TM 1-8415-216-12&P
TABLE 4-1. Aviation Unit Preventative Maintenance Checks and Services
ITEM
NO.
1 .
2.
3.
INTERVAL
Every 120 days
Every 120 days
Every 120 days
Inspect surface for cracks, running
side to side on the helmet shell
measuring longer than 1 inch, cracks
are forked or branched, or penetrating
the light-colored inner fiber layers.
Every 120 days
Inspect the edge for cracks.
Every 120 days
Inspect the eardome area for holes or
cracks.
Every 120 days
Every 120 days
Every 120 days
4.
5.
Every 120 days
Every 120 days
ITEM TO BE INSPECTED/
PROCEDURE
Helmet shell.
WARNING
Do not repair or use any helmet that
is damaged beyond the limits set forth
in the PMCS charts. Injury or death
may result if you do.
Inspect edge beading for cuts. tears.
or looseness.
Inspect surface for cracks, running
front to back, measuring longer than 2
inches. cracks are forked or
branched. or penetrating the light-
colored inner fiber layers.
Inspect visible surface for
Helmet shell (interior).
delaminations larger than a nickel.
Lining, Helmet. Shock, (TPL)
Inspect Cloth cover for dirt.
Inspect plastic layers for adhesion.
Lining, Helmet, Shock, (EAL)
Inspect liner for breaks and
separations.
Earcups.
Visible surface has delaminations
larger than a nickel.
Cover IS greasy, oily, or dirty.
Layers are separated.
Breaks or separations exist.
Inspect earcup for cracks, breaks, or
Earcup is cracked or broken;
loose/missing hook fastener on back.
hook fastener is loose or missing.
NOT FULLY MISSION
CAPABLE IF:
Edge beading has cuts or tears
exceeding one inch or is dangling
from helmet shell.
Surface has cracks, running front
to back. measuring longer than 2
inches, cracks are forked or
branched. or penetrating the light-
colored inner fiber layers.
Surface has cracks, running
side to side on the helmet shell
measuring longer than 1 inch,
cracks are forked or branched, or
penetrating the light-colored inner
fiber layers.
Edge has any cracks.
Any cracks penetrate all fiver
layers, aor any holes in
eardome area.
Change 1
4-3
