Textron Cessna 208B - Accomplishment Instructions; Preparation for Maintenance

CAB-30-02
Page 10 May 17, 2013
Caravan SERVICE BULLETIN
CAB-30-02
(11) Cont inue the fluid purge until the panel is correctly purged in acc ordanc e with Figure 3 and
Table 2.
TABLE 2: PANEL PURGE FLOW TROUBLESHOOTING - WORK THROUGH TABLE A S N ECESSARY
UNTIL T HERE ARE CORRECT F LO W CHARACTERISTICS
Is there enough fluid in the test cart? Add flu id to t he test cart as necessary
Wipe leading edge with pa per towel to even out the
fluid flow
If flow still unev en, use an approv ed proce dure to
clean the dry spots
Are there correc t flow charact eristics for the porous
panel? If no,
Do the panel purge again
Does th e fluid leave the test cart c orrec tly? If no,
Repair or replace the test cart as ne ce ssary
Are there kinks or objects in the tubing tha t block the
flow? If yes,
Replace the t ubing as necess ary
Do a wate r panel purge as follows:
1. Attach a water line to the water inlet port
and a shop air line to the air inlet port on the
purge cart
2. Connec t the purge tank lines t o the panel
you will purge
3. Turn the selector lever to the WATER pos ition
on the purge c art
4. Turn th e water valve counterclockwise until
the pressure gauge s hows 50 ps i
5. After water begins to flow from the panel, let
the w ate r flow for 30 minutes
6. Turn the purge cart selector lev er to AIR
7. Adjust the air pressure to 15 psi
8. Purge t he entire system with the air for 10 t o
15 m inutes t o dry out the panels
Are there correc t flow charact eristics for the porous
panel? If still n o,
Do the panel purge of t he porous panel with the TKS
fluid again
Are there correc t flow charact eristics for the porous
panel? If still n o,
Replace the porous panel
NOTE: To get an even flow over the panel it may be necessary to lightly run a dry cloth or
paper t owel over the leading edge and/or the dry spots of the pan el during purg ing.
(12) Make sure that there is no leakage at th e tube connections and around the perimeter o f t he
panel.
(13) Stop the fluid supply.
(14) Wait until the fluid pressure is releas ed.
(15) Slowly disconnect t he test cart fluid supply t ube from the lef t inboard w ing porous panel.
(16) Install new sealing rin gs (t wo S2800-942 Sealing Rin gs ) and connect the two left inboard wing
panel suppl y lines to ports 1 and 5 on the wing proportioning unit.
(17) Disconne ct the c enter TKS panel su pply line from port 2 on t he wing proportioning unit.