Equipment operation is allowable with minor leakage (Class I or II). Consideration
must be given to the fluid capacity in the item/system being checked/inspected. When
in doubt, notify the supervisor. When operating with Class I or II leaks, continue to
check fluid levels as required in the PMCS. Class III leaks should be repaired per
Class I. Seepage of fluid as indicated by wetness or discoloration not great enough to form drops.
Class II. Leakage of fluid great enough to form drops but not enough to cause drops that fall from item
Class III. Leakage of fluid great enough to form drops that fall from the item being checked/inspected.
Air System Components. Look for worn, damaged or leaking components. Make sure clamps and fittings
are tight. If a leak comes from a loose fitting or connector, tighten it. If something is broken or worn out, either repair
or replace it.
Damage. Damage is defined as any condition that affects safety or would make the FRS unserviceable for
2-9. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) TABLES.
Do the SEMIANNUAL PREVENTIVE MAINTENANCE (Table 2-1) once every six months.
Do the ANNUAL PREVENTIVE MAINTENANCE (Table 2-1) once each year.
Do the BIENNIAL PREVENTIVE MAINTENANCE (Table 2-1) once every two years.
Always do the PREVENTIVE MAINTENANCE in the same order until it gets to be a habit. Once practiced,
it will be easy to spot anything wrong in a hurry. Perform the checks and services listed in Tables 2-1 and 2-2 in the
If something does not work, troubleshoot with instructions in Section IV.
If anything looks wrong and is not fixed, write a DA Form 2404/5988-E.
When doing preventive maintenance, take along the tools and supplies needed to make all the checks,
including a clean rags.