Embraer EMB145 Operation Manual page 1192

EMERGENCY
AIRPLANE
INFORMATION
OPERATIONS
MANUAL
EMERGENCY LOCATOR TRANSMITTER (ELT)
ELT C406-2 MODEL
The ELT C406-2 Model, when activated, transmits a radio signal on
frequencies of 121.5 and 243.0 MHz, and every 50 seconds, for 520
milliseconds (long message protocol), the transmitter turns on, using
the 406.025 MHz frequency, to facilitate airplane location during search
and rescue operations.
During 406.025 MHz time an encoded digital message is sent to the
satellite. The information contained in that message is shown below:
- Serial number of the transmitter or aircraft ID;
- Country code;
- ID code;
- Position coordinates (when connected to an ARTEX ELT/NAV
interface unit).
The system comprises a transmitter with an ON/OFF switch and an
impact switch installed in the lavatory right ceiling panel, an antenna
located on the top rear and a remote panel located on the cockpit.
ELT may be manually or automatically activated. In both cases a red
light flashes on the cockpit panel to indicate the ELT activation.
Manual activation is performed by setting the ON/OFF switch to the
ON position.
Automatic activation occurs when the transmitter switch is set to OFF
position, the cockpit switch is set to ARM position and the airplane
suffers a deceleration greater than 5 g's.
In both cases (manual and automatic activation) the pilot may
deactivate the ELT by performing the TEST/RESET function.
Page Code
1 03
1-10-20
REVISION 31