AIRPLANE
OPERATIONS
MANUAL
GROUND SERVICING
REVISION 38
1-12-20
Page
9
Code
01
AOM-145/1114
- Vertical Stabilizer and Rudder: Apply the fluid at a low, side angle
(see figure), to prevent fluid spills into the APU. The rudder should
be in the neutral position. Application on the rudder surface can
also cause the fluid to be ingested by the APU. For the vertical
surfaces the application should start at the top and then work down.
SPRAYING ON THE VERTICAL STABILIZER AND RUDDER
− Fuselage – Remove all snow accumulated on the nose to avoid
snow blowing back during takeoff and restricting pilot’s visibility.
Fluid should be sprayed along the top centerline of the fuselage
and then outboard, letting the fluid cascade down and across the
windows. Fluid must not be sprayed directly onto windows and
window seals, doors and doors seals, air conditioning scoops or
NACA air inlets. A thin layer of hoar frost on the fuselage is
permitted, but only to the point you can still see the airplane
markings. Check the APU air inlet and surrounding area to ensure
that it is clear of ice or snow prior to APU starting. Fluid applied
close to inlet area may be ingested and cause flameout and result
in APU internal parts damage.
Landing gear and wheel bays – application of fluid in this area must be
kept to a minimum. Do not allow water or fluid mixture spray on
wheels and brakes to avoid damage to carbon brakes. For this part
of the airplane, it is preferable to clear snow or slush using a brush.
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