Change 3 5-11
3. Check helmet fit in accordance with Chapter 4. Zetaliner can be moved slightly forward or
aft to accommodate helmet fit.
4. Adjust earcups. Add, cut, or adjust spacers as required.
5. Connect chin strap.
6. Adjust nape strap.
7. Don and adjust oxygen mask.
8. Have crewmember subjectively evaluate fit and make any necessary adjustments.
Due to the white color of the EAL, correction fluid will not be used to mark the location
of TPL. Use a contrasting permanent marker to mark the proper location of the TPL in
accordance with the instructions below.
Excessive marker fluid applied to EAL will damage the liner. Use care when applying
marker fluid to the EAL.
Zetaliner placement in helmet after fitting has a direct effect on mask adjustment,
offset, and comfort. Notify crewmember if zetaliner is removed or installed.
9. Apply permanent marker sparingly and press against the EAL to ensure correct installation
of the zetaliner when removed.
Prior to marking the zetaliner and EAL, insure the helmet has been properly fitted to
the crewmember. Zetaliner will be marked to correspond to the EAL markings. It may
be necessary for the crewmember to fly with the helmet on to determine the correct
comfort position for the zetaliner prior to performing the marking procedures.
10. Mark two dots of permanent marker in front and one in the rear.
c. Zetaliner Washing Instructions.
1. Using a mild soap, hand wash or machine wash, gentle cycle, the zetaliner. To remove
excess water, rinse and squeeze lightly.
2. Hang to dry in a warm place. Insure the zetaliner is completely dry prior to reinstalling into
d. Inspection of the Zetaliner.
1. Remove the zetaliner from the helmet.
2. Inspect zetaliner cover fabric for cleanliness, deterioration, worn, spots, tears, cuts, broken
or skipped stitches.