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S Rotate the dimmer switch fully counterclockwise
to the OFF position.
S Set the ALT/BAT switch (Lycoming version) or
ELECTRIC MASTER key switch (TAE
version) to OFF.
The system light(s) must come on.
The intensity of the light(s) must
increase.
The light(s) must go off.
(8) Install the top engine cowling. Refer to Section 71-10 (Lycoming
version) or 71-11 (TAE version).
AIRCRAFT
Lights DA 40 Series
AMM
Page 204
20 Sep 2007 33-10-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Lights
Doc # 6.02.01
Rev. 5 33-40-00 Page 1
20 Sep 2007
Section 33-40
Exterior Lights
1. General
This Section tells you about the exterior lights on the DA 40.
2. Description
The DA 40 has 3 exterior lights in one light unit at each wing-tip. It also has landing and taxi lights in
a housing in the leading edge of the left wing. Figure 1 shows a wing-tip light unit.
AIRCRAFT
Lights DA 40 Series
AMM
Page 2
20 Sep 2007 33-40-00 Doc # 6.02.01
Rev. 5
Strobe Light Power Unit
Rear Position Light
Clear Glass
Front Position Light
Colored Glass
Strobe Light Filament
Strobe Light Cover
Retaining Cover
Screws
In-Line Connector
0-Ring Seal
LH SHOWN
Figure 1: Wing-Tip Light Unit and Strobe Power Unit
AIRCRAFT
DA 40 Series
AMM
Lights
Doc # 6.02.01
Rev. 5 33-40-00 Page 3
20 Sep 2007
A. Position Lights
The DA 40 has left and right position lights. The front part of the light unit has a red (left) lens or
green (right) lens. The light can be seen from the front or the side of the airplane.
The light unit also has rear position lights. The aft part of each light unit has a clear lens. The light
can be seen from the rear of the airplane only.
A switch on the left instrument panel controls the position lights and the system is protected by a
circuit-breaker.
B. Strobe Light (Anti Collision Light - ACL)
The middle part of each light unit has a clear lens for a strobe light. The filament gives a high
intensity flash. This is followed immediately by a less-bright flash. The double flashes occur about
50 times per minute. The strobe lights can be seen from all round the airplane.
A separate power unit for each strobe light is mounted in the wing tip. A switch on the left
instrument panel controls both the strobe lights and the system is protected by a circuit-breaker.
The power unit generates an electrical impulse of about 600 volts. The pulse ionizes the gas in the
strobe light filament which causes a bright flash. A second less powerful flash occurs immediately
after the main pulse.
C. Landing Light
The landing light is located in a housing in the leading edge of the left wing. The landing light has
a clear lens and a 35 watt filament. It is located inboard in the housing. A switch on the left
instrument panel controls the light and a circuit-breaker protects the system.
D. Taxi Light
The taxi light is located in a housing in the leading edge of the left wing. The landing light has an
optic lens and a 35 watt filament. It is located outboard in the housing. A switch in the left
instrument panel controls the light and a circuit-breaker protects the system.
AIRCRAFT
Lights DA 40 Series
AMM
Page 4
20 Sep 2007 33-40-00 Doc # 6.02.01
Rev. 5
Landing Light
Taxi Light
Screw
Washer
Landing/Taxi Light Assembly Cover
Retaining
Screw
Mounting Bracket
Figure 2: Landing and Taxi Light Installation
AIRCRAFT
DA 40 Series
AMM
Lights
Doc # 6.02.01
Rev. 5 33-40-00 Page 101
20 Sep 2007
Trouble-Shooting
1. General
The table below lists the defects you could have with the exterior light system. If you have the trouble
detailed in the Trouble column read across to the Possible Cause column. Then do the repair given
in the Repair column.
Trouble Possible Cause Repair
Both position lights do not
operate.
Circuit breaker not set or
defective.
Defective position light switch.
Defective wiring.
Set/Replace the circuitbreaker.
Replace the switch.
Repair/Replace the wiring.
Refer to Chapter 92 for the
wiring diagrams.
One position light does not
operate.
Defective filament.
Defective wiring.
Replace the filament.
Repair/Replace the wiring.
Refer to Chapter 92 for the
wiring diagrams.
Both strobe lights do not
operate.
Circuit-breaker not set or
defective.
Defective switch.
　
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