AIRPLANE
OPERATIONS
MANUAL
POWERPLANT
REVISION 37
2-10-30
Page
3
Code
01
AOM-145/1114
STARTING BY USING GROUND EQUIPMENT
The system is pressurized by pneumatic ground equipment connected
to start the engine 2.
The SCV energizes to open when a starting switch ground signal
energizes the engine 2 start relay.
When the engine gas generator attains 53% N2, a validation time of
10 seconds elapses before the message “E2 ATS SOV OPN” appears
on the EICAS. At 56.4% N2 the FADEC sends a signal to engine 2
start relay be de-energized, thus the SCV is also de-energized and the
airflow stops flowing to the ATS turbine. In normal operation
conditions, 56.4% N2 is reached in less than 10 seconds.
The ATS turbine stops operating and the engine gas generator speed
increases.
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