An official website of the United States government
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

Home : PS Mag Archive : Articles
Would you stake your life, right now, on the condition of your equipment?
Articles
NEWS | June 24, 2020

New Zeta III Helmet Liners Available

Soldier wearing HGU-56/P Helmet.

Courtesy Photo 82nd Combat Aviation Brigade


This article initially appeared in PS 800 (Jun 19), pp. 20-21.

Helmets are important when flying aircraft. Just as important are the helmet liners. They need to fit your noggin well to ensure both safety and comfort. 

The newest in helmet liners, Zeta III, is now approved as an alternate for the HGU-56/P, the RWH-56/P Rotary Wing Helmet and the Apache Aircrew Integrated Helmet (AAIH).
 
Zeta III helmet liners approved as alternate
Zeta III helmet liners approved as alternate
 
The liners come in 3/8-, 1/2- and 5/8-in thicknesses. Helmets are important when flying aircraft. Just as important are the helmet liners. They need to fit your noggin well to insure both safety and comfort. However, Apache pilots who use the AAIH version of the HGU-56/P helmet may notice that the 1/2- and 5/8-in liners compress during flight.
 
Zeta III liners approved for AAIH Helmet 
Zeta III liners approved for AAIH Helmet 

That can have an effect on viewing the integrated helmet and display unit (IHDU). If this happens, switch to the 3/8-inch Zeta III or alternate thermoplastic liner (TPL) or super comfort liner (SCL). The ZETA III helmet liners will be used for the HGU-56/P rotary wing helmet (RWH). The RWH will slowly replace the current HGU-56/P flyer’s helmet.
 
Zeta III Helmet Liners
XXS Helmets
Thickness NSN 8415- PN
3/8-in 01-671-3685 9A-0043-102
1/2-in 01-671-3705 9A-0043-103
5/8-in 01-671-3706 9A-0043-104
XS & Small Helmets
3/8-in 01-671-3711 9A-0038-102
1/2-in 01-671-3713 9A-0038-103
5/8-in 01-671-3715 9A-0038-104
Medium Helmets
3/8-in 01-671-3740 9A-0039-102
1/2-in 01-671-3742 9A-0039-103
5/8-in 01-671-3744 9A-0039-104
Large Helmets
3/8-in 01-671-3758 9A-0040-102
1/2-in 01-671-3761 9A-0040-103
5/8-in 01-671-3768 9A-0040-104
XL Helmets
3/8-in 01-671-3772 9A-0041-102
1/2-in 01-671-3779 9A-0041-103
5/8-in 01-671-3781 9A-0041-104
 
If you need to order SCL or TPL helmet liners for the HGU-56/P, the RWH-56/P or AAIH, choose from this list:
 
SCL for HGU-56/P
Size NSN 8415-
XXS 01-624-7837
XS 01-624-7869
S 01-624-7866
M 01-624-7865
L 01-624-7863
XL 01-624-7838
 
TPL for RWH HGU-56/P
Size NSN 8415-
XXS 01-666-2501
XS 01-666-2498
S 01-666-2496
M 01-666-2402
L 01-666-2399
XXL 01-666-2388
 
TPL for HGU-56/P
Size NSN 8415-
XXS 01-394-9999
XS 01-395-0000
S 01-395-1555
M 01-395-0001
L 01-395-0002
XL 01-395-0003

If you’ve got questions about the helmets, contact James Hauser by email: 
 
General aviation
Want to get better search results faster? 
Click the link below to access our "how to" guide.
After entering a keyword, you must hit or click the Search bar/box below for the function to work.
Simply hitting Return won't yield results.
LOGSA Links/URLs
Note about links to archive articles

If you come across a link to a pre-2014 PS Magazine issue or article that uses LOGSA in the web address (URL), use this link instead:
 
For issues/articles from 2014 and after, click on the Archive/Index tab in the top menu of this website.