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OPY
EP
U
BATTERY GEN. COGNETNR.OL
ELECTRICAL
DME ADF
AVIONICS
MARKER HSI
2
2
2
5
1
2
10
10
2
1
50
3
3
3
5
5
25
50
ENGINE
OIL PRESS OIL TEMP
START FUEL PRESS
SLIP
FUEL QTY.
SYSTEM
FLAPS TRIM O.A.T. &
FUEL
PUMP
PITOT
HEAT
TURN
EGT
LANDING TAXI/MAP
LIGHTS
STROBE INST. POSITION PULSE LIGHT
3 3 3
5 5
AVIONICS
CONTROL
MASTER MASTER ICS ATC NAV/COM
1 GPS
OFF
PRIME
Figure 1: Independent Instruments
DA20-C1 AMM
Indicating Systems
Doc # DA201-C1
Rev. 0 31-20-00 Page 101
19 Dec 1997
TROUBLE-SHOOTING
1. General
Use the data below to trouble-shoot the independent instruments.
Complaint Possible Cause Remedy
Clock does not operate. INST LIGHTS circuit-breaker
open.
Wiring defective.
Close the circuit-breaker.
Do resistance and short-circuit
tests between the circuitbreaker
and the clock. Repair
the defective connection or
wire. See Chapter 92 for
wiring diagrams.
Clock does not keep the correct
time.
Clock battery discharged.
Clock defective.
Remove the clock. Replace
the battery. See the clock
manufacturers instructions.
Replace the clock.
Engine-operated hours meter
does not operate.
Oil pressure sensor defective.
Hours meter defective.
High resistance or open
connection in the electrical
wiring from the oil pressure
sensor.
Replace the oil pressure
sensor.
Replace the hours meter.
Do resistance and short-circuit
tests between the meter and
the sensor. Repair the
defective connection or wire.
See Chapter 92 for wiring
diagrams.
Indicating Systems
DA20-C1 AMM
Page 102
19 Dec 1997 31-20-00 Doc # DA201-C1
Rev. 9
Intentionally left blank
DA20-C1 AMM
Indicating Systems
Doc # DA201-C1
Rev. 0 31-20-00 Page 201
19 Dec 1997
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove/install the independent instruments. See
Chapter 92 for wiring diagrams.
2. Remove/Install the Clock
A. Remove the Clock
Detail Steps/Work Items Key Items
(1) Remove the instrument panel cover. Refer to chapter 25-10
(2) Open the INST LIGHTS circuit breaker.
(3) Remove 4 screws which attach the clock.
(4) Lift the clock from the instrument panel.
B. Install the Clock
Detail Steps/Work Items Key Items
(1) Put the clock in the instrument panel.
(2) Install 4 screws and nuts which attach the
clock.
(3) Close the INST LIGHTS circuit breaker.
(4) Install the instrument panel cover. Refer to chapter 25-10
Indicating Systems
DA20-C1 AMM
Page 202
19 Dec 1997 31-20-00 Doc # DA201-C1
Rev. 9
3. Remove/Install The Engine Operated Hours Meter
A. Remove The Engine Operated Hours Meter
Detail Steps/Work Items Key Items
(1) Disconnect the battery. Refer to chapter 24-31
(2) Remove the instrument panel cover. Refer to chapter 25-10
(3) Release 2 faston connectors from the
engine-operated hours meter.
(4) Remove 2 screws and nuts which attach the
meter.
(5) Remove the meter from the instrument
panel.
B. Install The Engine Operated Hours Meter
Detail Steps/Work Items Key Items
(1) Put the meter in the instrument panel.
(2) Install the 2 attaching screws and nuts.
(3) Connect 2 faston connectors to the engineoperated
hours meter.
See Chapter 92 for wiring diagrams.
(4) Install the instrument panel cover. Refer to chapter 25-10
(5) Connect the battery. Refer to chapter 24-31
DA20-C1 AMM
Indicating Systems
Doc # DA201-C1
Rev. 0 31-50-00 Page 1
19 Dec 1997
CHAPTER 31-50
WARNING SYSTEMS
1. General
The DA20-C1 has 3 standard warnings. It has a CANOPY warning, a GEN warning and a START
warning. An EPU warning is installed on airplanes with the optional external power socket.
2. Description and Operation
Figure 1 shows the location of the warnings. The warnings are in two annunciator units at the top of
the instrument panel. The left unit has the GEN (Red) and the CANOPY (Red) warnings. The right
unit has the START (Red) and optional EPU (Amber) warnings.
Each warning unit has a test switch. Press the front of the unit to operate the test switch. (The
BAT/GEN switch must be ON). The FUEL PRESS/OIL PRESS circuit-breaker supplies power for
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