Maintenance Manual LS4
Issued: May 2011
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
Manual valid with the up-to-date cover page only
4.1.1.2 Installation of ailerons
- LS4-b, LS4 and LS4-a optionally: Install internal lower side seal
according to section 4.2.1.
Note: If the aileron upper side is sealed according to section 4.2.2.1 or 4.2.2.2 an
internal lower side seal is not necessary and must not be reinstalled-
- Grease bearings according to lubrication schedule,
section 3.4.
- Make sure that washers, if present, are on inner side of bearings No. 2
- Match aileron pins with bearings with aileron deflected fully upwards,
using two people. Do not use force.
- Set up washers at at laterally fixed hinge as found during disassembly.
- Tighten nut (6 mm thread, LN9348, width over flats 10 mm) at laterally
fixed hinge with maximum torque of 6,4 Nm (4.7 ft lbs).
Check lateral clearance:
bearing No. 1 2 3 4 5
play (mm) 0.5 fixed 0.5 1.0 1.5
<in> 0.02 0.02 0.04 0.06
- Check lateral aileron gaps:
at tip and root: min. 2mm (0.08 in)
Connect pushrods to ailerons using bolts, washers and nuts (6 mm thread,
LN9348, width over flats 10 mm). Maximum torque is 6,4 Nm (4.7 ft lbs).
- LS4-b, LS4 and LS4-a optionally: Bond internal seal on lower wing
surface over aileron gap with aileron deflected fully upwards, see section
4.2.1.
- Bond fillet at aileron tip recess with contact adhesive (e.g. Pattex)
- LS4 and LS4-a Reinstall sealing tape on upper side according to section
4.2.2
- LS4-b, LS4 and LS4-a optionally: Install new upper side seals if
necessary according to section 4.2.3.
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