TM 1-1520-238-23
Change 9
1-157
1.49.
CORROSION CONTROL/INSPECTION – continued
NOTE
Expendables listed include alternates to be used in the absence of the primary materials.
This task can be performed in its entirety or by sections, as required, to comply with scheduled
maintenance or special inspection requirements.
WARNING
Chemicals used for cleaning are explosive, flammable, and highly poisonous. Always assure
maximum ventilation when using solvents, such as dry cleaning solvent. Accidental breathing
of vapors can cause dizziness and nausea. If dry cleaning solvent contacts the eyes, flush with
water and seek medical aid. When working with cleaning materials, wear protective clothing
and guards.
CAUTION
When cleaning parts, surfaces, and areas of the helicopter, dry cleaning solvent must be prevented
from spilling or spattering on wiring, adjacent parts, or compartments particularly under the work area.
Where cleaning agents can run on or contact ball or roller bearings, rubber parts, or painted surfaces:
these areas shall be covered or masked, and dry cleaning solvent (item 74, App F) shall be used for
cleaning. Use clean dry rags as a protective coating for nonaffected items or areas. If necessary, use
wrapping paper and tape (item 206, App F) to mask wiring, parts, surfaces, openings, or seams.
1.49.3. General Corrosion
a. Everyone must ensure that safe, clean work habits and methods are used to prevent corrosion. Refer
to TM 1-1500-344-23 for more information.
b. Corrosion of metal starts as soon as a part is made, and continues through the life of the metal.
Protective coatings and preventive maintenance can slow or stop corrosion.
c. Check readability of part number and serial number when removing corrosion near identification
plates, covers, and placards.
(1) Use aircraft records to verify part number and serial number.
(2) Use permanent ink that contrasts with color of part if numbers are not present or are unreadable.
(3) Stencil part number and serial number on identification plate, cover, or placard in area originally marked.
(4) Characters shall be a minimum of 0.125 INCH high.
(5) Cover dried ink with a protective coat of clear lacquer.
GO TO NEXT PAGE
