5.15 WARNING SYSTEMS

Question 1

Time Critical Warnings:

Answer 1

▪ Time critical warnings alert the crew of a non-normal operational condition
requiring immediate crew awareness and corrective action to maintain safe
flight.
▪ Master warning lights, voice alerts, PFD and HUD indications or stick shakers
announce time critical conditions.

Question 2

Warnings:

Answer 2

Warnings alert the crew to a non-normal operational or system condition
requiring immediate crew awareness and corrective action.

Question 3

Cautions:

Answer 3

Cautions alert the crew to a non-normal operational or system condition
requiring immediate crew awareness. Corrective action may be required.

Question 4

Advisories:

Answer 4

Advisories alert the crew to a non-normal operational or system condition
requiring routine crew awareness. Corrective action may be required

Question 5

EICAS messages :

Answer 5

An EICAS alert, communications, or memo message is no longer displayed when
the respective condition no longer exists.

Question 6

Can we cancel the Communication messages?

Answer 6

Communication messages cannot be cancelled by pushing the CANC/RCL switch

Question 7

What is considered time critical warning?

Answer 7

o pull up
o wind sheer
o engine fail
o speed break.

Question 8

When the Takeoff Configuration Warnings arms?

Answer 8

o airplane is on the ground, and
o FUEL CONTROL switches are in RUN position, and :
o either engine thrust is in takeoff range, and
o thrust reversers are not unlocked or deployed, and
o airspeed is less than V1.

Question 9

When the Landing Configuration Warnings arms?

Answer 9

o The landing configuration warning system alerts the crew the landing gear is not
extended for landing. The EICAS warning message CONFIG GEAR is displayed if:
▪ The airplane is in flight, a landing gear is not down and locked and one of
these occurs :
▪ Below 800 feet radio altitude and a thrust lever is at idle
▪ The flaps are in a landing position

Question 10

Describe time critical warnings. How are they announced?

Answer 10

o It requires immediate crew awareness and corrective action to mantain safe flight .
o Master Warning lights , voices alerts , and PFD and HUD indications or stick shakers
announce time critical conditions.

Question 11

Describe Warning alert ?

Answer 11

o RED alerts, requires immediate crew awareness and action.
o Warning light and aural warning sounds.

Question 12

Describe how the GPWS Look-Ahead Terrain Alerting Display is activated and where it
will display.

Answer 12

o It is displayed on the ND and mini-map by selecting Terrain. It is depicted by 3 colors:
▪ Green : Terrain is between 500’ and 2000’ below the aircraft.
▪ Yellow : Terrain is between 500’ below and 2000’ above the aircraft.
▪ Red : Terrain is more than 2000’ above the aircraft.

Question 13

How do you select Ground Proximity Flap Override? What is inhibited when selected and
what is displayed? Does the system reset automatically?

Answer 13

o It is selected through the Tunning and Control Panel ( TCP ) - GPWS switch.
o It inhibits TOO LOW FLAPS and TOO LOW TERRAIN ; The EICAS message GPWS FLAP
OVRD is displayed.
o The system resets 10 min after cabin door is opened after landing.

Question 14

Which TCAS alerts generate maneuver guidance on the PFD?

Answer 14

RA’s

Question 15

Which TCAS alerts generate voice aural alerts?

Answer 15

TA’s and RA’s.

Question 16

Does a TA require an avoidance maneuver?

Answer 16

No ( QRH NNM – If traffic is sighted , maneuver if needed ).

Question 17

What are the 4 categories of TCAS traffic displayed on the ND?

Answer 17

o Resolution Advisory RA’s
o Traffic Advisory TA’s
o Proximate Traffic
o Other Traffic.

Question 18

How is each category pictorially represented?

Answer 18

o Resolution Advisory (RA) with a filled Red square
o Traffic Advisory (TA) with a filled Amber circle
o Proximate Traffic with a filled white diamond
o Othe Traffic with a hollow white diamond.

Question 19

Which ND modes will not display TCAS traffic symbols?

Answer 19

Plan mode.

Question 20

When will the message ‘TRAFFIC’ appear on the ND?

Answer 20

If a RA or TA is detected.

Question 21

Is the Predictive Windshear warning active at all altitudes?

Answer 21

No, it scans for windshear below 2300’ and displays windshear below 1200’.

Question 22

What is the significance of an Advisory message being at the top of its list?

Answer 22

It is the most recent message.

Question 23

What is the effect of pressing the EICAS Event Record Switch?

Answer 23

Records 5 EICAS events.

Question 24

Describe TAMS. Where does it appear and when ?

Answer 24

o Trust Asymmetry Minimum Speed
o It is a system that provides aural and visual warnings to alert the crew of the minimum
control speed with large asymmetry. Displayed on the speed tape.
o TAMS varies with weight and CG and is approximately equal to minimum control speed
for the current thrust applied during take off or go-around.
o When airspeed decreases to TAMS , the AIRSPEED , AIRSPEED aural sounds and Master
WARNING illuminates.