ELT

Emergency locator transmitter

Consists of transmitter unit (in aft avionics compartment), emergency locator transmitter buzzer (in aft avionics compartment), external antenna (on top of rear fuselage), and remote panel (in cockpit). Transmits on the following frequencies:

406 MHz every 50s for 24 hours
121.5 MHz and 243 MHz until batteries are discharged, approximately 72 hours

The ELT can be activated either by an internal 'G' switch, or using the On/Off switch on the transmitter. The buzzer alerts the pilot that the ELT has been activated. There is also a red transmit alert light on the remote panel. This light is also used to diagnose problems such as a 'G'-switch loop open (1 flash), a 406 MHz transmitter problem (3 flashes), or a battery problem (7 flashes).

Categories: Embraer 170/190 | Flight Instruments/Comm/Nav/FMS