SERVICE KIT
SK 208-179B
TABLE 3: TKS PANEL / RELATED PROPORT IONING UNIT PORT
TKS Panels
Proportioning Unit Port
Left Inb oard Wing Panel
1, 5
Left Mid Wing Panel 2
Left Out board Wing Panel 3, 4
Left Wing Strut Panel 6, 7
Right Inboard W ing Panel 1, 5
Right Outb oard Wing Panel
3, 4
Right Wing S t rut Panel 6, 7
Right Mid Wing Panel 2
B. Purge the panels as follows:
NOTE: It is not necessary to u se electrical power for the purge of the panels.
(1) Remove the P840294 Protective Tape from the surface of the porous panels.
(2) (Refer to Figure 13.) In Figure 13, look for examples of fl uid flow through the porous panels
that is sufficient and of fluid flo w that is not sufficient. You m us t know how to tell if flui d flow
through t he porous pa nels is sufficient bef ore you accomplish this panel purge operation. If
you need help to know how to t ell if a panel is purged correctly, contact Cess na C us tomer
Service at 316-517-5800.
WARNING: During thi s test the TKS system operation pressure will be as high as 75 p sig.
(3) Attach the fluid collector system (plastic gut te ring) below the area of th e panels.
(4) Fill the TKS system test cart reservoir wi th approximately 5.50 gallons (20.8 2 liters) of TKS
fluid and attach t he cart to an air sourc e. Do not fill the res erv oir until it is full.
NOTE: You will fill the r es ervo ir more than once as you do th is procedure.
(5) Follow t he operat ion and safety instructions that are supplied with the t es t cart, f ound in the
"Panels Installed on Aircr af t TKS Panel Test secti on of the TKS Ic e Protection Panel F low
Check Procedure Using TKS System Tes t Cart" publication.
(6) Disconnect the two left inb oard wing porous panel supply lines from ports 1 and 5 of the
wing proportioni ng unit.
NOTE: The inboard and out board wing panels hav e t wo s upply tubes. It is neces s ary to
disconnect the s ec ond tube and put a ca p or plug in the tube end to keep sufficient
pressure in the panel.
(7) Connect the test cart supply tube to the l eft inboard wing porous panel as near to the panel as
you can.
(8) Apply pres s ure of 10 psi, do a check for leaks in t he line, and repa ir all leaks.
(9) Apply pres s ure of 20 psi to slowly start the fluid flow t hrough the pane l.
(10) Wa it until the fluid s tarts to come o ut all the holes at the same rate along the f ull length of the
panel and increase the pressure to 65 psi.
(11) (Refer to Figure 13.) Continue the fluid purge until t he panel is correct ly purged in accordance
with Figure 13 and Table 4.
SK208-179B
February 7, 2013 Page 39
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