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Since the radios can receive tuning commands from either the CDU or the MFD tuning methods, in
the event of a tuning malfunction, the crew can isolate one or all of the tuning sources.
The reversionary control panel includes three TUNE INHIBIT PUSH switch/lights providing tuning
inhibit functions. The switch/lights illuminate white when selected, and are labelled as follows:
• CDU 1 INHIB – used to inhibit tuning control from the left CDU;
• CDU 2 INHIB – used to inhibit tuning control from the right CDU; and
• MFD INHIB – used to inhibit tuning control from both MFDs.
When a CDU 1 (2) INHIB switch/light is pressed, the TUNE page is blanked on the associated
CDU. The on-side MFD ignores tuning requests from the disabled CDU, and displays inputs
provided from the opposite CDU. If both CDU INHIB switch/lights are pressed, the MFD ignores
tune requests from both CDUs. As a result, tuning is only available by the MFD/CCP tuning
method.
If MFD TUNE INHIBIT is selected, the CDU ignores MFD tune requests, and the MFD radio tuning
window is blanked. Only the vertical division lines remain in view.
Should all three TUNE INHIBIT switch/lights be pressed, all radio tuning is inhibited. VHF Comm.
no.1 is automatically tuned to the emergency frequency of 121.5 MHz. The MFD radio tuning
window shows a frequency display of 121.50 in the COM 1 data block, along with the abbreviation
EMER shown below it. All other tuning and control data is removed.
COMMUNICATIONS
Description
Vol. 2 06−10−17
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
RADIO TUNING (CONT'D)
TUNE INHIBIT Switch/lights
Figure 06−10−12
COCKPIT VOICE RECORDER SYSTEM
Description
The cockpit voice recorder (CVR) continuously records:
• Radio communications;
• Flight crew conversations;
• Aural warnings; and
• General sounds from the flight compartment.
The CVR is installed in the aft equipment compartment, and is colored orange for quick
identification. An underwater locator device is installed on the unit, to aid in unit location if
submerged. The device contains an acoustic beacon, battery and a water-activated switch.
The CVR begins recording automatically when electrical power is applied to the aircraft. Audio is
recorded on audio channels and stored in the CVR solid state memory. Up to 120 minutes of data
is stored on the CVR, with older voice data being overwritten as time progresses. An additional
audio channel is used to record a time signal, which aids in synchronizing data between the CVR
and flight data recorder (FDR).
COMMUNICATIONS
Description
Vol. 2 06−10−18
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
COCKPIT VOICE RECORDER SYSTEM (CONT'D)
A CVR control panel is located on the right side console and includes:
• Test button – Enables an audio tone to be generated by the CVR.
• Test light – Illuminates when test indicates CVR is functioning correctly.
• Headset jack – For monitoring of audio and test tone during a test.
• Erase button – For bulk erase of CVR memory. This function is only possible when aircraft
is on ground with parking brake applied.
A flight compartment general area microphone is installed on the forward overhead panel, next to
the ELT control switch. The microphone picks up compartment sounds and provides it to the CVR.
COMMUNICATIONS
Description
Vol. 2 06−10−19
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
COCKPIT VOICE RECORDER SYSTEM (CONT'D)
Cockpit Voice Recorder
Figure 06−10−13
STATIC DISCHARGERS
Description
Static dischargers are installed on the trailing edges of the primary flight control surfaces. The
static dischargers allow for the gradual bleed-off of static electrical charges during flight.
COMMUNICATIONS
Description
Vol. 2 06−10−20
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
STATIC DISCHARGERS (CONT'D)
Static Dischargers Location
Figure 06−10−14
EICAS MESSAGES
MESSAGE MEANING
AURAL WARNING (IF
ANY)
SELCAL HF 1
SELCAL HF 2
A call for this aircraft has been detected on the
respective high-frequency radio. Message will be
cancelled when that radio is keyed to reply.
“SELCAL”
COMMUNICATIONS
Description
Vol. 2 06−10−21
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
COMMUNICATIONS
　
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