TM 1-1520-238-23
Change 5
1-149
1.47.
CLEANING - GENERAL
1.47.1. Description
This task covers:
Nonremovable Parts. Removeable Parts. Surfaces and Areas. Exterior Water Wash. Electronic/
Electrical Equipment. Hydraulic Hoses and Components. Bearings. Cleanable Filters.
1.47.2. Initial Setup
Tools:
Light duty laboratory apron (item 27, App H)
Industrial faceshield (item 129, App H)
Chemical protective gloves (item 154, App H)
Industrial goggles (item 156, App H)
14-quart utility pail (item 222, App H)
Adjustable air filtering respirator (item 262, App H)
Materials/Parts:
Brush (item 34, App F)
Cloth (item 52, App F)
Dry cleaning solvent (item 74, App F)
Methyl ethyl ketone (item 124, App F)
Tape (item 206, App F)
Wrapping paper
References:
TM 55-1500-322-24
WARNING
Chemicals used for cleaning are explosive, flammable, and highly poisonous. Always assure
maximum ventilation when using solvents, methyl ethyl ketone (MEK) and dry cleaning sol-
vent. Accidental breathing of vapors can cause dizziness and nausea. If methyl ethyl ketone
contacts the skin, rinse immediately with water. If dry cleaning solvent or methyl ethyl ketone
contacts the eyes, flush with water and seek medical aid. When working with cleaning materi-
als, wear protective clothing and guards.
CAUTION
When cleaning parts, surfaces, and areas of the helicopter: dry cleaning solvent and methyl ethyl
ketone 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. Never expose bearings, rubber, or paint to methyl ethyl
ketone. 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.
Any area or surface of a part or assembly sensitive to methyl ethyl ketone must be masked before
cleaning.
When cleaning parts, surfaces, and areas of helicopter that will require bonding, sealing, or painting
in immediate subsequent repair operations, methyl ethyl ketone (item 124, App F) shall be used.
GO TO NEXT PAGE
