
Avionics Master Relay
AVIONIC
B
US
14 VDC ACCESSORY PWR.
GROUND OPS. ONLY 2A MAX
RELAY
JUNCTION
BOX
B
US
100A
Figure 1: Electrical System Bus Structure Diagram
AIRCRAFT
DA 40 Series
AMM
Electrical Power
Doc # 6.02.01
Rev. 5 24-61-00 Page 3
20 Sep 2007
5 25 25 70 30 3 3 5 5 5
5 25 25 70 30 3 3 5 5 5 10 10 10 10 25 5 10 15 2 3 3 3 10 5 3 25 10 3 3 5 15 5 3 30 2
KNOTS
160
120
140
AIRSPEED
100
80
60
40
PULL
CAGETO
20
20
10
10
10
10
20
20
0
IN .Hg
C AL IBRAT ED
T O
2 0,0 0 0 F EE T
m b
28. 7
28.8
975 28.6
970
100FEET
1
2
3
4
5
6
7
8
9
ALT
0
10
UP
DOWN
10
5
VERTICAL SPEED
100 FEET PER MINUTE
5
15
15
20
20
2 MIN.
D.C.
ELEC.
TURN COORDINATOR
NO PITCH
INFORMATION
L R
24
27
30
33
21
18
15
12
9
6
3
0
PUSH
24
27
30
33
21
18
15
12
9
6
3
0
OBS
NAV
VLOC
GPS
TO
ON
ON
OFF
OFF
INSTRUMENT
FLOOD
ECU
ECU
TEST
SWAP
UT
FT
LT
SEL E C T
O .A .T . VO LT S
CO NT RO L
DAV TRON
ET
S
4
5
6
U
C T I
O
N
14 VDC ACCESSORY PWR
GROUND OPS . ONLY 2A MAX
CAUTION
WARNING
WHI TE WIRE
START
DOORS
LOW VOLTS
ENGINE FUEL TRANS GLOW
ECU A
ECU B TRIM FAI L
LOW FUEL
ALTERNATOR PITOT
ISO MU
T
E
OFF
VOLUME SQUELCH VOLUME SQUELCH
PILOT CO-PILOT
PWR/XMT
ALL
T/O V = 108 kts F E
108 KIAS
91 KIAS
LDG V = 91 kts F E
max.
max.
GARMIN
P WR
P USH
P USH
VOL
VOL
SQ
I D
C
C
V
V
D
RNG
CLR
DEFA ULT
NAV
ENT
GPS
GNS 4 30
MENU
PUSH
C/V
PUSH
CRSR
COM
VLOC
COS
136.975
VLOC
117.95
TERM
GPS
KHPN
KHPN
NAV
CDI OBS MSG FPL PROC
WPT
DIS
TKE
GS
4.85
　
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