coolant must be maintained. You should ensure the dust
MAINTENANCE SAFETY PRECAUTIONS
caps, flushing jumpers, hoses, and bleed lines are
The Phoenix missile requires a completely
thoroughly cleaned with trichlorotrifluoroethane and
contaminant-free cooling system. Keeping the system
lint free cloth. The cleaned components should be air
clean requires the use of toxic fluids that must be used
dried before installation. Do not allow O-ring seals to
with special care. It is important to handle this system
soak in cleaning fluid before or after cleaning because
with the same care as you would handle an oxygen
this will cause hardening of the O-rings and premature
system. The following information is of special interest
failure.
and should be kept in mind when working on this
When adding coolant with the fluid make-up
system.
unit, add the coolant slowly. Rapid pumping may cause
If more than 1 gallon of coolant is required to fill
the pressure relief valves on the make-up and in the
the expansion tank, you should flush and refill the
aircraft to open.
system, using the liquid coolant service unit (LCSU).
Coolant spilled on the aircraft can damage the
For detailed LCSU operating procedures, you should
paint. Spillage should be wiped up immediately.
refer to the applicable MIM.
Spillage on a coaxial cable may cause the cable to come
The cooling system should only be serviced with
apart.
Flo-cool 180, Coolanol 25, or Coolanol 25-R. If you
To take a coolant sample, the coolant must have
use another type of coolant, you may damage the
been circulated for at least 5 minutes by the aircraft
missile components. It is a requirement that you wear a
powered pump. This circulation ensures that the sample
respirator or work in an area with forced ventilation
will be representative of coolant in the entire system.
while working with these coolants. Additionally, you
The sample should be taken from the AIM-54 supply
must wear chemical splash-proof goggles and gloves.
bleed port.
When you use trichlorotrifluoroethane,
Q5-41.
Describe the purpose of the missile liquid
MIL-C-81302, type I or II, to clean fittings and hoses,
cooling system.
exercise extreme caution. You must wear a respirator
Q5-42.
What is the purpose of the missile hot air
and chemical splash-proof goggles and gloves.
modulating valve?
The task should be performed in an area with
forced ventilation. Smoking is prohibited in the
Q5-43.
The coolant pump circulates what amount of
area where the chemical is being handled. Keep
coolant per minute?
trichlorotrifluoroethane from coming in contact with
Q5-44.
What type of protective measures must you
your skin, eyes, and clothes. Do not breathe the toxic
take when servicing the missile liquid cooling
vapors.
system?
To prevent contamination of the temperature
Q5-45.
Prior to taking a coolant sample, the coolant
control system and possible damage to its components,
must have circulated for what amount of time?
absolute cleanliness of your equipment, work area, and
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