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Lights
Doc # DA201-C1
Rev. 9 33-20-00 Page 101
29 Apr 2004
TROUBLE SHOOTING
1. General
Use the data below to trouble-shoot the cockpit lighting systems.
Complaint Possible Cause Remedy
Instrument panel lighting does
not operate.
Circuit-breaker not set.
Defective instrument light
switch.
Defective rheostat.
Defective lighting control
module
Defective wiring.
Set the circuit-breaker.
Replace the switch.
Replace the rheostat.
Check wiring and
repair/replace lighting control
module
Do a continuity test of the
wiring. Repair/ replace
defective wiring. See Chapter
92 for wiring diagrams.
Map light does not operate. Circuit-breaker not set.
Defective map light switch.
Defective wiring.
Set the circuit-breaker.
Replace the switch.
Do a continuity test of the
wiring. Repair/ replace
defective wiring. See Chapter
92 for wiring diagrams.
Compass light does not operate
when the DIM/BRIGHT switch is
set to DIM. Trim and flap
selector switches dim correctly.
Compass light bulb failed.
Defective wiring.
Replace the bulb.
Do a continuity test of the
wiring. Repair/ replace
defective wiring. See Chapter
92 for wiring diagrams.
Compass light does not operate
when the DIM/BRIGHT switch is
set to DIM. Trim and flap
selector switches do not dim
correctly.
Flap circuit-breaker not set.
Defective DIM/BRIGHT switch.
Defective wiring.
Set the flap circuit-breaker.
Replace the switch.
Do a continuity test of the
wiring. Repair/ replace
defective wiring. See Chapter
92 for wiring diagrams.
Lights
DA20-C1 AMM
Page 102
19 Dec 1997 33-20-00 Doc # DA201-C1
Rev. 0
Intentionally left blank
DA20-C1 AMM
Lights
Doc # DA201-C1
Rev. 9 33-20-00 Page 201
19 Dec 1997
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove/install the general instrument light and map
light module. Refer to Chapter 92 for details of the electrical wiring.
2. Remove/Install The General Instrument Light/Map Light Module
A. Remove The General Instrument Light/Map Light Module
Detail Steps/Work Items Key Items
(1) Set the GEN/BAT switch to OFF.
(2) Remove the nuts that attach the module to
the fuselage.
(3) Hold the module and disconnect the wiring
harness.
− Remove the module.
B. Install The General Instrument Light/Map Light Module
Detail Steps/Work Items Key Items
(1) Put the module in position and connect the
wiring harness.
(2) Install the nuts that attach the module to the
fuselage.
(3) Set the GEN/BAT switch to ON.
− Set the INST/TAXI light circuit breakers
to closed.
− Set the MAP switch to ON. Make sure
the map light comes on.
− Set the INST switch to ON. Make sure
the two instrument lights come on.
− Make sure the dimming control operates
correctly.
− If necessary, adjust the lights to align
correctly.
The map light is in the center of the
module.
The two instrument lights are on the
outboard of the module.
Cover the canopy with a dark clean cover
when you adjust the lights.
Refer to Figure: 2
Lights
DA20-C1 AMM
Page 202
19 Dec 1997 33-20-00 Doc # DA201-C1
Rev. 0
Figure 1: General Instrument Light/Map Light Adjustment
DA20-C1 AMM
Lights
Doc # DA201-C1
Rev. 0 33-40-00 Page 1
19 Dec 1997
CHAPTER 33-40
EXTERIOR LIGHTS
1. General
This Chapter tells you about the exterior lights.
2. Description
The DA20-C1 has 3 exterior lights in one light-unit at each wing-tip. It also has landing and taxi
lights in a housing in the left wing. Figure 1 shows the wing-tip light-unit.
Lights
DA20-C1 AMM
Page 2
24 Mar 1999 33-40-00 Doc # DA201-C1
Rev. 1
B
Anti-Collision Lamp Tube
Anti-Collision Lamp Glass
Rear Position Light Bulb
Rear Position Light Glass
Left/Right Position Light Bulb
Left/Right Position Light Glass
Light-Unit Attaching Screws
Light-Unit Cover
Attaching Screws
B
B
A
A
Anti-Collision Lamp
Power Supply Unit
FUSELAGE
Seal Ring
Rubber Seal
Figure 1: Wing-Tip Light-Unit and Power Supply
DA20-C1 AMM
Lights
Doc # DA201-C1
Rev. 9 33-40-00 Page 3
29 Apr 2004
A. Position Lights
The DA20-C1 has left and right position lights. The front part of the light-unit has a red (left) or
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