Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
Page
6
Page date:
Chapter 28
25.09.2018
28-10-03 Wing Tanks
Two integral wing tanks are in front of the main spar between the root rib and the third
outboard rib of the wing. The wing tanks are sealed with a sealant, refer to chapter 51-30-
06. Vent lines connect the wing tanks to the acro tank.
You can examine the wing tanks from the internal side through inspection panels in the front
root ribs of the wing. The outlet hoses and ventilation lines are attached to fittings on the
inspection panel.
To remove the inspection panel of the wing tank:
1
Drain the applicable wing tank, refer to chapter 12-10-03.
2
Make sure that the fuel vapors are fully removed.
3
Remove the foot rest to get access to the wing tank inspection panel.
4
Disconnect the fuel line and the ventilation line from the inspection panel.
5
Remove the bolts (AN3) from the inspection panel.
6
Remove the inspection panel from the root rib of the wing.
7
Disconnect the ventilation line from the tank side of the inspection panel. This is not
applicable for aircraft with serial numbers 01 thru 07 and 101 thru 133 (no
accomplishment of SB-2014-004).
8
Remove the inspection panel.
Be careful with flammable cleaning agents, such as acetone. Make sure that there is a good
airflow in the work area and that safety equipment is available. If you do not obey these
precautions, accidents can occur.
9
Before you assemble the inspection panel again, clean the sealing surfaces
mechanically and with acetone. Replace damaged sealing surfaces.
10
Assemble the inspection panel of the wing tank in the opposite sequence. Apply
“Epple 33” sealant to the sealing surface.
11
Do a fuel leak check.
28-10-04 Ventilation Lines
All ventilation lines are plastic hoses and resistant to fuel. The ventilation lines are connected
through fittings. The ventilation system connects the wing tanks to the acro tank. The
system is ventilated to the environment with a hose that connects the acro tank to the left
fairing of the main landing gear.
After you disconnected a ventilation hose, examine the ends of the hose for damage.
Replace damaged hoses. This is necessary to connect them correctly to the fittings.
WARNING
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