Systems - Warning Systems

Question 1

How many Alert System Levels are there?

Answer 1

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

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

Cautions:
- Caution alert the crew to a non-normal operation or system condtion requiring immediate crew awareness. Corrective action may be required.

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

EICAS messages:
- EICAS Alert (Time critical, Warning Alerts or Advisories)
- Communications,
- Memo,
- Status
-EICAS Alert, Communications or Memo messages are no longer displayed when the respective condition no longer exists.

Question 2

What are examples of time critical warnings?

Answer 2

• pull up
• wind sheer
• engine fail
• speed brake

Question 3

Can we cancel Communication messages?

Answer 3

• No, communication messages cannot be cancelled by pushing the CANC/RCL switch.

Question 4

When does the Takeoff Configuration Warning arms?

Answer 4

• Airplane is on the ground
• FUEL CONTROL switches are in RUN position
• Either engine thrust is in takeoff range
• Thrust reversers are not unlocked or deployed
• Airspeed is less than V1

Question 5

What conditions arm the warning of Landing Configuration?

Answer 5

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, Landing gear is not down and locked and one of these occurs:

• Below 800ft radio altitude and thust lever is at idle.
• The flaps are in landing position.

Question 6

Describe time critical warnings. How are they announced?

Answer 6

• Requires immediate crew awareness
• Corrective action needed to maintain safe flight
• Announced by Master Warning lights, voice alerts, PFD and HUD indications, or stick shakers

Question 7

Describe Warning alert?

Answer 7

• Red alerts, require immediate crew awareness and action.
• Warning light and aural warning sounds

Question 8

How is the GPWS Look-Ahead Terrain Alerting Display activated and where it will display?

Answer 8

Displayed on the ND and mini-map by selecting Terrain. It is depicted in 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 9

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

Answer 9

• It is selected through the Tunning and Control Panel (TCP) - GPWS switch.
• It inhibts the following warnings:
• TOO LOW FLAPS
• TOO LOW TERRAIN

The EICAS message GPWS FLAP OVRD is diplayed
- The system resets 10 min after cabin door is opened after landing.

Question 10

Which TCAS alerts generate maneuver guidance on the PFD?

Answer 10

• RA’s

Question 11

Which TCAS alerts generate voice aural alerts?

Answer 11

• TA’s
• RA’s

Question 12

Does a TA require an avoidance maneuver?

Answer 12

• No (QRH - NNM - If traffic is sighted maneuver if needed).

Question 13

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

Answer 13

• Resolution Advisory (RA’s)
• Traffic Advisory (TA’s)
• Proximate Traffic
• Other Traffic

Question 14

How is each category of TCAS traffic pictorially represented?

Answer 14

• RA: Filled Red square (15 to 35 seconds)
• TA: Filled Amber circle (20 to 48 seconds)
• Proximate Traffic: Filled white diamond (6 miles +/- 1200 Ft)
• Other Traffic: Hollow white diamond

Question 15

Which ND modes will not display TCAS traffic symbols?

Answer 15

• Plan mode

Question 16

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

Answer 16

• If a RA or TA is detected

Question 17

Is the Predictive Windshear warning active at all altitudes?

Answer 17

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

Question 18

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

Answer 18

• It is the most recent message

Question 19

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

Answer 19

• Records 5 EICAS events

Question 20

Describe TAMS. Where does it appear and when?

Answer 20

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