CHAPTER 51
PAGE 28
PAGE DATE: 7. July 2010
MAINTENANCE MANUAL EXTRA 300LT
to the layer sequence plan. Ensure correct style and direc-
tion of fabric.
Figure 8 Damage of Complete Sandwich
Lay out the required number and size of fabric pieces on a
piece of plastic foil and wet them with resin mixture.
Subsequently, position them on the repair area.
I M P O R T A N T Remove the plastic foil after each positioning process.
The repair area has to be cured under condition of vacuum
bagging. Proceed as follows:
1 Apply peel nylon fabric on the last repair fabric layer.
2 Perforate a clean, thin plastic foil with a thick needle
(max. spacing of holes: 20mm x 20mm) - mainly in the
area of the honeycomb - and lay it on the repair area.
3 Lay a jute cloth or equivalent bleeder cloth on this
perforated plastic foil.
4 Lay a second plastic foil uppon the jute weave and seal
their edges to the surrounding surface using an adhesive
tape.
5 Apply suction with a vacuum pump (pressure approx.
0.7bar / 10psi).
6 Apply the thermal curing cycle.
7 Following the curing cycle carefully remove vacuum
bagging material and peel nylon fabric.
N O T E After the pre-curing period at room temperature, the
repaired area has to be cured according the tempera-
ture cycle as shown on Figure 6.
After the curing process is completed, the repair area can be
sanded level to the surrounding area.
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