POWERPLANT
AIRPLANE
O
PERATIONS
MANUAL
2-10-40
Page
8
Code
01
REVISION 41
Copyright © by Embraer. Refer to cover page for details.
FADEC DISCRETE OUTPUTS
Each FADEC provides two discrete output signals, as follows:
− N2 Speed Switch - Each FADEC activates a discrete output
whenever the engine is assumed to be running, based on N2.
This signal is activated whenever N2 reaches (accelerating)
56.4% and is deactivated whenever N2 drops below 53%.
− ECS OFF signal.
ALTERNATE FADEC SELECTION
AUTOMATIC SELECTION
− Whenever the FADEC in control is unable to safely control the
engine, it signals the alternate FADEC to automatically take over
engine control.
MANUAL SELECTION
− The alternate FADEC may be manually selected to control the
engine, by momentarily setting the FADEC Control Knob,
located on the overhead panel, in the ALTN position.
The FADEC that is in control (A or B) is indicated on the EICAS.
FADEC RESET
The FADEC may be reset through the FADEC Control Knob. Upon
r
eceiving the FADEC Control Knob input, the FADEC clears recorded
inactive faults (faults not currently being detected).
In case any fault persists after the RESET command, it is not cleared.
Reset does not mean electrical power interruption to the FADEC.
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