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green (right) lens. The light can be seen from the front and the side.
The light-unit also has the rear position lights. The aft part of each light-unit has a clear lens.
The lights can be seen from the rear only.
A switch on the left instrument panel controls the position lights.
B. Anti-Collision Lights (ACL)
The middle part of each light-unit has a clear lens for an ACL. The filament gives a highintensity
flash. This is followed immediately by a less-bright flash. The double flashes occur
about 50 times per minute. The ACLs can be seen from all round the airplane.
The power-unit for the ACLs is located under the left seat. The power unit has separate highvoltage
supplies for the left and right ACLs. A switch on the left instrument panel controls the
power supply for the ACLs.
The power unit generates electrical pulses of about 600 volts. The pulse ionizes the gas in the
ACL lamp which causes a bright flash. A second less powerful pulse follows 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 with a 100 watt bulb. It is located inboard in the housing. A switch on the
left instrument panel controls the landing light.
D. Taxi Light
− The taxi light is located in a housing in the leading edge of the left wing. The taxi light has an
optic lens with a 100 watt bulb. It is located outboard in the housing. A switch on the left
instrument panel controls the taxi light.
E. Recognition lights (optional)
− The recognition lights are located in a housing in the leading edge of the left wing. The
recognition lights have 3 optic lens with a 100 watt bulbs. They are located outboard in the
housing. A switch on the left instrument panel controls the recognition lights.
Lights
DA20-C1 AMM
Page 4
24 Mar 1999 33-40-00 Doc # DA201-C1
Rev. 1
Figure 2: Landing And Taxi Light Installation
DA20-C1 AMM
Lights
Doc # DA201-C1
Rev. 9 33-40-00 Page 5
29 Apr 2004
Figure 3: Landing and Recognition Lights

DA20-C1 AMM
Lights
Doc # DA201-C1
Rev. 0 33-40-00 Page 101
19 Dec 1997
TROUBLE SHOOTING
1. General
Use the data below to trouble-shoot the external lighting systems.
Complaint Possible Cause Remedy
Both position lights do not
operate.
Circuit-breaker not set or
defective.
Defective position light switch.
Defective wiring in forward
cockpit area.
Set/replace the circuitbreaker.
Replace the switch.
Do a continuity test of the
wiring. Repair/ replace
defective wiring. See Chapter
92 for wiring diagrams.
One position light does not
operate.
Defective bulb.
Defective wiring.
Replace the bulb.
Do a continuity test of the
wiring. Repair/ replace
defective wiring. See Chapter
92 for wiring diagrams.
Both ACLs do not operate. Circuit-breaker not set or
defective.
Defective switch.
Defective power supply unit.
Defective wiring.
Set/replace the circuitbreaker.
Replace the switch.
Replace the power supply
unit.
Do a continuity test of the
wiring. Repair/ replace
defective wiring. See Chapter
92 for wiring diagrams.
One ACL does not operate. Defective power supply unit.
Defective ACL lamp.
Defective wiring.
Replace the power supply
unit.
Replace the ACL lamp.
Do a continuity test of the
wiring. Repair/ replace
defective wiring. See Chapter
92 for wiring diagrams.
ACL and position light do not
operate on one side.
Connector at wing root
disconnected.
Connect the connector.
Lights
DA20-C1 AMM
Page 102
29 Apr 2004 33-40-00 Doc # DA201-C1
Rev. 9
Complaint Possible Cause Remedy
Landing light, taxi light Defective bulb.
Circuit-breaker not set or
defective.
Defective landing or taxi light
switch.
Defective wiring in forward
cockpit area.
Loose connector next to the
light.
Replace the bulb.
Set/replace the circuitbreaker.
Replace the switch.
Do a continuity test of the
wiring. Repair/ replace
defective wiring. See Chapter
92 for wiring diagrams.
Connect the connector
correctly.
Optional recognition lights do
not operate.
Defective bulb.
Circuit-breaker not set or
defective.
Defective landing or taxi light
switch.
Defective wiring in forward
cockpit area.
Loose connector next to the
light.
Replace the bulb.
Set/replace the circuitbreaker.
　
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