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Defective wiring.
Set/Replace the circuitbreaker.
Replace the switch.
Repair/Replace the wiring.
Refer to Chapter 92 for the
wiring diagrams.
One strobe light does not
operate.
Defective power supply unit.
Defective strobe unit.
Defective wiring.
Replace the power supply unit.
Replace the strobe unit.
Repair/Replace the wiring.
Refer to Chapter 92 for the
wiring diagrams.
Strobe and position light does
not operate on one side.
Connector at wing root
disconnected.
Connect the connector.
AIRCRAFT
Lights DA 40 Series
AMM
Trouble Possible Cause Repair
Page 102
20 Sep 2007 33-40-00 Doc # 6.02.01
Rev. 5
Landing light or taxi light does
not operate.
Defective light unit.
Circuit-breaker not set or
defective.
Defective landing light or taxi
light switch.
Loose connector at the light
unit.
Defective wiring.
Replace the light unit.
Set/Replace the circuitbreaker.
Replace the related switch.
Connect the connector
correctly.
Repair/Replace the wiring.
Refer to Chapter 92 for the
wiring diagrams.
AIRCRAFT
DA 40 Series
AMM
Lights
Doc # 6.02.01
Rev. 5 33-40-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
These maintenance practices tell you how to remove/install defective filaments and light units. They
tell you how to adjust the landing light and the taxi light. They also tell you how to remove/install
components in the system. Refer to Chapter 92 for the wiring diagrams.
WARNING: DO NOT OPERATE THE STROBE LIGHTS WHEN PERSONS ARE
CLOSE TO THE AIRPLANE AND DO NOT LOOK AT THE LIGHT WHEN
IT OPERATES. STROBE LIGHTS CAN CAUSE EYE DAMAGE.
WARNING: AFTER YOU SET THE POWER TO OFF, MAKE SURE THAT YOU WAIT
A MINIMUM OF FIVE MINUTES BEFORE YOU DO WORK ON THE
STROBE LIGHTS. THE POWER SUPPLIES TO THE STROBE LIGHTS
GENERATE HIGH VOLTAGE. HIGH VOLTAGE CAN CAUSE DEATH OR
INJURY TO PERSONS.
2. Remove/Install the Taxi Light
A. Remove the Taxi Light
Detail Steps/Work Items Key Items/References
(1) Set the ALT/BAT switch (Lycoming version) or
ELECTRIC MASTER key switch (TAE version) to OFF.
(2) Set the TAXI light switch to OFF.
(3) Set the TAXI/MAP circuit -breaker open.
(4) Remove the taxi/landing light cover from the wing:
S Remove the 12 screws which attach the light cover
to the wing.
S Pull the light cover clear of the wing.
(5) Remove the screws which attach the taxi light to the
wing.
The taxi light is the outboard
assembly. Refer to Figure 2.
(6) Hold the taxi light and carefully move it out from the
wing:
S Disconnect the electrical connector from the rear of
the taxi light.
S Remove the taxi light.
AIRCRAFT
Lights DA 40 Series
AMM
Page 202
20 Sep 2007 33-40-00 Doc # 6.02.01
Rev. 5
B. Install the Taxi Light
Detail Steps/Work Items Key Items/References
(1) Hold the taxi light in position in the leading edge of the
left wing.
S Connect the electrical connector to the rear of the
taxi light.
(2) Install the screws which attach the taxi light assembly to
the wing.
(3) Set the ALT/BAT switch (Lycoming version) or
ELECTRIC MASTER key switch (TAE version) to ON.
(4) Set the TAXI/MAP circuit -breaker Closed
(5) Set the TAXI light switch to ON.
(6) Set the TAXI light switch to OFF.
(7) Set the ALT/BAT switch (Lycoming version) or
ELECTRIC MASTER key switch (TAE version) to OFF.
(8) Install the taxi/landing light cover to the wing:
S Put the light cover in position on the wing.
S Install the 12 screws which attach the light cover to
the wing.
3. Remove/Install the Landing Light
A. Remove the Landing Light
Detail Steps/Work Items Key Items/References
(1) Set the ALT/BAT switch (Lycoming version) or
ELECTRIC MASTER key switch (TAE version) to OFF.
(2) Set the LANDING light switch to OFF.
(3) Set the LANDING circuit -breaker open.
(4) Remove the taxi/landing light cover from the wing:
S Remove the 12 screws which attach the light cover
to the wing.
S Pull the light cover clear of the wing.
AIRCRAFT
DA 40 Series
AMM
Lights
Detail Steps/Work Items Key Items/References
Doc # 6.02.01
Rev. 5 33-40-00 Page 203
20 Sep 2007
(5) Remove the screws which attach the landing light to the
wing.
The landing light is the inboard
assembly. Refer Figure 2.
(6) Hold the landing light and carefully move the light out
from the wing:
S Disconnect the electrical connector from the rear of
　
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