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
