TO 00-25-172 - Robins Air Force Base
TO 00-25-172 - Robins Air Force Base
TO 00-25-172 - Robins Air Force Base
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<strong>TO</strong> <strong>00</strong>-<strong>25</strong>-<strong>172</strong><br />
the LIN is slightly bluish, it is to be considered contaminated<br />
with oxygen. In this case, the LIN shall require<br />
the same handling procedures as LOX.<br />
may overcome sensory recognition, the odor cannot be relied<br />
upon as an indication or warning of overexposure.<br />
Drops or splashes of LIN will freeze skin tissue.<br />
NOTE<br />
Do not attempt to rewarm parts of the body that<br />
have been frozen by contact with liquid nitrogen.<br />
Prevent further injury to the frozen area. Transport<br />
immediately to the emergency room of the nearest<br />
medical facility.<br />
d. When LIN is being transferred from one container to<br />
another, the receiving vessel shall be filled as slowly<br />
as possible to minimize the thermal shock that occurs<br />
when any material is quickly cooled.<br />
e. When moving the LIN servicing unit, all valves, except<br />
vent valves shall be closed and shall not be opened<br />
until the unit is in the working area.<br />
f. LIN servicing units shall be positioned to prevent accidental<br />
damage to the aircraft or equipment.<br />
g. LIN servicing equipment shall not be left unattended<br />
after hook-up.<br />
h. Should a control valve become clogged with ice, thaw<br />
with water.<br />
i. Insure that no moisture is introduced into a LIN system<br />
and that there is no moisture in or on fittings,<br />
nozzles, or valves where it may enter the aircraft system<br />
during servicing operations.<br />
j. Before filling the aircraft system, insure that the pressure<br />
relief valve on the LIN supply tank is operating<br />
properly.<br />
4.22 HYDRAZINE SERVICING.<br />
NOTE<br />
Refer to <strong>TO</strong> 42B1-1-18 for hydrazine neutralization<br />
and dilution guidance.<br />
Hydrazine is a widely used industrial chemical and is very<br />
corrosive and hypergolic. Hydrazine appears as a clear, oily<br />
liquid having an ammonia-like odor. Since individual sensitivity<br />
to the odor may vary, and since prolonged exposure<br />
Skin contact with liquid hydrazine or exposure to<br />
concentrations of hydrazine vapor present a serious<br />
health hazard.<br />
NOTE<br />
Hydrazine is hazardous because it may enter the<br />
body via lungs (breathing), gastrointestinal tract<br />
(swallowing), or through the skin (absorption).<br />
Additionally, there is a fire hazard present with<br />
hydrazine-water mixtures. (See step c.)<br />
a. Short Term (acute) Overexposure. If exposed to high<br />
concentrations of hydrazine for short periods, dizziness,<br />
nausea, or irritation of eyes, nose, throat, or lungs<br />
may result. Liquid contact may cause skin burns. In<br />
very high concentrations, unconsciousness may occur.<br />
b. Long Term (chronic) Overexposure. If exposed to concentrations<br />
of hydrazine vapors above permissible exposure<br />
limits over long periods, damage to kidneys and<br />
liver may occur. Frequent skin contact with liquid hydrazine<br />
may also result in damage to kidneys and liver.<br />
A yellow discoloration of skin and eyes may be apparent.<br />
Refer to <strong>TO</strong> 42B1-1-18 for a summary of health<br />
effects and for guidance covering the handling and use<br />
of hydrazine.<br />
c. Fire Hazard. The 70 percent hydrazine and 30 percent<br />
water mixture used in the F-16 EPU is a flammable<br />
mixture. Fires involving hydrazine can be fought and<br />
extinguished with common extinguisher agents. Water<br />
is the preferred agent for fire suppression.<br />
4.23 HYDRAZINE PROTECTIVE CLOTHING AND<br />
EQUIPMENT.<br />
<strong>Air</strong>-supplied respirators are required for those operations in<br />
which engineering controls and work practices are not sufficient<br />
to reduce exposure below the permissible exposure<br />
limits. If respirators are used, they must meet the requirements<br />
of AFOSH STD 48-137 and <strong>TO</strong> 42B1-1-18. Because<br />
hydrazine can be absorbed through the skin, it is necessary<br />
to wear approved clothing during those situations where there<br />
may be contact with the liquid. Protective clothing approved<br />
for handling hydrazine is discussed in <strong>TO</strong> 1F-16( )-2-49GS-<br />
<strong>00</strong>-1, Protective Clothing for Handlers of Missile Fuels and<br />
Oxidizers. Occupational health requirements are outlined in<br />
<strong>TO</strong> 42B1-1-18.<br />
4-20