Warning Systems Flashcards
The primary method for alerting the crew to non-normal conditions is
“system alert messages.”
Equipment faults which may affect airplane dispatch capability are shown by
status messages.
The rectangular icon is removed when the checklist is
complete or when inhibited by the checklist of another message.
There are three priority levels with the EICAS alert messages.
These are
warning, caution and advisory level.
The red EICAS alert messages
will always remain displayed and cannot be
cancelled by the flight crew.
Amber EICAS alert messages
can be cancelled and
recalled by pushing the CANC/RCL switch.
Communication alerts are
displayed in white below the alert messages.
The communication alerts cannot
be cancelled by pushing the CANC/RCL switch.
To provide a cross reference
to the item or system for dispatch capability,
all status messages are
listed in the Minimum Equipment List (MEL).
Each successive page can be displayed by pushing the
CANC/RCL switch.
Warning messages are displayed at the top of each page.
There is no page numbering for numerous warning messages.
It is not possible to display other pages
in this situation until the warnings no longer exist.
The most recent EICAS memo message is displayed
at the bottom of the memo messages.
If there are additional status pages, pushing the
STAT button will display each succeeding page.
This works in a similar manner to the CANC/RCL switch.
To display currently displayed engine indications
and additional EICAS
maintenance information,
the EICAS EVENT RCD switch
is pushed.
Up to five events may be recorded by the first five pushes.
When a system parameter is exceeded, the system will automatically
record the out of limit parameters and related conditions.
The siren cannot be silenced until the condition is corrected,
but the master WARNING light is
extinguished by pushing the master WARNING / CAUTION reset switch.
There are some messages associated with the siren that can be silenced ex. Cabin Altitude
Pilot Response
A high-low chime announces a new EICAS
medium-level communication alert.
The respective EICAS warning message CONFIG is displayed if
the airplane is on the ground,
with the FUEL CONTROL switches in the RUN position,
and either engine thrust is in takeoff range,
the thrust reversers are not unlocked or deployed,
and the airspeed is less than V1.
For the warning message CONFIG GEAR STEERING airspeed must be less
than 80 kt.
Takeoff configuration warnings are annunciated for any of the following configurations:
an entry, forward cargo, or aft cargo door is not latched and locked;
flaps not in the takeoff position;
main gear steering not locked;
parking brake set;
rudder trim not centered;
SPEED BRAKE lever not in DOWN detent;
stabilizer trim not in the green band.
he EICAS warning message CONFIG GEAR is displayed if
the airplane is in flight and any landing gear is not down and locked,
with either thrust lever closed and radio altitude less than 800 ft,
or the FLAP lever in the landing position.
o prevent potential conflicts between required maneuvers during alerts,
the three warning systems are prioritized as follows:
Windshear, GPWS and TCAS.
If a GPWS or PWS warning alert occurs
and TA/RA has been selected
on the transponder,
the RA mode will
automatically be inhibited.
All RA aircraft will now be shown as TA aircraft.
When the GPWS and PWS warning alerts are no longer in effect,
the RA mode inhibit will end.
Certain EICAS alert messages are time delayed,
even though
related flight deck panel annunciator lights are illuminated.
Automatic display of new TCAS warnings,
EGPWS/GPWS terrain alerts or PWS alerts are
inhibited in the event of an immediate windshear alert.
If a new EGPWS / GPWS terrain alert occurs when both NDs
are in MAP, MAP CTR, VOR, or APP mode,
TERR will be automatically selected for both NDs.
If a new EGPWS/GPWS terrain alert occurs and only one ND is
in MAP, MAP CTR, VOR, or APP mode,
TERR will be automatically selected for that ND.
If a new PWS occurs
when both ND’s are in
MAP, MAP CTR, VOR, or APP mode,
the WXR is automatically selected for both ND’s.
If a new PWS alert occurs when only one ND
is in MAP, MAP CTR, VOR, or APP mode,
the WXR is automatically selected for that ND.