TCAS

Question 1

What will you get if the other aircraft only has a mode A transponder

Answer 1

Traffic advisory

Question 2

When will the system issue a resolution advisory

Answer 2

15 to 35 seconds CPA

Question 3

When will the system issue a traffic advisory

Answer 3

20 to 48 seconds CPA

Question 4

When will the system issue a proximate advisory?

Answer 4

Traffic that is within 6nm away and is not classified as TA or RA

Question 5

What is the surveillance and display range?

Answer 5

Surveillance - 14 nm
Display - 12 nm

Question 6

How many aircraft can be detected and tracked simultaneously?

Answer 6

Up to 30

Question 7

Where are the TCAS antennas?

Answer 7

Two - one on the top and one on the bottom of the fuselage

Question 8

What are the possible options for the A/B pb?

Answer 8

ABV - 9900 to -2700 ft
Normal - 2700 to -2700 ft
BLW - 2700 to -9900 ft

Question 9

What does the RNG pb do?

Answer 9

Switches between the 6nm and 12nm forward range

Question 10

What is the STBY mode?

Answer 10

Power is supplied to the system but TCAS functions are inhibited

Question 11

What is the AUTO mode?

Answer 11

Normal operating mode

TCAS tracks all the aircraft in surveillance area and provides RAs and TAs

Question 12

What is the TA ONLY mode?

Answer 12

Same as AUTO but no resolution advisories

Question 13

What is the maximum range for traffic display on the indicators?

Answer 13

12 nm

Question 14

What is the minimum range?

Answer 14

6 nm with the inner range ring remaining at 2 nm

Question 15

What happens when mode selector is set to STBY?

Answer 15

All TCAS operations disabled

Indicated by a TCAS OFF flag displayed on right hand side of the display

Question 16

What does an open cyan diamond mean?

Answer 16

Other traffic - traffic within the selected display range but not considered a threat

Question 17

What does a solid cyan diamond mean?

Answer 17

Proximate traffic - within +/- 1200 ft relative altitude and 6nm but not considered a threat

Question 18

What does a solid yellow circle mean?

Answer 18

Traffic advisory - approx 40 secs from the CPA

Question 19

What does a solid red square mean?

Answer 19

Resolution advisory - 25 secs from CPA

Question 20

When will there be an up or down arrow?

Answer 20

Aircraft is climbing or descending at more than 500fpm

Question 21

What are traffic advisories inhibited?

Answer 21

900 ft AGL when the aircraft is descending

1100 ft AGL when the aircraft is climbing

Question 22

What does “climb crossing climb” indicate?

Answer 22

The flight path of the aircraft will cross the path of the other traffic whilst maintaining separation

Question 23

What does “adjust vertical speed - adjust” indicate?

Answer 23

You should reduce or increase the rate of climb to that shown by the green arc on the VSI/TRA

Question 24

What does “reduce descent” mean?

Answer 24

You should reduce rate of descent to that shown on the green arc

Question 25

What does “monitor vertical speed, monitor vertical speed” mean?

Answer 25

You should monitor your present vertical speed to prevent entering the restricted vertical speed range depicted by the red arc on the display

Question 26

What does “climb - climb now” mean?

Answer 26

Indicates a reversal of vertical speed is required

Question 27

When are descend advisories inhibited?

Answer 27

When the aircraft is less than 1000 ft AGL during an approach or below 1200 ft AGL on take off

“Increase descent” advisories are inhibited less than 1450 ft during a descent and less than 1650 ft during an approach

Question 28

When are résolution advisories inhibited?

Answer 28

When aircraft is less than 1100 ft AGL during a climb and 900 ft AGL during a descent

TCAS automatically reverts to TA ONLY mode at these points

Question 29

When is an intruders altitude ignored?

Answer 29

When it is below 380 ft, it is considered to be on the ground

Question 30

What failure indications appear on the VSI/TRA?

Answer 30

VS failure

RA FAIL

TCAS FAIL

Question 31

What does TD FAIL flag mean?

Answer 31

Displayed when the TCAS traffic detection function is unreliable

Question 32

What does RA FAIL mean?

Answer 32

Indicates that the resolution advisory is unreliable

Question 33

What does VS flag mean?

Answer 33

Indicates the VS is unreliable

The VS pointer will be removed from view

Question 34

What does a TCAS FAIL flag mean?

Answer 34

Will be displayed and replace TEST flag if a failure is detected during a test