Classes of Leaks. Maintenance personnel must know the following types/classes of leaks in order to
determine whether the assembly is operational. Learn these leakage definitions. When in doubt, notify your supervisor.
Seepage of fluid, not great enough to form drops, is indicated by wetness or discoloration.
Leakage of fluid great enough to form drops, but not great enough to cause continuous dripping
from the Item being Inspected.
Leakage of fluid great enough to form drops that continuously drip from the Item being
Acceptable Leakage. Equipment operation is allowed with minor Class I or II leakage. Fluid levels in an
item/system, affected with such leakage, must be checked more frequently than required In PMCS. When in doubt,
notify your supervisor.
Unacceptable Leakage. Class III leaks render the Item unserviceable and must be reported to your
4-11. REPORTING REPAIRS (AVIM).
Immediately after completing AVUM PMCS procedures, if preformed at the AVIM level, report all defects found on DA
Form 2404, Equipment Inspection and Maintenance Worksheet. All defects shall be reported before taking corrective
action, and shall also be entered in the equipment log.