Diamond DA 42 NG, Maintenance Manual

Page: 1645 / 2339

AIRCRAFT
DA 42 NG AMM
Standard
Practices/Structures
Doc # 7.02.15
Rev. 4
51-20-00
Page 209
15 Mar 2018
B. Curing with RIM 935 %
%
%
Detail Steps/Work Items % Key Items/References %
(1)
%
Establish and maintain a temperature of the
%
repair area of 40 to 55 °C (104 to 131 °F) for at
%
least 10 hours to pre-cure the repair.
%
If you do not have an oven or a warming
%
room you can make a temporary
%
enclosure around the repair to trap the
%
heat from a flame proof air heater.
%
CAUTION: DO NOT ALLOW THE TEMPERATURE TO GET TOO HIGH DURING
%
THE CURE. A TEMPERATURE THAT IS TOO HIGH CAN DAMAGE
%
THE COMPOSITE STRUCTURE.
%
%
(2)
%
Gradually raise the temperature of the repair
%
area to 125 to 135 °C (257 to 275 °F) over a
%
minimum of 4 hours.
%
%
(3)
%
Maintain this temperature for a minimum of
%
14 hours to complete the final post-cure.
%
Monitor the temperature every
%
15 minutes for the first hour then hourly.
%
The post cure time can be divided into
%
sections but you must make sure that
%
the repair has a minimum total of
%
14 hours at post cure temperature.
%
(4)
%
After min. 14 hours lower the temperature to
%
room temperature over a minimum of 4 hours.
%
%
CAUTION: DO NOT HEAT UP ABOVE 135 °C (275 °F). OTHERWISE THE FOAM
%
CORE MIGHT BE DESTROYED.
%
%