Insert replacement cord through grommet hole in shell and attach grommet to helmet shell.
Secure cord in strain relief and attach strain relief to helmet shell using screw, washer and post removed in step
Secure jack plate and mounting plate to helmet shell using screws removed in step 2, removal.
Install thermoplastic liner and energy-absorbing liners per paragraph 3-5, replacement steps 1-3.
Feed cord through earcups and attach grommet to earcup.
Attach cord leads to earphone, insert earphone into earphone holder, and place both in earcup.
Insert microphone cord plug into connector.