accumulator. A reservoir, located just inboard of the
left nacelle and forward of the main spar, has a lid with
a dipstick attached marked FLUID TEMP 0 °F, 50 ° F,
l00 ° F. Add MIL-H-5606 hydraulic fluid (consumable
materials list) as required to fill the system, corrected
2-93. INFLATING TIRES.
Inflate nose wheel tires to a pressure between
55 and 60 psi. Inflate main wheel tires to a pressure
between 94 and 98 psi for standard tires or 60 and 64
psi for high flotation tires.
The toilet should be serviced during routine
ground maintenance of the aircraft following every
usage. The waste storage container should be
removed, emptied, its disposable plastic liner replaced,
and the container replaced in the toilet cabinet. Toilet
paper, waste container plastic liners, and dry chemical
deodorant packets should also be re-supplied within
the toilet cabinet as needed.
Servicing the air conditioning system consists of
checking and maintaining the correct refrigerant level,
compressor oil level, belt tension and condition,
system leak detection, and replacement of the
evaporator air filters. It is imperative that only qualified
maintenance of the air conditioning system, except for
2-96. ANTI-ICING, DEICING, AND DEFROSTING
surfaces if snow is expected. Melting
snow will dilute the defrosting fluid and
form a slush mixture that will freeze in
place and become difficult to remove.
Use undiluted anti-icing, deicing, and defrosting
(MIL-A -8243) to treat aircraft surfaces for
protection against freezing rain and frost. Spray
aircraft surface sufficiently to wet area, but without
excessive drainage. A fine spray is recommended to
Use diluted, hot fluid as follows to remove ice
1. Remove frost or ice accumulations from
aircraft surfaces by spraying with diluted
anti-icing, deicing, and defrosting fluid
mixed in accordance with Table 2-18.
2. Spray diluted, hot fluid in a solid stream
Thoroughly saturate aircraft surface and
remove loose ice. Keep a sufficient
quantity of diluted, hot fluid on aircraft
surface coated with ice, to prevent liquid
layer from freezing. Diluted, hot fluid
should be sprayed at a high pressure, but
not exceeding 300 psi.
available and it is deemed necessary to
remove ice accumulations from aircraft
surfaces, undiluted defrosting fluid may be
used. Spray undiluted defrosting fluid at
15-minute intervals to assure complete
coverage. Removal of ice accumulations
expensive and slow.
If tires are frozen to ground, use undiluted
defrosting fluid to melt ice around tire. Move aircraft
as soon as tires are free.
2-97. APPLICATION OF EXTERNAL POWER.
Before connecting the power cables from
the external power source to the aircraft,
ensure that the GPU is not touching the
aircraft at any point. Due to the voltage
drop in the cables, the two ground systems
will be of different potentials. Should they
operating, arcing could occur. Turn off all
external power while connecting the power
cable to, or removing it from, the external
power supply receptacle. Be certain that
polarity of the external power source is the
same as that of the aircraft before it is
connected. Minimum GPU requirements
are: 300-amperes, 28 Vdc continuous
An external power source is often needed to
supply the electric current required to properly ground
service the aircraft electrical equipment and to
facilitate starting the aircraft's engines. An external dc
power receptacle is installed on the underside of the
right wing, just outboard of the engine nacelle.