Working around edge of earcup, carefully use screwdriver or awl to lift retention over earcup tabs. Position
retention so that the four corner earcup tabs are visible on outside of retention (See Figure 3-8).
Insert communications cord and rubber grommet into hole at rear of replacement earcup. If necessary,
CAREFULLY use screwdriver to work grommet securely into hole.
Insert 1/4-inch filler pad into earcup, leaving communications cord leads exposed.
Attach communications cord leads to earphone using small flat-tip screwdriver or hex key as desired.
When performing Step 7, ensure earphone speaker holes will face ear when helmet is worn.
Insert earphone into earphone holder, and insert both into earcup.
Reposition "V" strap through loop of retention.
Repeat procedure for other earcup.
10. Have crewmember don helmet; verify helmet fit.
Figure 3-8. Replacement Earcups Installed