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EMB > TCAS > Flashcards

TCAS Flashcards

1
Q

What does TCAS II provide?

A

Collision avoidance commands in the pitching plane

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2
Q

When is there a requirement for TCAS?

A

MTOM > 5700kg or more than 19 passenger seats

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3
Q

What kind of traffic can TCAS see?

A

Transponding traffic.

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4
Q

What is the envelope for the RA?

A

15 - 35 seconds.

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5
Q

What is the range of a TCAS system?

A

30nm and plus/minus 2700ft

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6
Q

What is the guaranteed range in a high density traffic area?

A

6NM

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7
Q

What is proximate traffic?

A

non-threatening traffic within 6NM and 1200ft

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8
Q

What happens to RAs as radio altitude decreases?

A

RAs are progressively inhibited.

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9
Q

When are all RAs inhibited?

A

below 1000ft

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10
Q

When are RAs that recommend an increase in rate of descent inhibited?

A

below 1450ft radio altitude

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11
Q

When are RAs that recommend a descent inhibited?

A

below 1100ft.

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12
Q

When are all aural commands inhibited?

A

Below 500ft

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13
Q

What is an RA?

A

A resolution advisory

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14
Q

What is a TA?

A

A traffic advisory

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15
Q

What is the crew response to an RA?

A

Disengage the autopilot and follow the instructions smoothly and promptly.

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16
Q

What should the pilot do in the TCAS RA conflicts with the ATC clearance?

A

Follow the TCAS RA of the purpose of immediate avoidance of danger but inform ATC ASAP

17
Q

What are the typical values of g for “CLIMB, CLIMB” or a “DESCEND, DESCEND”?

A

0.25g, aiming for 1500ft/min

18
Q

What are the typical values for g for “INCREASE CLIMB” and “INCREASE DESCENT”?

A

0.35g, aiming for 2500/min to be achieved in 2.5 seconds

19
Q

What are the TCAS inputs?

A

1) Mode S Replies
2) Radio Altimeter
3) ADC for FL
4) IRU for Attitude
5) Flap Position
6) Landing gear position

20
Q

What must an altitude alerting system do?

A

1) alert the crew on reaching a certain altitude

2) alert the crew by at least an aural signal when deviating above or below the selected altitude

21
Q

When is no warning given from the altitude alerting system?

A

Airbus - outside 900ft/ closer than 300ft

Boeing - outside 750ft/ closer than 250ft ..to the selected altitude

22
Q

What happens when you approach a selected altitude?

A

An altitude alert light comes on

23
Q

What happens when you deviate from a selected altitude?

A

A light comes on and a tone is sounded

24
Q

What colour is a traffic advisory in a TCAS 2 ?

A

Yellow/Amber

25
Q

In the case of the remote indicating compass when will the rotor coil have a current induced in it?

A

It will have a current induced unless it is at 90° to the resultant field by which it is surrounded.

26
Q

What type of gyro is used in a remote indicating compass?

A

a tied gyro with two gimbals and therefore 2 degrees of freedom, controlled in topple and drift.

27
Q

Summarise acceleration/deceleration errors in Northern and Southern hemispheres

A

E/W Acceleration: turn towards near pole

E/W Deceleration: turn towards far pole

28
Q

What is the aclinic line?

A

line of no magnetic dip

29
Q

When are turning errors maximum?

A

Turning through North or South

30
Q

When are turning errors zero?

A

Turning through East & West

31
Q

Where would turning errors be worst?

A

Turning errors are function of dip so will be worst at the poles

32
Q

Where would turning errors be least?

A

Turning errors are a function of dip so will be least on the aclinic line

33
Q

How do turning errors vary with bank angle?

A

Turning errors are a function of bank angle so with greater errors at greater bank angles

34
Q

What is the effect of liquid swirl?

A

Lag (increases lag and decreases lead) in all cases

35
Q

what is parallax error

A

error caused by reading something from the side, not looking at it directly

EMB (8 decks)

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