Operator Preventive Maintenance Checks and Services (Cont)

TM 5-4220-225-14 Table 2-1. Operator Preventive Maintenance Checks and Services (Cont). B - Before D - During A - After Q - Quarterly Interval Item Item to be Inspected. Equipment Will Be No. B D A Q Procedure Reported Not Ready If HELMET ASSEMBLY (Cont) • b. Wash the exposed helmet surfaces with clean freshwater. A mild detergent may be used. Rinse thoroughly with clean freshwater if detergent is used. NOTE Ensure the areas under the edges of the liner, mixed gas ducting, and other crevices are cleaned. • c. Clean viewports with clean freshwater only. • d. Dry the helmet thoroughly with a clean, lint-free cloth. • e. Wipe down the cleaned exposed helmet surfaces with two ounces of tincture-of-green soap mixed with one gallon of hot (1400F) water. • f. Rinse off disinfectant with clean freshwater. Dry thoroughly with a clean, lint-free cloth. • g. Ventilate the helmet thoroughly prior to stowage or use. h. Remove the test plug and reinstall the air supply Inspection reveals any of the diffuser and ear clearing pad. defects sighted above or any defect that renders the helmet inoperable. 2-9