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NOTE: An equivalent procedure can be used to repair damage in the area underside of the aircraft
flight compartment, aft of the engine. This area is a fixed part of the aircraft structure.
Detail Steps/Work Items Key Items
(1) Remove the cowling that requires repair. Refer to Chapter 71-10.
(2) Put the cowling on a satisfactory work stand
to permit clear access to the area that
requires repair.
Make sure that the outside of the cowling is
on a protective surface so that it will not be
damaged.
(3) Carefully examine the cowling and identify
the area(s) that require(s) repair.
At each step of the repair, complete all
areas of the cowling in need of repair for
that sequence.
(4) Make an estimate of the repair(s) required,
and then get the materials and safety
equipment satisfactory for the job.
For approved materials and suppliers
Refer to Ch 51-00.
WARNING: OBEY THE SAFETY PRECAUTIONS THAT FOLLOW WHEN YOU DO WORK
WITH COMPOSITE MATERIALS:
− DO THE WORK IN AN AREA THAT HAS A GOOD FLOW OF CLEAN AIR.
− USE APPROVED EYE, MOUTH, AND BODY PROTECTION. SMALL
PARTICLES CAN GO THROUGH USUAL CLOTHING.
− DO NOT LET THE MATERIALS TOUCH YOUR EYES, MOUTH, OR SKIN.
− IF IRRITATION OCCURS, GET MEDICAL AID IMMEDIATELY.
− OBEY THE MANUFACTURER’S INSTRUCTIONS.
− DO NOT USE CHEMICAL PAINT REMOVERS. TO REMOVE PAINT FROM
COMPOSITES THAT HAVE RESIN, USE ABRASIVE MATERIALS.
− DO NOT USE POWER TOOLS TO MAKE A SURFACE ROUGH.
YOU CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT
IF THESE SAFETY PRECAUTIONS ARE NOT OBEYED.
(5) Prepare the area(s) of the cowling for the
application of the high temperature paint, as
follows:
- If dirt or grease is present, wash the area
with clean carbon tetrachloride or
acetone. Wipe the area off immediately
- Abrade the surface with 280 grit
sandpaper
- Remove the dust with a fully opened tack
cloth
- Cover the area(s) of the cowling that will
not be painted. Use masking tape to hold
the cover(s) in place.
For approved materials and suppliers
Refer to Ch 51-00.
Make sure that you do not damage the
laminate. Only remove the transparent top
coat and the fire resistant paint.
DA20-C1 AMM
Power Plant
Doc # DA201-C1
Rev. 14 71-10-00 Page 203
30 Oct 2008
Detail Steps/Work Items Key Items
WARNING: OBEY THE SAFETY PRECAUTIONS THAT FOLLOW WHEN YOU USE PAINTS:
− USE SAFETY GOGGLES.
− USE SAFETY CLOTHING.
− DO NOT LET PAINTS TOUCH YOUR SKIN, EYES, OR MOUTH.
PAINTS ARE POISONOUS.
− IF IRRITATION OCCURS, GET MEDICAL AID.
− DO THE WORK IN AN AREA THAT HAS A GOOD FLOW OF AIR.
− DO THE WORK IN AN AREA THAT DOES NOT HAVE SPARKS, FLAME, OR
HOT SURFACES.
− OBEY THE MANUFACTURER’S INSTRUCTIONS.
− THE TEMPERATURE MUST BE BETWEEN 65 AND 120 DEGREES F
(18 AND 49 DEGREES C).
− THE RELATIVE HUMIDITY MUST BE BETWEEN 25 AND 80 PERCENT.
YOU CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT
IF THESE SAFETY PRECAUTIONS ARE NOT OBEYED.
(6) Apply the first coat of fire resistant paint with
a splatter spray gun, a brush or a roller to a
minimum thickness of 250 microns (.010 in.)
For approved materials and suppliers
Refer to Ch 51-00.
Make sure that the painting is done in a
dust free area.
(7) Let the fire resistant paint dry, in a dust free
area, for a minimum of four hours.
The following drying times refer to a normal
climate of 23ºC and 50% humidity:
- Dust-free - after 2 hours minimum
- Maskable - after 8 hours minimum
- Recoatable - after 4 hours minimum
(no maximum)
- Transparent Top Coat Application
- after 24 hours minimum
- Transportable - after 8 hours minimum
- Full Cure - after 7 days.
(8) Remove any dust that has collected with a
fully opened tack cloth.
(9) After a minimum of four hours, apply the
second coat of fire resistant paint with a
splatter spray gun, a brush or a roller to a
minimum thickness of 250 microns (.010 in.)
Make sure that the painting is done in a
dust free area.
(10) Let the fire resistant paint dry, in a dust free
area, for a minimum of 24 hours.
(11) Before the transparent top coat is applied,
remove any dust that has collected with a
fully opened tack cloth.
Power Plant
DA20-C1 AMM
Page 204
30 Oct 2008 71-10-00 Doc # DA201-C1
Rev. 14
Detail Steps/Work Items Key Items
(12) Apply the first coat of transparent top coat
with a high pressure sprayer. The first
　
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