SECTION 17.
SAILPLANE REPAIRS
TECHNICAL SERVICE MANUAL
SZD-54-2
„Perkoz”
page 17.10
Allstar PZL Glider Sp. z o.o.
Doc No. 542.4.02
Issue II
April 2014
Revision No. 2
May 2017
corrected
17.3. Typical composite structures repairs
All repairs of composite parts should be performed in accordance with flow
charts shown below and also with respect to:
use of materials specified and further described in items from 17.3.1. to 17.3.6.
inclusive,
preparation of surfaces before laminating or gluing by degreasing, grinding with
sandpaper (grit size - approx. 180) and dust removal,
materials protection from grease, dirt and moisture,
proper and adequate dosage of hardener,
working life of mixed composition (composition L-285/H286 in room temperature -
approx. 70 min.),
composition hardening time that is minimum 10 hours in temperature ≥ 66 °F,
composition extra hardening time in higher temperature (for L-285/H286
composition
– minimum 15 hours in temperature 131 °F).
17.3.1.
Sandwich shell laminate-foam-laminate
17.3.1.1.
Damage to the sandwich outer layer
(shallow dent, loss)
Fig. 17-7. Damage to the sandwich outer layer
Fig. 17-8. Repair of damaged sandwich outer layer
2
