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(8) Connect the ECU backup battery. Refer to Section 24-34. Connect the
positive cable first.
(9) Install the top engine cowling. Refer to Section 71-11.
(10) Do a functional test of the circuit-breaker:
S Set the ELECTRIC MASTER key switch to
ON.
S Operate the electrical system related to the
circuit-breaker you will test.
S Pull the circuit-breaker.
S Close the circuit-breaker.
S Set the ELECTRIC MASTER key switch to
OFF.
Apply the full electrical load to the
system.
The system must stop operating. Make
sure there is no power to the system.
AIRCRAFT
DA 40 Series
AMM
Electrical Power
Doc # 6.02.01
Rev. 5 24-61-00 Page 205
20 Sep 2007
5. Remove /Install an Instrument Panel Switch
This procedure applies to the following switches:
) PITOT.
) LANDING, TAXI, POSITION and STROBE lights.
) ESS. BUS.
) AVIONIC MASTER.
) FUEL TRANS ».
A. Remove an Instrument Panel Switch
Detail Steps/Work Items Key Items/References
(1) Remove the top engine cowling. Refer to Section 71-11.
(2) Disconnect the battery:
S Disconnect the negative cable from the
battery.
S Disconnect the positive cable from the
battery.
Refer to Section 24-34.
(3) Remove the instrument panel cover. Refer to Section 25-10.
(4) Disconnect the electrical cables from the switch
that you will remove.
(5) Remove the switch from the instrument panel:
S Press the locking clips at the side of the
switch to release the switch from the
instrument panel.
S Move the switch forward through the
instrument panel and clear of the airplane.
With your fingers from the back of the
instrument panel.
AIRCRAFT
Electrical Power DA 40 Series
AMM
Page 206
20 Sep 2007 24-61-00 Doc # 6.02.01
Rev. 5
B. Install an Instrument Panel Switch
Detail Steps/Work Items Key Items/References
(1) Hold the spring clips on the switch compressed
and put the switch in position in the instrument
panel.
From the front of the instrument panel.
Make sure that the clips have
expanded and that the switch is
correctly located.
(2) Connect the electrical cables to the switch. Refer to Chapter 92 for the Wiring
Diagrams.
(3) Install the instrument panel cover. Refer to Section 25-10.
(4) Connect the main battery. Refer to Section 24-34. Connect the
positive cable first.
(5) Install the top engine cowling. Refer to Section 71-11.
(6) Do a functional test of the switch:
S Set the ELECTRIC MASTER key switch to
ON.
S Set the switch that you have installed to ON.
S Set the switch that you have installed to OFF.
S Set the ELECTRIC MASTER key switch to
OFF.
The system must operate correctly.
The system must switch off.
AIRCRAFT
DA 40 Series
AMM
Electrical Power
Doc # 6.02.01
Rev. 5 24-61-00 Page 207
20 Sep 2007
6. Remove /Install the ENGINE Switch
A. Remove the ENGINE Switch
Detail Steps/Work Items Key Items/References
(1) Remove the top engine cowling. Refer to Section 71-11.
(2) Disconnect the battery:
S Disconnect the negative cable from the
battery.
S Disconnect the positive cable from the
battery.
Refer to Section 24-34.
(3) Disconnect the ECU backup battery:
S Disconnect the negative cable from the
battery.
S Disconnect the positive cable from the
battery.
Refer to Section 24-34.
(4) Remove the instrument panel cover. Refer to Section 25-10.
(5) Disconnect the alternator excitation battery:
S Disconnect the negative cable from the
battery.
S Disconnect the positive cable from the
battery.
Refer to Section 24-33.
(6) Remove the nut and washers that attach the
switch.
(7) Move the switch towards the firewall. To give access to the electrical cable
connection on the switch.
(8) Disconnect the electrical cables from the
ENGINE MASTER switch.
(9) Remove the switch from the instrument panel.
AIRCRAFT
Electrical Power DA 40 Series
AMM
Page 208
20 Sep 2007 24-61-00 Doc # 6.02.01
Rev. 5
B. Install the ENGINE Switch
Detail Steps/Work Items Key Items/References
(1) Put the switch in position adjacent to the switch
electrical cables.
(2) Connect the electrical cables to the switch. Refer to Chapter 92 for the Wiring
Diagrams.
(3) Push the switch into position in the instrument
panel.
(4) Install the washer and nut to the switch.
(5) Connect the alternator excitation battery:
S Connect the positive cable to the battery.
　
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