Maintenance of Protective Covers. Cleaning,
repair, waterproofing, and storage of protective covers are
explained in the following paragraphs.
Cleaning. Protective covers contaminated
with salts from the atmosphere, specifically chlorides (in
marine areas) and sulphur compounds (in industrial
areas), can promote corrosion of aircraft skins. Grease,
oil, or dirt can mar or discolor plexiglas portions of the
aircraft Therefore, only clean covers will be used. Clean
protective covers using the following procedures.
To increase life expectancy, protect
covers against rain, wind, snow, sand,
and mildew when not Installed on
wooden attaching parts.
Tape or wrap all attaching parts, such
as buckles, snaps, hooks, and D-rings to prevent tearing
and snagging of covers during soaking or washing.
Brush soiled section with firm bristle
brush to remove excessive soil.
Select a container that will hold
enough liquid to allow complete immersion of cover to be
Synthetic detergents are permissible when available.
The temperature of water should not
exceed 100°F (37°C)
Immerse one cover at a time in soap
solution for a period not to exceed 30 minutes.
Rinse over In clean water until all
soap has disappeared.
Spread covers on a clean surface to
Repair. Make prompt repairs to aircraft
protective covers to prolong service life. Inspect for
damage immediately after use and make repairs using
the following paragraphs.
Puncture, snagged, or torn areas.
Repair punctured, snagged or torn areas as follows:
1 Repair punctured, snagged, or
torn areas by sewing in place a patch of material equal to
basic material in weight, quality, and color.
2 Reinforce and darn punctures
and small holes (1/2 Inch or less).
3 Trim and turn under frayed
edges to make a neat and durable repair.
4 Use circular patches on small
holes and rectangular patches on larger holes, irregular
snags, or tears.
5 Mend a cluster of holes with
one suitable patch, after first removing damaged area and
turning under all edges.
6 Provide best possible water
drainage by extending patch seams diagonally from
centerline of cover section whenever possible.
7 Do not extend patches over
more than one section of cover (seam to seam).
8 Restitch all open seams. Stitch
pattern and type thread will follow as near as possible the
type stitch and thread used in original construction of item
Edge damage. Repair edge damage
1 Repair damaged areas along
edge of covers where grommets or attaching points are
located by folding a piece of material equal to the basic
material over damaged area by sewing In place.
2 Replace corner areas where
attaching points are located by sewing on a patch
composed of three thicknesses of material equal to basic
3 Replace any worn or missing