COCKPIT VOICE RECORDER
The cockpit voice recorder (CVR) system con-
tinuously records the previous 30 minutes of
flight crew conversations, radio communica-
tions, and cockpit sounds. The audio inte-
grating system and a cockpit microphone
supply communication input sounds to the
CVR.
The CVR system consists of a recorder, mi-
crophone, impact switch, underwater locating
device, and control unit (Figure 16-9). The
recorder uses an operational recording chan-
nel for the pilot, copilot, and remote area mi-
c r o p h o n e . T h e o v e r h e a d p a n e l m o u n t e d
microphone records flight deck conversations
and sounds. The microphone filters 400 HZ
electrical noise from adjacent equipment and
wiring.
During aircraft rapid deceleration, the impact
switch disconnects power to the CVR to pre-
vent possible tape erasing. The underwater
locating device contains a beacon that trans-
mits on an ultrasonic frequency when in con-
tact with water.
The CVR is tested before flight by pressing the
TEST switch and visually observing meter
deflections four times into the green band on
the CVR test meter.
16-10
CL 601-3A/R
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
L t é e
L t d .
CL-600-2B16 PILOT TRAINING MANUAL
COCKPIT VOICE RECORDER
TEST
HEADSET
600 OHMS
ERASE
GO
O
D
6
8
4
2
0
10
METER
USED TO MONITOR TONE
BURST DURING TEST.
TEST SWITCH
INITIATES OPERATIONAL
TEST OF VOICE RECORDER.
VOICE MICROPHONE
PICKS UP VOICE COMMUNICATION
IN THE FLIGHT COMPARTMENT.
ERASE SWITCH
WHEN ACTIVATED FOR AT LEAST TWO SECONDS.
ERASES THE ENTIRE RECORDED INFORMATION,
PROVIDED THE AIRCRAFT HAS LANDED AND THE
PARKING BRAKE IS ON.
GREEN BAND
PROVIDES INDICATION OF PROPER
OPERATION WHEN TEST SWITCH IS PRESSED.
HEADSET MONITOR JACK
PROVIDES FOR CONNECTION OF A HEADSET FOR CONTINUOUS AND
SIMULTANEOUS MONITORING OF ALL FOUR RECORDED CHANNELS.
Figure 16-9. Cockpit Voice Recorder