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Aircraft Systems > AS 14 - Transponders > Flashcards

AS 14 - Transponders Flashcards

1
Q

Review Questions

What’s the difference between tracking and homing a navaid?

A

If drift information is available, apply the drift and “track” the navaid.

If no drift is applied, the needle is placed on the nose and the aircraft “homes” the navaid.

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2
Q

What two vital pieces of information do transponders provide?

A

Identification

Altitude

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3
Q

What are the three military Transponder modes currently used in North America?

A

Mode 1 - 2 digit ident code selected on control unit
Mode 2 - 4 digit ident code on selected R/T
Mode 4 - Encrypted challenge and reply code

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4
Q

What are the three civilian Transponder modes currently used in North America?

A

Mode 3/A - 4 digit code (squawk code)
Mode 3/C - 4 digit code and pressure altitude from DADC system (squawk code + altitude)
Mode 3/S - 4 digit code and pressure altitude and other pertinent info (squawk code + altitude + requested info)

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5
Q

There are several predetermined MODE __ codes that apply to all aircraft.

A

MODE 3

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6
Q

What do the following MODE 3 codes mean?

7500
7600
7700

A

Hijack
Comm Failure
Emergencies

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7
Q

What is the name of the transponder on the CT 142?

A

Collins TDR-64/94D

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8
Q

What does the transponder on the CT 142 provide?

A

ATC ID code, AC altitude and the MODE S aircraft unique aircraft code

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9
Q

Where are the antennas for the Collins TDR-64/94D located on the aircraft?

A

Beneath forward fuselage and on top of mid fuselage.

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10
Q

The Collins TDR-64/94D control unit provides the means to set:

A 
ATC squawk codes
Modes of operation
Self test operation
Annunciators; and
Self test diagnostics
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11
Q

What does the Collins TDR-64/94D provide ATC?

A

Altitude and AC identification, as well as specific aircraft info if requested

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12
Q

Describe Mode S for the transponder.

A

Consists of 16 million separate codes giving each AC its own unique identity
Can provide ATC with additional requested data from the FMS (hdg, speed etc)
Can provide data link

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13
Q

Regarding Mode S for the transponder, what does data link provide?

A

Clearances and routing
Weather and maps
Aircrew can acknowledge by the push of a button

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14
Q

True or false

Mode S is an integral component of the TCAS

A

True

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15
Q

What is the Bendix AN/APX 100 (V)?

A

A IFF and a Special Identity Function system and is a combination of civil and military transponders.

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16
Q

In addition to Mode 3/A and C the Bendix AN/APX 100 (V) can also reply to __ , __ and __ interrogations.

A

1, 2 and 4

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17
Q

What is the Traffic Alert and Collision Avoidance System (TCAS)?

A

An automatic collision avoidance system.

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18
Q

How does the TCAS function?

A

It constantly sends out interrogations to any aircraft with at least a Mode A transponder and will automatically respond.

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19
Q

What will the TCAS provide?

A

Either traffic alerts and/or resolution advisories without input from ATC

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20
Q

The CT 142 TCAS requires other aircraft to have at least Mode __ transponder.

A

Mode C

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21
Q

If the IFF system is selected, the TCAS will not be operational because?

A

Mode S is put into standby mode.

22
Q

The TCAS control panel and the corresponding TCAS display is integrated with what?

A

The Vertical Speed Indicator

23
Q

TCAS commanded avoidance maneuvers will most often involve what?

A

A climb or descent

24
Q

What are the principles of operation for the Radio Altimeter?

A

Pulse is transmitted from AC to ground and reflected back
Time taken to complete cycle is measured
Time converted into distance = height

25
Q

A radio altimeter displays what in feet?

A

Absolute altitude

26
Q

What errors does a radio altimeter not contain, unlike a pressure altiemter.

A

Temperature and density errors

27
Q

What are the basic components of a radio altimeter?

A

Receiver / transmitter
Indicator
Antenna system

28
Q

Where are the basic components of the radio altimeter located?

A

Receiver / transmitter located in avionics rack
Two antennas on underside of fuselage
Self test and status light indicators

29
Q

What is the operating range and increments of the CT 142 radio altimeter?

A

0 - 2500 ft @ 10 foot increments

30
Q

What uses the radio altimeter?

A

The GPWS, Flight Guidance Computer, Air Data Computer and Flight Data Recorder

31
Q

What is the name of the Ground Proximity Warning System aboard the CT 142?

A

Sunstrand Mark ll

32
Q

What does the GPWS provide?

A

A visual and synthesized aural voice annunciation

33
Q

When is the GPWS active?

A

Whenever the aircraft is powered (ie. automatic)

34
Q

What are the components of the GWPS?

A 
Computer unit (in avionics rack)
Cockpit speaker and variable annunciator
L and R side PULL UP/ GWPS TEST switch lights (glareshield)
L and R side BELOW G/S (Glide Slope) cancel switch lights (glareshield)
GWPS flap override switch (pilot side console)
The GWPS fail light (master caution panel)
35
Q

The various ground proximity cockpit warnings are activated how?

A

Upon violation of any of the six different flight profile conditions.

36
Q

GPWS Warning Modes - Mode 1

A

Excessive sink rate

37
Q

GPWS Warning Modes - Mode 2A

A

Excessive Closure rate

38
Q

GPWS Warning Modes - Mode 2B

A

Excessive closure rate on landing approach

39
Q

GPWS Warning Modes - Mode 3

A

Altitude loss after take off

40
Q

GPWS Warning Modes - Mode 4A

A

Proximity to terrain, gear up

41
Q

GPWS Warning Modes - Mode 4B

A

Proximity to terrain, flaps up

42
Q

GPWS Warning Modes - Mode 5

A

Descent below glideslope

43
Q

GPWS Warning Modes - Mode 6

A

Descent below radio altitude DH

44
Q

Regarding GWPS, inputs are continually processed to provide airplane flight path surveillance between __ and ____ feet AGL.

A

50 and 2450 ft AGL

45
Q

With the exception of “GLIDESLOPE” and “TOO LOW FLAPS” violations, all other aircraft warnings can only be cancelled how?

A

Taking the corrective action

46
Q

If the aircraft is near the stall speed, what happens to the GWPS and why?

A

The GWPS is inhibited from the stall warning computer during the time the shaker is energized.

47
Q

The GWPS caution light on the caution/ warning lights panel comes on to indicate what?

A

A GWPS malfunction

48
Q

Review Questions

On routine 402 Sqn missions, which is the primary transponder?

A

Collins TDR-94-94A ATC

49
Q

Review Questions

Which SSR mode does the Collins TDR-94-94A ATC use?

A

Mode S

50
Q

Review Questions

Which SSR mode can the Bendix AN/APX 100 use?

A

Military 1,2,4 and civil 3/A and C

Aircraft Systems (19 decks)

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