TM 10-3930-653-14&P LEAKAGE DEFINITIONS FOR OPERATOR/CREW 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’s  (Class  I  or  II).    Of  course,  consideration must be given to the fluid capacity in the item/system being checked/inspected.  When operating with Class I or II leaks, continue to check fluid levels as required on your PMCS.  Class III leaks should be reported to your supervisor or organizational maintenance. B-33