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ELT switch.
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Emergency locator transmitter.
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ELT antenna.
A flight compartment switch located on the overhead panel provides “ON” and “ARM” modes of operation. The switch can be used to manually activate the ELT for test purposes or emergency situations.
LIGHT SENSOR - ELT PANEL
ELT Switch
ON . When selected the ELT will begin to transmit.
ARM/RESET . Normal position selected to arm the system for automatic activation.
FGF0610_003
LIGHT SENSOR . ELT PANEL
If the system is accidentally activated, the unit can be reset by placing the switch to ON, then back to ARM/RESET.
Rev 12, Aug 14, 2006 Flight Crew Operating Manual Volume 2
The ELT transmits signals on 121.5, 243.0 and optional 406.025 MHz. The 406.025 MHz may be installed as part of the ELT and its signal is transmitted for satellite relay. Upon activation, the 121.5,
243.0 signals operate continuously until the self contained battery pack power is exhausted (typically last at least 72 hours) or the unit is reset. If the optional 406 MHz transmitter module is installed, the output signal is transmitted for 24 hours (once every 47 seconds) then automatically shuts off. The 121.5, 243.0 signals are shut off while the 406 MHz signal is transmitting.
ELT SCHEMATIC
ELT ANTENNA
An internally mounted “G” switch is triggered on impact and activates the ELT. The ELT antenna is mounted on the top aft exterior of the airplane and interfaces with all signal outputs. When the ELT is transmitting, a signal is sent to the transmitter to DAU 2. This signal used by the DAU provides an ELT transmitting advisory message to EICAS.
Volume 2 Flight Crew Operating Manual Rev 12, Aug 14, 2006
Airborne Data Link System (ADLS) operation is via the third VHF comm, UHF (telephony) or SATCOM and controllable from all FMS CDUs. The system utilizes the same data loading unit as the FMS with printer interface, air.ground.air and air.to.air capabilities. Crew advisory messages are displayed on the CDU scratch pad.
Communication Links
Third VHF COMM . Using the SYSTEM SELECT page on the RMU, the pilot can select COM 3 MODE to be VOICE or DATA. When DATA is selected, the data link is in control of the radio; data frequency is selectable only through the data link.
SATCOM . Automated to this link as required (VHF or UHF not available). Pilot selectable if desired.
UHF (Telephony) . Available through the Cabin Communication System. Weather maps (graphical weather) could be routed to the airplane via this medium.
Data Link Features
Flight Planning
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Requests flight plans from service provider.
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Reports current flight plan to service provider.
Enroute Winds Aloft
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Request winds aloft for flight plan.
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Report current wind at present position.
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