1-3.2 HELMET SHELL
AS SEM BLY (Fig ure 1-2)
The hel met shell as sem bly
is in tended to pro vide head
pro tec tion dur ing in-flight
buf fet ing and emer gen cies
such as ejec tion, bail out,
or crash land ings. It has a
poly sty rene en ergy-ab sorb ing
liner and a fit ted leather
edgeroll in stalled. Earshell
pile fas ten ers on each side
of the hel met in te rior help
hold earcups in place. A
boom swivel on the left side
(as worn) of the hel met shell
al lows for the mount ing of a
boom/mi cro phone as sem bly.
Op tional bay o net re ceiv ers
(not shown) can be in stalled
to hold an ox y gen mask.
1-3.3 THER MO PLAS TIC
LINER (TPL®) AS SEM BLY
(Fig ure 1-3)
The TPL as sem bly, used in
con junc tion with the en ergy-
ab sorb ing liner in stalled in the
hel met shell as sem bly, pro -
vides hel met sta bil ity and
com fort. The TPL as sem bly
con sists of pre formed
plas tic lay ers and a wash able
cloth cover, which are held
to gether by dou ble-sided tape.
If nec es sary, the TPL as sem -
bly can be cus tom-fit ted to the
aircrew mem ber’s head. The
TPL as sem bly co mes in three
sizes: me dium, large, and
ex tra large.
1-2
HELMET SHELL
ENERGY-ABSORBING
LINER
EDGEROLL
EARSHELL PILE
FASTENER
BOOM
SWIVEL
Fig ure 1-2. Hel met Shell As sem bly
Fig ure 1-3. TPL As sem bly
TPL® is a reg is tered trade mark of GENTEX
Cor po ra tion.
DOUBLE-SIDED
TAPE
PLASTIC LAYERS
CLOTH COVER
