GENERAL PMCS PROCEDURES - Continued
2. While performing PMCS, inspect the following components:
a. Bolts, Nuts, and Screws. Ensure that they are not loose, missing, damaged, or broken. Tighten any
that are loose.
b. Welds. Inspect for gaps where parts are welded together. Report bad welds to your supervisor.
c. Electric Wires or Connectors. Inspect for cracked or broken insulation, bare wires, and loose or
broken connectors. Inspect all wires and connections for corrosion. Make repairs or replace
d. Hoses, Lines, and Fittings. Inspect for wear, damage, and leaks. Ensure that clamps and fittings
are tight. If a leak originates from a loose fitting or connector, tighten it. If a component is broken
or worn, correct problem if authorized by the Maintenance Allocation Chart (MAC). If not authorized,
report it to your supervisor.
Equipment operation is allowable with minor leakages (Class I or II).
Of course, consideration must be given to the fluid capacity of the item
or system being checked. When in doubt, ask your supervisor.
When operating with Class I or II leaks, continue to check fluid levels as required in your
PMCS. Class III leaks should be reported immediately to your supervisor. It is necessary to know
how fluid leakage affects the status of the vehicle. The following are definitions of the classes of
leakage an operator or crew member needs to know to be able to determine the condition of the
leak. Learn and then be familiar with them, and REMEMBER - WHEN IN DOUBT, ASK YOUR
Leakage Definitions for Crew/Operator PMCS.
CLASS I - Seepage of fluid (as indicated by wetness or discoloration) not great enough to form
CLASS II - Leakage of fluid great enough to form drops but not enough to cause drops to drip
from item being checked.
CLASS III - Leakage of fluid great enough to form drops that fall from the item being checked.