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1. Forum
3. Boeing
5. 767
7. ATA 23 Communication
9. ATA 23-51, Oxygen Mask Microphone

ATA 23-51, Oxygen Mask Microphone

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• Mark
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7 months 3 weeks ago - 7 months 3 weeks ago #733 by Mark

ATA 23-51, Oxygen Mask Microphone was created by Mark

A/C just out of "C" check. Both mask mics inop.

After some digging, found wires one and two swapped at back of stowage box plugs.

This reverse bias's the microphone and it will not work.

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Last edit: 7 months 3 weeks ago by Mark.

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9. ATA 23-51, Oxygen Mask Microphone

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