CHAPTER 20
PAGE 16
MAINTENANCE MANUAL EXTRA 300/SC
PAGE DATE: 1. August 2014
• a gradual or sudden increase in the no-load (cable free and
unattached) friction of a control cable has been detected.
Correct routing of the control cable whenever:
• misalignment, unacceptable high internal friction due to
bends below minimum radius of 6" or malfunction of slid-
ing elements has been detected.
• the usable stroke is not centered within the available travel.
• the swivel angle is not centered within the available angle.
20-10-10 PR-812
Application
Also refer to PR-812 Technical Data Sheet available from
PGG Aerospace.
I M P O R T A N T Proper mixing and correct proportions are extremely
important to obtain required results.
1 Prepare PR-812 firewall sealant by mixing brown part A with
black part B with weight ratio 2.5:100.
2 Clean the surfaces to be sealed with solvents.
3 Immediately thereafter, dry these areas with a new dry cloth.
4 Seal the gap between the firewall and the respective com-
ponent with PR-812 firewall sealant. Minimum sealant
thickness on firewall side is 3 mm (1/8 inch).
Cure time @ 25°C (77°F), 50% RH for a fillet 3 mm
(1/8 inch) thick:
• tack free: approx. 24 hours
• to tough rubber: approx. 72 hours
• to performance properties: approx. 14 days
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