Instruction Manual

Instructions for Continued Airworthiness 190-00792-12 Rev 1
for the Garmin G500H Installation in Eurocopter AS350 Page 36 of 80
Section 20-40-00 Corrosion Control Maintenance Practices
1. Corrosion Control
The G500H mounting components are fabricated primarily of aluminum. All components
should be inspected regularly for any signs of corrosion. The following procedures should be
used for removing corrosion and treating affected areas.
2. Corrosion Removal
Remove corrosion by either chemical or mechanical means.
a) Paint Removal, Chemical
Caution: Do not use chemical paint stripper on composite materials. Chemical paint
strippers can cause composite components to debond and / or loose adhesion of the
epoxy matrix.
(1) Mask all non-metallic surfaces in area to be stripped as well as areas where
solution may get entrapped.
Warning: Paint stripper can cause burns and irritation when it contacts skin; proper
gloves should be worn. Vapors are harmful and caustic to eyes; Goggles must be worn
for eye protection. Paint stripper is poisonous. Vapors are harmful to life or health; work
should be performed with proper ventilation and / or respirators should be worn while
working with paint stripper.
(2) Using a fiber brush, apply sufficient paint stripper, (Turco 5873), to cover area of
removal.
Note: If paint stripper evaporates quickly or works slowly, cover area with plastic sheet.
(3) Allow paint remover to remain on surface for a time sufficient to cause wrinkling
and lifting of paint (about 10-30 minutes).
(4) Using non-metallic scraper or abrasive pads, (3M scotchbrite 63), scrub area to
further loosen paint.
(5) Re-apply paint stripper, (Turco 5873), as necessary in areas where paint remains
tightly adherent.
(6) Wash and scrub surface with demineralized water and alkaline cleaner to
neutralize paint stripper.
(7) Remove masking materials and any residual paint or stripper
20-40-00