Oxygen Mask Microphone Test

Question 1

What are you testing

Answer 1

Microphone of mask, will hear the flow of oxygen through the flight deck speaker.

Question 2

explain test

Answer 2

MASK/BOOM to MASK
FLT INT PUSH
SPKR ON
TEST/RESET switch push and hold
EMerg/test select push and hold
Push to talk INT
Push,. the push to talk switch and emerg/test selector and test.reset switch. Verify oxygen flow heard through speaker.
Release all.