TO 1-1-700 - Robins Air Force Base
TO 1-1-700 - Robins Air Force Base
TO 1-1-700 - Robins Air Force Base
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<strong>TO</strong> 1-1-<strong>700</strong><br />
Table 8-3. Deterioration of Non-Metallic Materials - Continued<br />
Material<br />
Type of Attack to Which<br />
Material is Susceptible<br />
Cloth Dry rot, mildew Discoloration, tears, dust<br />
Conformal coating Moisture, scratches Peeling, flaking, bubbling<br />
Cork Moisture, mildew, dry rot Discoloration, dust, peeling<br />
Elastomer Heat, UV light, excessive cycling Cracks, crazing, discoloration<br />
Encapsulation UV light, moisture Cracking, peeling, disbonding<br />
Felt Moisture, mildew Discoloration, looseness<br />
Glass Heat, mechanical damage Cracked, discolored<br />
Appearance of Deterioration<br />
Laminates UV light, moisture solvents Discolored, disbond, delamination<br />
Paint Moisture, heat, humidity Bubbles, peeling, cracking<br />
Polymers Extreme heat, solvents Discoloration, deformation<br />
Potting compounds UV light, moisture, heat Discoloration, cracks, deformation<br />
RTV (non-corrosive) Moisture, UV light, heat Peeling, debonding, discoloration<br />
Sealants Moisture, UV light, heat Peeling, debonding, discoloration<br />
8.5.6.3 Evaluation of Damage. Corrosion damage should<br />
be classified as either repairable or non-repairable. Non-repairable<br />
damage is damage that exceeds the limits specified in<br />
equipment system specific technical manuals. If no limits are<br />
present, consult the appropriate engineering authority for disposition<br />
of damaged items.<br />
8.6 CLEANING.<br />
Cleaning is an essential step in performing preventative maintenance<br />
and corrosion control on electronic equipment. Thorough<br />
cleaning prior to the inspection maximizes the chances<br />
that the technician will be able to locate all signs of corrosion.<br />
Once the corrosion has been removed, thorough cleaning minimizes<br />
the chances that corrosion byproducts will contaminate<br />
the component and facilitate continued corrosion.<br />
8.6.1 Required Materials and Support Equipment. It is<br />
essential that technicians understand the purpose, function,<br />
and applications of all materials and support equipment. Use<br />
of incorrect materials or processes can damage equipment,<br />
cause corrosion, or aggravate existing corrosion. Table 8-3<br />
contains a list of approved consumable materials. Table 8-4<br />
contains a listing of approved equipment and accessories.<br />
Table 8-5 contains recommended methods for cleaning various<br />
types of electronic equipment.<br />
Table 8-4. Electronic Cleaning and Corrosion Removal Consumable Materials<br />
Item<br />
No.<br />
Nomenclature Specification National Stock No. Unit of Issue Intended Use<br />
1 Abrasive Mat,<br />
Aluminum<br />
Oxide Abrasive<br />
A-A-58054 Type I,<br />
Grade A, Class I<br />
(Very Fine) or<br />
A-A-58054 Type I,<br />
Grade B, Class 1<br />
(Fine)<br />
ABRASIVES<br />
5350-00-967-5089<br />
5350-00-967-5093<br />
Pkg. of 10,<br />
9″ x 6″ pads<br />
Pkg. of 10,<br />
9″ x 6″ pads<br />
Aluminum oxide impregnated<br />
nylon webbing used for<br />
removal of dirt and corrosive<br />
products from external avionic<br />
chassis, covers, mountings,<br />
hardware, antennas, electrical<br />
connector shells, etc.<br />
8-7