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
4-19
Function check
a) Watertight with valve closed.
b) Check proper timing of opening of the fin ballast dump valve according
to section 4.4.1 item (3) LS8 resp. section 4.4.2.2 item (11) LS8-a and
LS8-18..
c) Tightness during filling (back to front via funnel). With valve open,
water level in filling tube must remain constant.
4.6 Removal and installation of wing water ballast bags only LS8
Wing water bags are kept in straight position by nylon rope, running from the
bag end over a pulley to the root rib, tension approx. 10 kg <45 lbs>.
Removal
(1)
using water valve key part. No.
4F05-82
(standard equipment), disconnect
screwed joint of valve and release tube from wing under side through
release outlet
(2)
open knot at rope end and connect approx. 15 m <49 ft> of braided nylon
rope (ends heat sealed) by stitching for about 50 mm <2 in>.
Do not
connect by knot, this will not pass through pulley
guide.
Caution: if water bags are taken out of wings without additional rope, the wing
shell must be cut open near the pulley to reinstall the rope!
(3)
pull valve and bag through opening in root rib, disconnect rope from bag.
Warning
:
The tube between double valve and outer bag is prone to collapse,
therefore disassemble and assemble with two persons!
Assembly
(1)
pull bicycle type inner tube over valve end, 60 mm <2.4 in> long.
(2)
adjust ballast bag with seam to leading edge and with valve as shown
below (different valve position increases discharge time considerably).
(3)
push bag on valve stub, cover bag on stub with 1 layer of tape (example
Tesaflex 4163) to protect bag against damage by hose clamps. Turn both
seams during taping in the same circumferential direction, otherwise there
will also be a considerable increase in discharge time.
(4)
tighten hose clamps and check for water tightness before installation into
wing.
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