Extra 200 - Page 272

CHAPTER 51
PAGE 29
EXT
RA - FLUGZEUGBAU GmbH
SERVICE MANUAL EXTRA 200
PAGE DATE: 1. July 1996
- Perforate a clean, thin plastic foil with a coarse needle
(max. spacing of holes: 20mm x 20mm) - mainly in the
area of the honeycomb - and lay it on to the repair area.
- Lay a jute cloth or equivalent bleeder cloth on this
perforated plastic foil.
- Lay an air tight plastic foil upon the jute weave and seal
their edges to the surrounding surface using an adhesive
tape.
- Apply suction with a vacuum pump (pressure difference
approx. 0.7bar / 10psi)
- Curing cycle
- Following the curing cycle carefully remove vacuum
bagging material and peel nylon fabric.
After the pre-curing period at room temperature, the re-
paired area has to be cured according the temperature cycle
as shown on Figure 3.
After the curing process is completed, the repair area can be
sand level to the surrounding area.
C A U T I O N Sand only the edge thickness of repair laminate!
Refinish the surface according chapter: 51-10-09 Painting.
51-70-04 Repair of Spars
The spars consists of carbon roving caps, glass or carbon
fibre webs and PVC foam cores.
I M P O R T A N T The spars are highly stressed; a failure of this bonded
structure can result in loss of the aircraft! In all cases,
the repair of a spar must be considered as a large-scale
repair with a Damage Class 1 (Refer to Chapter 51-10-
01 Damage Classification"). EXTRA-FLUGZEUGBAU
GmbH has to be contacted prior to repair!
REP
AIRS
Repair of Laminates