737 Flight Crew Operations Manual
Supplementary Procedures -
Communications
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
SP.5.2 D6-27370-866-EGP
Cockpit Voice Recorder Test
YK996 - YQ456
Test switch ........................................................................................ Push
Hold switch for 5 seconds. Observe that the TEST light illuminates.
A tone may be heard through a headset plugged into the headset
jack.
Cockpit Voice Recorder Test
YK981 - YK995, YW273, YW274
Test switch ........................................................................................ Push
Hold switch for 5 seconds. Observe that the STATUS light flashes
once. A tone may be heard through a headset plugged into the
headset jack.
September 15, 2016
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