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Water in the system.
Replace the indicator.
Clear the hose.
Drain the water.
Pitot heat does not operate. Pitot Heat circuit-breaker open.
Pitot Heat circuit-breaker
defective.
Pitot Heat wiring open-circuit
Pitot probe defective.
Close the circuit-breaker. If the
circuit-breaker opens again, do
a test for a short -circuit in the
Pitot Heat wiring.
Replace the circuit-breaker.
Do a continuity test of the
wiring. Repair or replace
defective wiring.
Replace the Pitot probe.
OAT indicator gives incorrect
indication.
OAT circuit-breaker open or
defective.
Defective power supply cable.
Close the circuit-breaker. Or
replace the circuit-breaker.
Repair the cable.
AIRCRAFT
Navigation
DA 40 Series
AMM
Page 102
20 Sep 2007 34-10-00 Doc # 6.02.01
Rev. 5
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AIRCRAFT
DA 40 Series
AMM
Navigation
Doc # 6.02.01
Rev. 5 34-10-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
These maintenance practices tell you how to replace components of the environmental data system.
It also tells you how to test the Pitot-static system. Refer to the equipment manufacturers' manuals for
more data about the equipment.
2. Remove/Install a Pitot-Static Instrument
A. Remove a Pitot-Static Instrument
Detail Steps/Work Items Key Items/References
(1) Remove the instrument panel cover. Section 25-10.
(2) Disconnect the Pitot-static hose(s) from the rear
of the instrument.
(3) Remove the screws which attach the instrument
to the panel.
Hold the instrument!
(4) Remove the instrument from the panel.
B. Install a Pitot-Static Instrument
Detail Steps/Work Items Key Items/References
(1) Remove the port cover(s) from the new
instrument and fit to the removed instrument.
(2) If necessary, transfer the Pitot-static fittings to the
new instrument.
(3) Put the instrument in position in the panel.
(4) Install the screws which attach the instrument to
the panel.
(5) Connect the Pitot-static hoses to the rear of the
instrument.
(6) Do a low-range static leak check. Paragraph 5.
(7) For the ASI only:
S Do a Pitot-static leak check.
Paragraph 5.
(8) Install the instrument panel cover. Section 25-10.
AIRCRAFT
Navigation
DA 40 Series
AMM
Page 202
20 Sep 2007 34-10-00 Doc # 6.02.01
Rev. 5
3. Remove/Install the Pitot-Static Probe
A. Remove the Pitot-Static Probe
Detail Steps/Work Items Key Items/References
(1) Open the Pitot Heat circuit-breaker. Lower left instrument panel.
(2) Remove the Pitot access panel from the lower
surface of the wing.
Refer to Section 52-40.
(3) Move the probe down to give access to the
connections.
(4) Disconnect the electrical connector.
(5) Disconnect the Pitot and static hose connections. Identify the connections and put caps
on the hoses.
(6) Disconnect the bonding cable.
(7) Remove the screws which attach the Pitot probe
to the wing.
Hold the probe!
(8) Move the Pitot-static probe clear of the airplane.
B. Install the Pitot-Static Probe
Detail Steps/Work Items Key Items/References
(1) Put the Pitot probe in position on the wing.
(2) Install the attaching screws and connect the
bonding cable.
(3) Connect the Pitot and static hoses. Remove the caps from the hoses. Make
sure that you connect the hoses to the
correct locations.
(4) Connect the electrical connector.
(5) Do a test of the Pitot Heat system.
(6) Do a low-range static leak test, Paragraph 5.
(7) Do a Pitot-static leak test. Paragraph 5.
(8) Install a cap with a red pennant on the Pitot-static
probe.
AIRCRAFT
DA 40 Series
AMM
Navigation
Doc # 6.02.01
Rev. 5 34-10-00 Page 203
20 Sep 2007
4. Remove/Install the OAT Indicator
A. Remove the Davtron 301F (C) OAT Indicator
Detail Steps/Work Items Key Items/References
(1) Open the circuit-breaker for the OAT.
(2) Remove the instrument panel cover. Section 25-10.
(3) Remove the nut which attaches the OAT sensor
to the fuselage.
(4) Remove the temperature sensor cable from the
cable harness and disconnect the electrical cable
for the power supply.
(5) Remove the OAT indicator and sensor from the
airplane.
B. Install the Davtron 301F (C) OAT Indicator
Detail Steps/Work Items Key Items/References
(1) Put OAT indicator in position in instrument panel.
(2) Connect electrical connector for power supply.
(3) Put temperature sensor in position in fuselage
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钻石40系列AMM 2(73)
