Table 2-1. Operator Preventive Maintenance Checks and Services.
Within designated intervals, these checks are to be performed in the order listed.
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.
B - Before
D - During
A - After
Q - Quarterly
Item to be Inspected.
Equipment Will Be
Reported Not Ready If
Perform quarterly planned maintenance when
helmet is stowed for prolonged periods.
Exterior. Visually inspect to ensure all components
and parts are properly installed and in good
Shell and Base.
a. Inspect the shell and base for dirt, corrosion,
dents, cracks or chips, and sealant deterioration.
b. Visually inspect for loose or missing base-to-shell
Inspection reveals any of the
defects sighted above or
any defect that renders the
a. Inspect the viewports for scratches, chips and
A scratch 1/32-inch deep
cracks. Smaller scratches do not constitute a
and more than 1-inch long
safety hazard but may obscure vision.
If on the requires replacement of
inside surface, it can be reversed and continued
viewport. If both surfaces
in use. Switching the left and right viewports will
are marred so that vision is
reverse these surfaces.
obscured, replace the view-
port. If the viewport is
cracked or chipped any-
where, replace it.