Seepage of fluid (as indicated by wetness or discoloration) not great enough to form
Leakage of fluid great enough to form drops but not enough to cause drops to drip from
item being checked/inspected.
Leakage of fluid great enough to form drops that fall from the item being
Equipment operation is allowable with minor leakage (Class I or II) of any fluid except fuel. Of
course, consideration must be given to the fluid capacity in the item being checked/inspected.
When in doubt, notify your supervisor. When operating with Class I or II leaks, continue to check
fluid level more often than required in the PMCS. Parts without fluid will stop working and/or
cause equipment damage. Class III leaks should be reported to your supervisor or unit level
If the equipment must be kept in continuous operation, check and service only those items that
can be checked and serviced without disturbing operation. Make the complete checks and
services when the equipment can be shut down. Within designated interval, these checks are to
be performed in the order listed.