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Typkurs Saab 340 Week 4 > ATA 34 - Navigation Systems > Flashcards

ATA 34 - Navigation Systems Flashcards

1
Q

From where do the flux detector get power?

A

From its on side AHRS (AC power)

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2
Q

What are the ranges of the WXR and Flight Plan on the EHSI (Sector Mode)

A

WXR = 300 nm
Flight Plan = 600 nm

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3
Q

What do you do if an electronic flight display fails?

A

Operate the 3-position switch on either side. This is to cause a display transfer of the screens to form format HSI REV/ADI REV.

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4
Q

What do you do if an AHRS input data failure on the DPU occurs?

A

Operate the 3-position switch on either side to the XSIDE DATA position.

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5
Q

Where do the corrected altitude on the altitude indicator get registred when correcting it manually?

A

It will go to the pre-selector, thereafter to the ADC and then back to the altitude indicator

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6
Q

How many DC fans are installed in the EFIS system?

A

7 ea (9 ea if MFD is installed)

  • One fan under each EHSI (4 ea total)
  • One fan beside the LH EADI to supply cooling air to a hot spot between LH EADI and LH ASI. (1 ea)
  • Underneath each DPU (2 ea)
  • (If MFD installed, 1 ea fan is installed under the MFD and 1 ea fan under the MPU)
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7
Q

What do you need to remember when you replace an EADI?

A

You need to remove the inclinometer. When installing it again, the A/C needs to be levelled.

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8
Q

How many air data systems are there in the A/C?

A

3
- LH (electronic)
- RH (pneumatic)
- STDBY

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9
Q

How do the crew know there is a RAD ALT fail?

A

A red and flashing box “RA” (flashing first and then go steady) in the lower RH corner on EADI

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10
Q

How do you test the ADC?

A

On the Test 2 panel or on the ADC itself.
When testing on Test 2 Panel an additional VMO test is performed (with caution light and chimes)

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11
Q

What is Saab 340’s VMO?

A

250 knots

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12
Q

What is the maximum pitch movement of the magenta command bars?

A

±15°

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13
Q

How do you test the MFD system?

A

On Test 2 panel EFIS 1 test

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14
Q

Which information can be presented on the MFD?

A
  • Weather radar data information
  • Navigation information
  • Page data (checklists, etc.)
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15
Q

What signals goes to the MFD?

A

The same signals as to the DPU:s

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16
Q

How many AHRS are there in the A/C?

A

2 separate but identical AHRS (system 1 and system 2)

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17
Q

What’s the AHRS primary function?

A

To provide roll, pitch and stabilised magnetic heading information for use by displays and the autopilot.

(In addition, it provides body axis angular rates and linear acceleration outputs)

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18
Q

Which unit is used in the AHRS to sense the horisontal component of the earth’s magnetic field?

A

The Flux Detector Unit (FDU). 1 unit installed in each wing. This data is sent to the attitude and heading computer

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19
Q

What happens when you push the HDG Slave Pushbutton?

A

This will force the AHC to update in accordance with
the actual flux detector signal.

(HDG Slave is inhibited with autopilot engaged)

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20
Q

How long does it take to power up the AHC (Attitude Heading Computer)? What do you need to remember during this start-up?

A

It will take approx 70 seconds and the aircraft must not be moved during this period.

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21
Q

What is important to remember when replacing an Attitude Heading Computer (AHC)?

A

That the ICU needs to remain in the aircraft on the same position.

22
Q

Where is the Airspeed sensor located and to where does it feed its information?

A

It is located under the LH Audio Control Panel.
It feeds its information to AHRS and Rudder Limiter

23
Q

When is it possible to do a Stimulus Test and where is STIM presented during the test?

A

Stim test mode is only possible during weight on wheels.
The word STIM is displayed on EFIS (EADI)

24
Q

AHRS 1 is supplying more units than AHRS 2. Which units are exclusively supplied with information form AHRS 1?

A
  • Weather Radar System
  • FDAU (FDR)
  • FMS
  • EGPWS
25
Q

Which RMI receives heading data from AHRS 2?

A

RMI 1 (LH). The RMI:s are cross-connected.

26
Q

When do the warning flag appear in the Standby Horizon Indicator?

A
  • If loss of electrical power
    or
  • If the instrument gyroscope is not up to speed
27
Q

How many FCC (Flight Control Computer) are installed in the A/C?

A

1 ea

28
Q

Which three antenna inputs do the NAV Receivers require?

A
  • VOR/LOC dual antenna
  • G/S dual antenna
  • MB antenna (only used for the NAV receiver 1)
29
Q

In which range do the DME transmit?

A

1025-1150 mHz

30
Q

How do you test the DME?

A

On the test button on the NAV control panel

31
Q

Which system needs MODE-S (transponder) to function?

A

TCAS

32
Q

How many antennas are installed in the ADF system? (Both single and dual installation)

A

One dual antenna
(With the dual ADF installation the Dual Antenna installation is utilised by both systems.)

33
Q

How many channels can the GPS sensor receive?
How many channels are needed to calculate a three dimansional position?

A

12 channel receiver
the three best satellites

34
Q

Where can you see that the FMS has received a message?

A

An indication on the WPT/MSG legend

35
Q

When will the WPT legend come on?

A

approximately 15 seconds before a leg change.

36
Q

From where do the FMS receives inputs?

A
  • Air Data System
  • AHRS
  • DME
  • VOR
  • Fuel flow and used system
  • GPS
  • Landing gear extension and retraction system
37
Q

Where do the FMS outputs go?

A
  • The VOR system
  • EFIS
  • Flight Director System
38
Q

Which systems are the Independent Determining Systems?

A
  • Radio Altimeter
  • Weather Radar
  • TCAS
39
Q

Up to what height can the Radio Altimeter function?

A

Up to 2500 feet

40
Q

How do you test the Radio Altimeter?

A

By pressing the RA TST button on the Pilot’s or Co-pilot’s Display Control Panel (DCP) located on the centre glareshield panel

41
Q

How many Radio Altimeter Antennas are installed in the aircraft and where are they located?

A

2 ea. Under the aircraft belly. (one is for receive and one is for transmit)

42
Q

Where is the RAD ALT presented?

A

On the EADI - RH bottom corner.

43
Q

Why is an Aircraft Installation Delay (AID) bias needed in the Radio Altimeter Transmitter/Receiver?

A

Due to the unit installed in more A/C types than Saab 340. It is installed to compensate for the antenna cable length and antenna height above ground.

44
Q

In which colours are the ground features coloured?

Weather Radar

A

(black), cyan, yellow and magenta

45
Q

How long is the warm up time for the weather radar?

A

60-80 seconds

46
Q

To where do the weather radar control panel provide the weather data?

A

To the two display processor units (DPU) and to the multifunction processor unit (MPU) if it is installed.

47
Q

1: What is the WXR tilt range?
2: What is the WXR sweep range? (Azimuth circuit)

A

1: 30° (± 15°)
2: 120° (± 60°)

48
Q

Symbols on the VSI?

A
  • Resolution advisory (RA): shows as a solid red square and recommend a resolution to prevent a
    collision developing.
  • Traffic advisory (TA): shows as solid yellow circle and calls attention to threatening aircraft.

The VSI/RA/TA can also detect and display other nearby traffic:
- Proximity traffic (PT) shows as a solid cyan diamond.
- Other traffic (OT) shows as an open cyan diamond.

49
Q

The VSI has two pushbuttons.
Which ones and what do they do?

A
  • M button: Full time or Part time traffic mode
  • R button: To select the range of the traffic display (6 or 12 nm)
50
Q

When is TA ONLY selected on the TCAS control unit?

A

Example: Engine failure. This mode will inform other A/C that your aircraft is degraded and may not be able to follow an RA command.

51
Q

What info do we get from the GPS?

A
  • three dimensional position
  • velocity
  • time
    -status data.

Typkurs Saab 340 Week 4 (3 decks)

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