Maintenance Manual LS8
Issued: December 2009
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
Manual valid with the up-to-date cover page only
3-3
9. Perform Annual Inspection according to checklist in Appendix,
The annual inspection checklist contains items (aileron lateral bearing
play, aileron vent holes), which may only be checked after removing
seals. Unless changes are suspected (for instance lateral control surface
gaps differing from design values, see also section 4.1.1 installation of
ailerons item 9 and 10), it is illogical to remove (destroy) seals just for
inspection purpose. Existence of washer at fixed bearings can be checked
after lifting seals lids cautiously.
10. Inspection of the water ballast system
LS8:
Inspect water ballast bags and vertical tail fin tank for function and
tightness. Wire meshing at tail fin tank upper end ventilation orifice and
in filling funnel are mandatory to establish proper function of vertical
tail fin valve.
Check wing water system for proper filling.
Leaking
components must be removed and repaired. Check existence of
tail
tank filling hose (Minimum Equipment)!
Tail fin tank discharge time for tank filled with 5.2 Liter: maximum
90 seconds.
LS8-a, LS8-b, LS8-18:
Check the following items of the water ballast system:
(a) Wing and vertical tail fin water tanks for external tightness.
(b) Wing tanks and
12 L / 7,5 L
tail fin tank for leaks into structure
(irregular surface mirror finish visible).
(c) Ventilation and drain tubes for free passage see section 4.4.2 for
LS8-a, LS8-b, LS8-18
.
(d) Existence of tail fin tank filling markings under translucent rudder
seals.
(e) Wire meshing in filling funnel is mandatory to establish proper
function of vertical tail fin valve. Tail tank leaks must be repaired
(the slide-in tank may be removed for repair).
Check existence of
tail
tank filling hose adapter (Minimum Equipment)!
(f) Tail fin tank discharge time for tank filled with 7.5 Liter: maximum
90 seconds.
11. Outside air temperature gauge: Check for correct indication e-g- by
comparing with another thermometer.
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