CAB-30-02
Page 14
May 17, 2013
Caravan
SERVICE BULLETIN
CAB-30-02
(86) Connect the purge tank line to the section of the wing strut TKS panel that supplies fluid by
the line that was attached to port 6.
NOTE: The strut panel has two membranes (upper and lower). Each membrane has a fluid
supply tube. You can install a tee fitting and connect the test cart supply tube to
each membrane.
(87) Apply pressure of 10 psi, do a check for leaks in the line, and repair all leaks.
(88) Apply pressure of 20 psi to slowly start the fluid flow through the panel.
(89) Wait until the fluid starts to come out all the holes at the same rate along the full length of the
panel and increase the pressure to 70 psi.
(90) Continue the fluid purge until the panel is correctly purged in accordance with Figure 3 and
Table 2.
NOTE: To get an even flow over the panel it may be necessary to lightly run a dry cloth or
paper towel over the leading edge and/or the dry spots of the panel during purging.
(91) Stop the fluid supply.
(92) Wait until the fluid pressure is released.
(93) Disconnect the purge tank lines.
(94) Connect the purge tank line to the section of the wing strut TKS panel that supplies fluid by
the line that was attached to port 7.
NOTE: The strut panel has two membranes (upper and lower). Each membrane has a fluid
supply tube. You can install a tee fitting and connect the test cart supply tube to
each membrane.
(95) Apply pressure of 10 psi, do a check for leaks in the line, and repair all leaks.
(96) Apply pressure of 20 psi to slowly start the fluid flow through the panel.
(97) Wait until the fluid starts to come out all the holes at the same rate along the full length of the
panel and increase the pressure to 75 psi.
(98) Continue the fluid purge until the panel is correctly purged in accordance with Figure 3 and
Table 2.
NOTE: To get an even flow over the panel it may be necessary to lightly run a dry cloth or
paper towel over the leading edge and/or the dry spots of the panel during purging.
(99) Stop the fluid supply.
(100)Wait until the fluid pressure is released.
(101)Disconnect the purge tank lines.
(102)Install new sealing rings (one S2800-942 Sealing Ring at port 6 and one S2800-943 Sealing
Ring at port 7) and connect the wing strut TKS supply lines to ports 6 and 7 on the wing
proportioning unit.
(103)Disconnect the left horizontal stabilizer TKS panel supply line from the tailcone proportioning
unit.
NOTE: The empennage proportioning unit is part of the tail bracket assembly on the floor of
the tailcone forward of the tailcone access panel.
(104)Connect the purge tank lines to the left horizontal stabilizer TKS panel as near to the panel as
you can.
(105)Apply pressure of 10 psi, do a check for leaks in the line, and repair all leaks.
(106)Apply pressure of 20 psi to slowly start the fluid flow through the panel.