Operation Manual Part 2

Aerosoft – Digital Aviation
CRJ-70 & CRJ-900
AOM PART 2
Systems Description
VOL
5
5-1-123
26-Jul-2017
INTERTURBINE TEMPERATURE (ITT) MONITORING
The temperature is measured in the gas-path after leaving the high-pressure turbine (HPT) by several probes.
The signals are sent to the FADEC for processing. The FADEC distinguishes between three types of ITT
exceedances and triggers equivalent messages which may be temporarily or permanent until N
2
of the
affected engine decreases below 2%.
VIBRATION MONITORING
Engine vibration is measured on the first / N
1
stage and second / N
2
stage by accelerometers. In case excessive
vibrations are detected, respective messages appear on the EICAS.