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self study > Flight Management/Navigation > Flashcards

Flight Management/Navigation Flashcards

1
Q

What are the components of the FMS?

A

Flight management computer system
Autopilot/FD System
Auto throttle
Inertial reference system
GPS

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2
Q

How many receivers does the GPS have?

A

2 independent receivers

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3
Q

What does the GPS annunciator light mean without recall?

A

Failure of both GPS sensor units

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4
Q

What does the GPS annunciator light mean with recall?

A

Failure of single GPS sensor

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5
Q

What does moving the display selector to TEST do?

A

Tests all lights in data display

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6
Q

What does HDG/STS indicate?

A

L window - heading
R window - applicable maintenance status codes

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7
Q

What does pressing an alpha key do?

A

Arms keyboard for numeric entry to data display

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8
Q

What can the numeric keys be used for with mode selector in ALIGN?

A

manual entry of PPOS

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9
Q

What can the numeric keys be used for with mode selector in ATT?

A

permits magnetic heading entry

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10
Q

What does the ON DC light mean and is there a MC?

A

AC power abnormal, IRS operating on dc power from switched hot battery bus

MC for IRS

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11
Q

If the ON DC light illuminates on the ground, what will also happen?

A

ground call horn will sound from the nose wheel well

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12
Q

When would a momentary illumination of the ON DC light be expected?

A

During alignment self test

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13
Q

What will happen if the right IRS is on DC power?

A

Power will be removed in 5 minutes

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14
Q

What does the DC FAIL light indicate?

A

DC power for the related IRS is not normal. If all other lights are extinguished, IRS is operating normally on AC power

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15
Q

What does it mean if the Navigation source transfer switch is in NORMAL?

A

Attitude and heading source is the default IRS

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16
Q

What two systems does the ADIRU use?

A

Air data system and IRS system. Air data system includes a pitot tube and 2 static ports.

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17
Q

What do the IRS systems consist of?

A

3 laser ring gyros and accelerometers

18
Q

Where is the IRS heading and attitude information sent?

A

To flight deck PFD displays

19
Q

What does a CDU message of VERIFY POSITION mean?

A

lat/long not within 4nm of origin airport

20
Q

What does a CDU message of ENTER IRS POSITION mean?

A

Entered lat/long does not pass IRS internal comparison test

21
Q

Within what range of latitude can normal alignment be made by using MSU switch from OFF to NAV?

A

within 78deg 15’ N/S

22
Q

Within what range of latitude is magnetic variation stored in the IRS?

A

within 82deg N/S

23
Q

What does a steady ALIGN warning light mean?

A

Respective IRS in align mode, initial ATT mode or shutdown cycle

24
Q

What does a flashing ALIGN warning light mean?

A

Alignment could not be completed due to:
-Significant discrepancy between entered and previous position
-Present position unreasonable or none entered

25
Q

What does it mean if the ALIGN warning light is extinguished?

A

IRS not in align mode

NAV - alignment completed, all IRS information available
ATT - Attitude information available and heading information available after entry of initial mag heading

26
Q

What does a FAULT light indicate on the IRS panel?
Is there a MC?

A

a fault exists in NAV or ATT mode

MC for IRS

27
Q

Which bus powers the L IRS?

A

AC standby bus

28
Q

Which bus powers the R IRS?

A

AC XFR bus 2

29
Q

What is the back up power for the L and R IRS

A

DC switched hot battery bus

30
Q

Which bus does the IRS use for initial alignment?

A

Battery bus

31
Q

What would cause the IRS to lose alignment?

A

Loss of both AC and DC power

32
Q

If IRS alignment is lost inflight, what information is no longer available?

A

Present position and GS

33
Q

If IRS alignment is lost inflight, how can attitude information be restored?

A

Selecting mode to ATT with 30seconds of straight and level

34
Q

What will happen if the IRS is switched to OFF?

A

Remains powered for 30 seconds. ALIGN light illuminated for 30 until completely shut down

35
Q

If either IRS is not in nav, what will not be available?

A

Autopilot
HUD Approach AII, AIII modes
Autobrakes
CATII, CATIII

36
Q

How does the FMC update position?

A

FMC autotunes to DMEs or a co-located VOR/DME

37
Q

How many DME frequency scanning systems are there?

A

2

38
Q

Which ILS receiver does the ISFD display?

A

No 1 ILS receiver

39
Q

What does the ALT source switch on the transponder do?

A

Selects the relevant air data computer for altitude reporting

40
Q

What does having FMC source set to NORMAL mean?

A

L FMC controls CDU’s and provides autothrottle input. R FMC operates in sync with L FMC

41
Q

Which FMC manages radio autotuning for position updating?

A

Primary FMC

42
Q

If autotuning is not available, how does FMC determine position?

A

IRS position reference, may effect RNP

self study (12 decks)

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