SERVICE KIT
SK 208-179B
(15) Make sure that the red A-ICE P RE SS LO W annunc iator comes on.
(16) Disconnect the horizontal, l ow-pres s ure swi tch c onnec t or on the right side of the airplane.
(17) Make sure that the red A-ICE PRESS LOW annunciator goes o ff.
(18) Connect th e horizontal, low-pressure switch connector o n the left side of the airplane.
(19) Make sure that the red A-ICE P RE SS LO W annunc iator comes on.
(20) Connect th e horizontal, low-pressure switch connector o n the left side of the airplane.
(21) Make sure that the red A-ICE PRESS LOW annunciator goes o ff.
(22) Put the F LUID CONTROL BACK U P switch to t he OFF po sition.
(23) Connect t he two horizon tal, low pressure s witc hes in the tailcon e.
E. Do the leak test and high pressure switch test as follows:
NOTE: It is possible that the red A-ICE PRESS LOW annuncia tor w il l come on momentaril y during
this test. This is okay.
(1) Close the shutoff v alves in the wings and in the propeller test tube as s emblies .
(2) Make sure that the empennage te st tube assem bly is op en.
(3) Put the EXTERNAL POWER switch to the BUS position.
(4) Put the F LUID CONTROL P RIMA RY s witch t o the HIGH position.
(5) Limit fluid flow through the empennage shutoff valve until the pressure gage shows 60 psi
+15 psi or −15 ps i.
(6) Do an inspection for leaks of the pressurized fl uid lines and connections in the airplane.
(7) If there are leaks, you m us t put the FLUID CONTROL PRIMA RY s witch in the OFF position,
release the pressure in t he lines, and repair the leaks bef ore you cont inue with this test.
(8) Close the empennage shutoff val ve.
(9) When the p ressure ga ge shows more than 150 psi, put the FLUID CONTROL PRI MARY
switch to the OFF position.
(10) Make su re that the amber A -ICE HI GH comes on.
(11) Once agai n, do an inspection for leaks of the press urized fl uid lines and connect ions in the
airplane. If there are leaks, y ou must release th e pressure in the lines and repair the leaks
before you continue wi th this test.
(12) Slowly open all of th e test tube shu toff valves to release the fluid pressure.
(13) Put t he EXTERNAL P OWER s witc h to the OFF position.
(14) Disconne ct all of the fi ve test tube assemblies.
(15) Install new sealing rings and seal s (t hree 101-013-8810 Seals at th e proportioning units, one
S2800-942 Sealing Ring a t t he propeller s upply line, and one S 2800-943 Sealing R ing at the
windshield supply line) and connect the fi v e fluid supply lines to t heir correct connections on
the proportioni ng units and engine firewa ll.
CAUTION: Before you begin t he pane l purge, you must make sure that the fay seal cures for 7 2 hours
and you must make sure that the fillet seal is no longer tacky.
30. Do the panel p urge and complete system functiona l test as follows:
A. Put a label on each wing t ube asse mbl y to m ak e s ure t hat you attac h it to the correct related
proportioning tube port after you c omplete the f unc tional test. R efe r to Ta ble 3.
SK208-179B
Page 38 February 7, 2013
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