B737 Cockpit Voice Recorder Panel

CVR PNL
P5 FWD OVERHEAD
CVR SW
P5 FWD OVERHEAD

Area Microphone

  • Activated: When an engine is started or the VOICE RECORDER switch is placed in the ON position.

ERASE Switch (red)

  • Push (2 seconds):
    • All four channels are erased.
    • Operative only when the airplane is on the ground and the parking brake is set.

TEST Switch

  • Push:
    • Press for 1 second, then release.
    • STATUS light illuminates once within 6 seconds.
    • A tone may be heard through a headset plugged into the HEADPHONE jack within 6 seconds.

CAUTION: Depressing the TEST Switch for longer than 2 seconds will erase all CVR recorded data.

HEADPHONE Jack

  • Headphone may be plugged into jack to monitor tone transmission during test, or to monitor playback of voice audio.

STATUS Light

  • Illuminated (momentary green) – no faults are detected during recorder TEST.

VOICE RECORDER Switch

  • AUTO – powers the cockpit voice recorder from first engine start until 5 minutes after last engine shutdown.
  • ON – powers the cockpit voice recorder until first engine start, then trips the switch to AUTO.