4-39. WINDOWS.
4-40. REMOVAL OF WINDOWS. (Refer to Figure 4-6.)
a.
Remove all the screws around the perimeter of window to be removed except door window.
b.
To remove rear windows, press inward at the back of the window to break seal then pull aft.
c.
To remove the overhead windows, remove retainer strip and push upward from inside.
e.
To remove door windows, remove all the screws along the top, front and rear of the window and
loosen the bottom row of screws just enough to free the window.
f.
Remove outside door handle, at top of door, by pushing out roll pin with a punch.
g. Remove window by holding aluminum skin outward at top of door and pull the window up and out
the top of the door.
4-41. INSTALLATION OF WINDOWS. (Refer to Figure 4-6.)
a.
To install rear windows, apply a suitable adhesive sealant (GE RTV-102 or equivalent) around the
inside of the window opening; then place window in proper location, align and install attaching
hardware and tighten evenly. Remove excess sealer carefully to avoid smearing.
b.
To install overhead windows, apply a suitable adhesive sealant (GE RTV-102 or equivalent) around
recessed area that the window lays in; then install window, align, and place the retainer strip over
the window. Align the holes and install the attaching hardware and tighten evenly. Remove excess
sealant.
c.
To install the side windows, install 1 1/2 inch wide foam tape around entire edge of window; then
locate window in proper position between door frame and door skin and install attaching
hardware, and tighten all screws around perimeter of window evenly. Install door handle on shaft,
align holes and install roll pin.
4-42. REPAIR OF WINDOWS. Window panels that are extensively damaged should be replaced. However,
certain repairs may be made successfully without removing the window from the aircraft. There are three types
of temporary repairs that may be used for cracked plastics. Curved areas are more difficult to repair than flat
areas, and repair should not be attempted where it would be likely to affect the pilot’s field of vision. Any
repaired area is both structurally and optically inferior to the original surface.
4-43.
SCRATCHES. Scratches on the surface of a window may be removed by hand sanding followed by
buffing and polishing carefully. Proceed as follows:
a.
Using a piece of 320 or finer sandpaper or abrasive cloth wrapped around a wooden block, rub
lightly the area around the scratch with a circular motion, keeping the area constantly wet with
clean water to prevent further scratching and to wash away the waste. Work over a large enough
area to prevent formation of optical distortions.
b.
Continue sanding using progressively finer grade abrasives until scratches finally disappear; then
wash the area thoroughly with clean water to remove all grit. The entire sanded area will appear
cloudy.
c.
Apply fresh tallow or buffing compound to an electric buffer and move it constantly over the
damaged area until the cloudiness disappears. A 750 RPM polishing machine with a 10-inch
buffing wheel will apply the 2000 foot-per-minute surface speed recommended to prevent
overheating causing softening of the surface and distortion. Polishing may also be done by hand
but requires a considerable amount of time compared to a buffing wheel.
d. When buffing is completed, wash area thoroughly and dry with a soft flannel cloth. Inspect area to
determine if full transparency has been restored. Apply a thin coat of hard wax and polish surface
lightly with a clean flannel cloth.
Issued: 2/14/73
1E13
PAWNEE BRAVE SERVICE MANUAL
STRUCTURES
Summary of Contents for Pawnee Brave
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