01 March 2005
TYPE OF FLUID
Softening or swelling of some polymers.
Lack of coating adhesion; introduction of insulative films on electrical
Attacks some seal and gasket materials.
Attacks organic seals.
Increased condensation causing pooling of fluids in bilge areas; corrosive
attack of unprotected bimetallic couples; introduction of insulative films on
(free water, urine, condensation, desiccants)
electrical connector contact surfaces.
Softening and/or reduced adhesion of some organic coatings and cracking
(solvents, detergents, cleaners, strippers)
of some wire insulation.
equipment, serious corrosion attack will occur in the
and moisture resistant packaging with an active
presence of moisture. Instructions for proper packaging
desiccant. The following unacceptable conditions should
are given in MIL-STD-2073-1.
3-15.6. STORAGE. Even traces of corrosive vapor in
a. Equipment with a high replacement rate that is
packages containing aircraft parts may result in serious
corrosion. Moreover, the natural breathing of packages
may introduce moisture into the parts and equipment.
b. Equipment moved on an open flat bed vehicle
Some packing materials have been known to decompose
between the removing/installing activity and the repair
and emit corrosive vapors during periods of prolonged
shops that is unprotected.
storage. Avionic equipment should not be stored in
wooden boxes, fiberboard containers, or vented
c. Equipment exposed to the environment awaiting
containers, especially during air shipment. Refer to
transfer to the repair shop or depot activity that is
NAVAIR 15-01-500 (Navy), TM 743-200-1 (Army), or
T.O. 1-1-17 (Air Force) for additional storage information.
3-15.5. PACKAGING. Packaging is intended to protect
3-15.7. SHIPMENT. During shipment, materials such
equipment or components against corrosion,
environments that were not considered during the design
and storage. Avoid the use of unsuitable materials, or
stage. Materials shipped by air are subjected to changes
corrosion attack may occur as a result of improper
in atmospheric pressure and can lose volatile
packaging materials. Proper packaging techniques are
components by outgassing. The vibration and
not necessarily limited to the manufacturing or shipping
mechanical shocks associated with shipment by truck
activity but concern the shop technician as well. Certain
can damage protective coatings or platings. Shipment
woods, cottons, foams, and papers absorb moisture
by ocean vessel may expose the equipment to corrosive
and are susceptible to mold and fungus attack. These
marine environments, vibrations and shock from engines
materials, and shredded newspaper, excelsior, and
or sea conditions, and residual corrosive vapors from
fiberboard, may emit acidic vapors. Corrosive vapors
previous shipments. Equipment should be properly
are not only a product of wood but other incompletely
packaged in accordance with MIL-STD-2073-1 to
cured organic materials such as glues, paints, varnishes,
minimize damage during shipment. Packaging
damaged during shipment should be repaired as soon
of organic materials such as adhesives, gaskets,
sealants, wire insulation, sleevings, tubing, plastics,
and circuit board varnishes also may produce corrosive
3-15.8. AIRCRAFT FLUIDS. Many fluids can be
organic acid vapors. When corrosive vapors are
present in various areas of an airframe. Table 3-4 lists
released in a confined space or in a piece of avionic