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DA20-C1 AMM
Navigation
Doc # DA 201-C1
Rev. 8 34-10-00 Page 201
24 Oct 2001
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove, install and test the flight environment
systems. Refer to the manufacturers manuals for further data.
2. Remove/Install a Pitot-Static Instrument
A. Remove a Pitot-Static Instrument
Detail Steps/Work Items Key Items
(1) Remove the instrument panel cover. Chapter 25-10
(2) Disconnect the pitot/static pipe(s) from the
rear of the indicator.
(3) Remove the mounting screws. Hold the instrument!
(4) Remove the instrument from the panel.
B. Install a Pitot-Static Instrument
Detail Steps/Work Items Key Items
(1) Remove the port cover from the new
instrument. Install it on the replacement
instrument.
(2) Transfer the pitot/static fitting(s) to the new
instrument.
(3) Put the instrument in position in the panel.
(4) Install the mounting screws.
(5) Connect the pitot/static pipe(s) to the rear of
the indicator.
(6) Do a low-range static leak test. Paragraph 10
(7) For the ASI only:
Do a pitot-static leak test.
Paragraph 10
(8) Install the instrument panel cover. Chapter 25-10
Navigation
DA20-C1 AMM
Page 202
24 Oct 2001 34-10-00 Doc # DA 201-C1
Rev. 8
3. Remove/Install the Pitot-Static Probe (probe without optional Pitot Heat)
A. Remove the Pitot-Static Probe
Detail Steps/Work Items Key Items
(1) Remove the attaching screws for the probe
from below the wing.
Hold the probe!
(2) Move the probe down to give access to the
connections.
(3) Disconnect the pitot and static pipes. Identify the connections. Put caps on the
pipes.
(4) Disconnect the bonding cable.
(5) Remove the pitot-static probe.
B. Install the Pitot-Static Probe
Detail Steps/Work Items Key Items
(1) Hold the pitot-static probe close to the
mounting below the wing.
(2) Connect the bonding cable.
(3) Connect the pitot and static pipes.
(4) Put the probe in position on the mounting.
(5) Install the attaching screws.
(6) Do a low-range static leak test. Paragraph 10
(7) Do a pitot-static leak test. Paragraph 10
(8) Put a cap on the pitot-static probe.
DA20-C1 AMM
Navigation
Doc # DA 201-C1
Rev. 8 34-10-00 Page 203
24 Oct 2001
4. Remove/Install and Functional Check of the Pitot-Static Probe (Probe with optional Pitot
Heat System).
A. Remove the Pitot-Static Probe
Detail Steps/Work Items Key Items
(1) Open the PITOT HEAT circuit breaker.
(2) Open the access panel beside the pitotstatic
probe.
(3) Remove the high thermal limit switch. Disconnect wiring, remove 2 screws.
Gently pry between switch and bracket to
separate bonding adhesive.
(4) Remove the attaching screws for the probe. Hold the probe!
(5) Remove inner gasket (phenolic).
(6) Move the probe down to give access to the
connections.
(7) Disconnect the electrical connector.
(8) Disconnect the pitot and static pipes. Identify the connections. Put caps on the
pipes.
(9) Disconnect the bonding cable.
(10) Remove the pitot-static probe with switch
bracket.
(11) Remove pitot -static probe from switch
bracket.
Remove outer gasket. Gently pry between
bracket and probe to separate the bonding
adhesive.
B. Install the Pitot-Static Probe
Detail Steps/Work Items Key Items
(1) Install switch bracket on pitot static probe.
Use NON-SILICONE thermally conductive
adhesive (commercially available).
Follow the adhesive manufacturer’s
instructions.
(2) Hold the pitot-static probe close to the
mounting below the wing.
(3) Connect the bonding cable.
(4) Connect the pitot and static pipes.
(5) Connect the electrical connector.
(6) Put the probe in position on the wing.
(7) Bond high thermal limit switch to bracket
with adhesive. Use NON-SILICONE thermal
conductive adhesive (commercially
　
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