INTRODUCTION AND GENERAL DESCRIPTION
This booklet provides operation and maintenance instructions, as well as an
illustrated parts breakdown (IPB) on page 24, for the GENTEX® SPH-5® Helmet
Assembly (Figure 1).
The SPH-5 is a lightweight helmet assembly providing head protection, noise
reduction, and communication enhancement for helicopter personnel. It consists
of an impact-resistant helmet shell, a polystyrene energy-absorbing liner, a
preformed thermoplastic liner (TPL®) that allows for custom-fitting, a yoke-style
retention assembly (including a chinstrap and a nape strap — both adjustable),
sound-attenuating earcups, a dual visor assembly, and a communications
assembly featuring a boom-mounted microphone and dual earphones. The
helmet is available in four sizes: small, regular, X-large, and XX-large. (Other
visor assembly styles are available and are listed at the end of this booklet.
Contact Gentex Corporation for more information.)
Figure 1. SPH-5 Helmet Assembly
GENTEX®, SPH-5®, and TPL® are registered trademarks of GENTEX Corporation.
1
HELMET
SHELL
BOOM AND
MICROPHONE
EARCUP
ASSEMBLY (2)
RETENTION
ASSEMBLY
DUAL VISOR
ASSEMBLY
ENERGY-ABSORBING
LINER
TPL
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