Instruction Manual

Instructions for Continued Airworthiness 190-00792-12 Rev 1

for the Garmin G500H Installation in Eurocopter AS350 Page 37 of 80

(8) Rinse with demineralized water.

b) Paint Removal, Mechanical

Caution: Do not sand into or expose composite fibers. Do not remove more material

than necessary. Do not use aluminum oxide abrasive materials on epoxy/graphite

materials.

Use abrasive flap wheel, abrasive disk, abrasive paper, or plastic media blast to remove

paint.

c) Corrosion Removal

Note: Aircraft shall be electrically grounded during corrosion removal operations.

When removing exterior corrosion from electronic boxes, the unit case shall be

electrically grounded during the complete operation.

(1) Corrosion shall be removed by the mildest method possible.

(a) Hand scrub with dry non-metallic brush/pad. (3M scotchbrite 63

cellulose/nylon scouring pad).

(b) Use abrasive cloth. (Aluminum oxide 240 grit). Caution: Do not use on

epoxy/graphite materials.

(d) Glass bead blast.

(e) Use 240 grit abrasive wheel.

Note: On high strength steel, do not use power tools other than a flap brush or

mandrel with abrasive mat; overheating and notching may occur.

(2) Ensure all active corrosion and corrosion products have been removed.

(3) Using 320 grit sandpaper blend edges of paint (if applicable) surrounding repair

area to create a smooth transition. Vacuum area thoroughly to remove all

contaminates.

(4) Apply aluminum surface treatment if applicable. (Ref. Item 4. Below).

(5) Touch-up primer and paint to match original

3. Mechanical Defects (Nicks, Scratches, Gouges, Etc.)

a) Determine if damage is through the paint. If not touch-up the paint (Ref. Section 20-30-

00,).

20-40-00