TM 9-2320-386-10 2-19 2-9. CLASS LEAKAGE DEFINITIONS Wetness around seals, gaskets, fittings, or connections indicates leakage. A stain also denotes leakage. If a fitting or connector is loose, tighten it. If broken or defec- tive, report it. Use the following as a guide: a. Class I. Leakage indicated by wetness or discoloration not great enough to form drops. b. Class II. Leakage great enough to form drops but not enough to cause drip from item being checked/inspected. c. Class III. Leakage great enough to form drops that fall from the item being checked/inspected. CAUTION Operation is allowable with Class I or II leakage except for brake and fuel system. Any brake fluid or fuel leakage must be report- ed. WHEN IN DOUBT, NOTIFY YOUR SUPERVISOR. When operating with Class I or II leaks, check fluid levels more fre- quently. Class III leaks must be reported to your supervisor or to unit maintenance. Failure to do this may result in damage to vehicle and/or components.