(pm halo) helmet assembly - Gentex Corporation

5. Inspect the communications components as follows:a. Inspect the ear cushions for secure attachment to earcups, cleanliness,cuts, tears or evidence of compression set and hardening.b. Inspect earcups or leather earpads for breakage or other damage thatcould impair safety or sound attenuation.c. Inspect cords for breaks or frayed areas.d. Plug the microphone cable and plug assembly into the MQ-1/MQ-1A orDMH-1 tester and assure that the microphone and earphones areworking properly. Speak into the microphone. The microphone andearphones are operating properly when the voice is transmitted from themicrophone through the amplifier and heard in the headset.6. Inspect the visors and goggles as follows:NOTE: Visors and goggles are not required for altitude chamber studenttraining use.a. Inspect the straps to ensure that the nylon webbing and cotton elasticare not frayed or torn and that snap fasteners or hook/pile fasteners areall in good working condition.b. Visually inspect the visor snap fasteners for proper clinching of thefastener components.• The roll barrels in each snap socket and stud must be rolled over allaround. They should have a symmetrical, donut-shaped appearance.Any fastener on which the barrel material is not completely rolledover the edge of the stud or socket must be discarded.• Any roll with more than three splits that extend over the top of thebarrel and are readily detectable by visual observation shall beregarded as defective.c. Inspect the rubber edge beading at the top the visor lens for unbondedsections, cuts, tears, or holes.d. Inspect visor/goggle lens for cracks, scratches, dust particles andsmears. If visors are scratched, replace as necessary. Minor scratchesnot interfering with critical vision area are permissible.7. Inspect the nape strap and the chin strap for cleanliness and to ensure thatthe fabric and stitching are not frayed or torn; the buckles on the chin strapand the nape strap are not corroded, bent, or broken; the retainer screws inthe chin strap and the nape strap are securely attached and are notcorroded; and the washers are properly positioned.(Continued on next page)23