TM 1-8415-216-12&P
Change 3 5-9
5-10. Maintenance of Foam Tips and CEP.
a. When the foam tips become soiled, detach from CEP and wash with mild, soapy water and air dry.
Wash foam tips sparingly.
b. Discard tips if the foam degrades in any way or becomes separated from the plastic insert inside the
foam.
c. Do not leave the CEP attached to the helmet when not in use. Care should be taken to keep the tip
ends free from damage. Store the CEP in the hinged-lid plastic container when not in use.
d. Remove tips and inspect for any blockage through the center channel of the foam.
e. Reattach tip ensuring that the rigid center channel is inside the recessed portion of the vinyl housing.
f. Check wire for break in insulation. If a break is discovered, replace the CEP.
5-11. Zetaliner.
The zetaliner is a self-molding fit system for the HGU and SPH series flight helmets, and the parachutist
helmet. The multi-layer construction of the zetaliner consists of a core of visco-elastic foam covered with a
fabric designed to adhere to hook fastening strips on the helmet’s energy-absorbing liner (EAL) surface and a
perspiration wicking fabric on the scalp surface. Once donned by the crewmember, the foam core of the
system reacts to body temperature, forming to the individual cranial shape. The wicking nature of the inner
fabric and the cooling qualities of the confor foam eliminated perspiration problems while reducing skin
temperature 1.5 degrees F.
NOTE
The visco-elastic foam material used in the zetaliner is temperature-sensitive. This
material reacts to body temperature and molds to the users head, forming a custom fit
every time the helmet is worn. In cold weather, the material will feel stiff, but will react
to body heat and return to its optimum temperature of 81 degrees F. in approximately
20 seconds.
When ordering Oregon Aero products, ensure size of item, part number, and
national stock number are used if available. For assistance in ordering
products, contact base supply or Oregon Aero at (800) 888-6910.
a. Zetaliner Removal/Inspection.
1. Remove the standard TPL from the helmet in accordance with Chapter 4.
2. Inspect the EAL for serviceability in accordance with Chapter 4.
NOTE
It may be necessary to clean the EAL area with isopropyl alcohol prior to attaching the
hook tapes.
3. Zetaliner Installation.
(a) Install the hook tapes on EAL if not installed.
