Gentex HGU-56/P, Operation And Maintenance Instructions

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3. Referring to Figure 2-31 , do the following:
a. From outside the helmet, insert the screw through the flat washer, the flex boom mount,
and the microphone attachment hole in the helmet.
b. From inside the helmet, insert the nut through the lock washer, and attach the nut to the
screw.
c. Tighten the screw to prevent the flex boom mount from moving on the helmet. Re-check
the screw during periodic inspection to ensure tightness.
d. Plug the microphone into the connector at the rear of the helmet.
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Figure 2-31. Flex Boom Microphone
Inside helmet Outside helmet
Helmet
Screw
Flat washer
Lock washer
Nut
Flex boom mount
Alternate location
of flex boom mount
NOTE: You can install the flex boom
mount outside or inside the helmet
as shown here.
Microphone
plug
Connector