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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