TM5-3815-223-14&P
5. It is necessary for you to know how fluid leaks affect the status of your equipment. The following are
definitions of the types/classes of leakage you need to know to be able to determine the status of your
equipment. Learn and be familiar with them and REMEMBER - when in doubt, notify your supervisor.
LEAKAGE DEFINITIONS FOR UNIT PMCS
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 to drip from the item
being checked/inspected.
CLASS III Leakage of fluid great enough to form drops that fall from the item being checked/inspected.
CAUTION
Equipment operation is allowable with minor leakage (Class I or II). Of course
consideration must be given to the fluid capacity in the item/system being
check/inspected. When operating with Class I or II leaks, continue to check fluid
levels as required on your PMCS. Class II leaks should be reported to your
supervisor or unit maintenance.
B-14
