Engine Inlet Bypass Failure
The INLET NOT BP annunciation will display on the PFD when the Engine
Inlet Bypass fails to reach the BYPASS position. If this annunciation appears,
move the Engine Inlet Override switch to BYPASS. The override actuator
will force the system to BYPASS and the
INLET NOT BP annunciation will
disappear and
ENG INLET BP annunciation will appear. In the unlikely
event that both actuators fail to move the Engine Inlet to BYPASS, exit icing
conditions IMMEDIATELY.
Engine Inlet Does Not Return to Normal
The INLET NOT NRM annunciation will display on the PFD when the Engine
Inlet does not reach the NORMAL position within 18 seconds after being
switched to NORMAL from BYPASS mode. If this occurs, move the Engine
Inlet back to the BYPASS position, using the Engine Inlet Override switch, if
necessary, and inspect the system after landing.
Engine Inlet Switch Fault
In the event that INLET SW FAULT annunciation is displayed in ight, the
pilot must verify that the Inertial Separator is operating properly, or take
corrective action. The table below lists two scenarios that could lead to
INLET SW FAULT annunciation, along with corrective action.
Scenario
In-Flight
Corrective Action
Diagnosis
1. Primary ENG INLET
switch in BYPASS
position.
2. ENG INLET BP and
INLET SW FAULT CAS
messages shown.
None. Engine inlet is in the
BYPASS position (as indicated by
ENG INLET BP annunciation).
Either one BYPASS
position sensor has failed
in the OFF position, or
the NORMAL position
sensor is stuck (failed) in
the ON position.
1. Primary ENG INLET
switch in NORMAL
position.
2. Only
INLET SW FAULT
CAS message shown.
1. Move Primary ENG INLET switch
to BYPASS position.
2. Verify INLET SW FAULT CAS
message is no longer shown and
ENG INLET BP is now shown.
3. Engine inlet is now in the
BYPASS position.
One BYPASS position
sensor is stuck (failed) in
the ON position.
Table 3-1 – Engine Inlet Miscompare Troubleshooting Table
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