and thoroughly air clothing for 1 hour to allow
dilution of the oxygen concentration. When an
uninsulated container of LOX is touched or when
there is any reason to suspect some part of the
body has been frozen or chilled, the area should
be thoroughly washed or immersed in clean
water that is slightly above body temperature
(approximately 104°F to 113°F). The exposed
area should then be loosely wrapped with clean,
dry dressing, and medical aid sought immediately.
When servicing and maintaining LOX
systems, the AME will be required to transfer
LOX from servicing trailers to aircraft converters,
and occasionally from the converter to a drain
pan. The AME will also be required to remove
and install converters and other components of
LOX systems. All servicing and maintenance of
LOX systems must be done in accordance with
the instructions contained in the applicable air-
craft MIM. All safety precautions concerning the
handling of LOX must be adhered to.
When a completely empty system is being
serviced, the LOX should be added slowly to cool
the converter down to the storage temperature
(– 297°F). The converter could otherwise be
damaged by thermal shock or rapid pressure
buildup.
Additional gaseous and liquid oxygen safety
precautions and handling procedures are provided
in the following publications:
1. NAVAIR Al-NAOSH-SAF-000/P5100/l ,
NAVAIROSH Requirements for the Shore
Establishment
2. NAVAIR 06-30-501, Technical Manual of
Oxygen/Nitrogen Cryogenic Systems
All personnel handling oxygen and maintain-
ing gaseous or liquid oxygen systems should be
thoroughly familiar with all the precautions and
procedures listed in the latest revisions to
these publications. They should also be familiar
with the specific precautions provided in the
applicable aircraft MIM and those pertaining to
the type of equipment being used to service such
systems.
SYSTEM COMPONENTS
Aircraft LOX systems are similar to gaseous
oxygen systems except that the several cylinders
of gaseous oxygen are replaced by one or more
LOX converters. The use of more than one
converter provides for an adequate supply of
oxygen on long-range flights or where there is
more than one crew member using the oxygen
system. In addition to the converter(s), most LOX
systems contain a heat exchanger, shutoff valves,
and quantity indicating units. See figure 4-7 for
a schematic diagram of a LOX system.
Container
The LOX converter consists of an inner and
outer shell of stainless steel separated by a
vacuum. A blowout disc provides a margin of
safety from explosion if a leak occurs in the
inner shell.
Figure 4-7.—LOX system schematic.
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