Section III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

TM 5-4220-226-14&P Section III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) 4-6. Introduction. This section lists the monthly preventive maintenance checks and services to be performed at the organizational maintenance level. a. Item Number Column. Checks and services are listed in the order of performance. This column shall be used as a source of item numbers for the TM Number Column on DA Form 2404, Equipment inspection and Maintenance Worksheet, in recording results of PMCS. b. Item To Be Inspected Column. Indicates the portion of the equipment to be inspected. c. Procedure Column. Contains a brief description of the procedure by which the check is to be performed. 4-7. Organizational Preventive Maintenance Checks and Services. Refer to table 4-1 for organizational monthly preventive maintenance checks and Services. Table 4-1. Organizational Monthly Preventive Maintenance Checks and Services ITEM ITEM TO BE PROCEDURE NO. INSPECTED 1 Helmet Assembly Clean and inspect helmet shell, weights, and faceplate. 2 Neck Dam and Yoke Assembly Clean and inspect neck dam and yoke assembly. 3 Nose Clearing Device Check for smooth operation. 4 Emergency Air Supply Valve Inspect valve to ensure it is clean and undamaged. Open and close the valve to ensure that the valve turns smoothly. 5 Demand Regulator Inspect for dents or other signs of damage. Turn dial-a-breath knob in and then fully out to check for smooth operation. Press purge button to ensure valve resets correctly. . 6 Umbilical Flush exterior with fresh water. Inspect cables and hoses for cracks or other damage. Inspect coupling nuts for thread damage. 7 Communications Whip Flush exterior of cable with fresh water. Inspect cable for cracks, fraying, or other damage. Inspect electrical connector for cracks, bent pins, or other damage. SECTION IV. TROUBLESHOOTING PROCEDURES 48. Introduction. a. Table 4-2 lists the common malfunctions which you may find during the operation or maintenance of the helmet or its components. You should perform the tests/inspections and corrective actions in the order listed. 4-3