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Ground School Systems 3 > PC-21 Flight Management System (FMS) Introduction > Flashcards

PC-21 Flight Management System (FMS) Introduction Flashcards

1
Q

What is the primary role of the PC-21 FMS?

A

A backup for managing communication with ATC and retrieving data in case of UFCP or MC failure.

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2
Q

What is the secondary role of the FMS?

A

To functions a secondary NAV source

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3
Q

What are the 3 main functions of the FMS?

A

1) Area Navigation (RNAV)
2) Backup tuning
3) Backup volume control

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4
Q

What provides the FMS with information on waypoints, nav aids and airports?

A

Navigation database.

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5
Q

What is involved in the RNAV function of the FMS?

A

1) Provides flight management capabilities
2) Provides flight management data for civil navigation
3) Provides customer database for storing defined routes/waypoints

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6
Q

What is involved in the backup function of the FMS?

A

1) Backup radio/NAV/transponder tuning

Note: Can only tune the transponder when the MC is not available.

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7
Q

What is involved in the backup volume control?

A

Control the volume levels of backup Radio/Nav/Intercom but ONLY when the MC is not available.

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8
Q

How is the FMS screen + keypad brightness controlled?

A
  • DISPLAYS knob = Screen brightness
  • PANELS knob = keypad brightness
  • BRT key on FMS keypad
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9
Q

How can FMS be switched off?

A

By pressing the FMS button on the ELEC panel

- This turns off both cockpits FMS

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10
Q

Where is the scratchpad on the FMS?

A

The bottom line of the FMS

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11
Q

What does amber indicate on the FMS? What about green?

A 
Amber = Alerting annunciation
Green = Advisory annunciation
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12
Q

What are the two types of function keys on the FMS?

A
  • General function keys

- Page selection keys

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13
Q

Are scratchpad inputs made from one FMS transferred to the other cockpits FMS?

A

Yes

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14
Q

What is primary means of controlling the COMM, VOR/ILS, TACAN and transponder units?

A

MC through the UFCP

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15
Q

Can the FMS dually tune the NAV radios and UHF/VHF radios with the MC?

A

Yes

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16
Q

Can the FMS dually tune the transponder or volume control with the MC?

A

No, only when the MC fails.

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17
Q

What sensors does the FMS receive navigation data from?

A
  • GLSSU providing GPS (primary means)
  • Two VOR/ILS receivers provide bearing data
  • TACAN transceiver supplies DME data
  • ADC provides air data
  • IRS provides position and heading input
  • PFD supplies reversionary SFD data
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18
Q

Where can FMS be displayed?

A

1) FMS display pages

2) PFD, MFD and the HUD

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19
Q

What is the primary display of the FMS data ?

A

HSI in the mad mode on the PFD.

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20
Q

How are the front and rear FMS powered?

A

By the BATT BUS.

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21
Q

On power up, is the rear FMS slaved to the front FMS?

A

Yes

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22
Q

What are the 4 phases of flight that the FMS computes and monitors?

A
  • Enroute
  • Terminal departure
  • Terminal arrival
  • Approach
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23
Q

Does the FMS transition between different phases of flight automatically?

A

Yes

24
Q

When does FMS change between terminal departure to enroute?

A

When radial distance from departure airfield becomes > 33 NM or altitude becomes > 16,000 feet

25
Q

When does FMS change from enroute to terminal arrival phase?

A

When radial distance from destination airfield becomes < 30 NM and aircraft altitude is < 15,000 feet above destination airfield elevation.

26
Q

When does FMS change from terminal approach to approach phase?

A
  • When intercept track angle to the final approach is < 90 deg
  • The aircraft position is within +- 60 deg of the final approach course
  • Approach has integrity
27
Q

What are the 5 NAV modes of the FMS in order of priority?

A

1) GPS through GLSSU
2) DME/DME mode
3) VOR/DME mode
4) IRS mode
5) DR mode

28
Q

What are the RNP and ANP ?

A
  • Required nav performance and actual nav performance

- Actual nav performance must be within limits of RNP for that particular phase of flight, which the FMS calculated.

29
Q

What formula and geodetic mode does the FMS use to calculated nav data?

A

1) Great circle formulae

2) WGS-84 geodetic mode of total earth

30
Q

What overall nav data does the FMS compute?

A

The distance and the required track from the present position to the next waypoint in the active route.

31
Q

Where are active waypoint shown in inverse cyan?

A

LEGS and PROGRESS pages

32
Q

In case of loss of GPS, DME and VOR signals, what does FMS use?

A

Dead reckoning calculations

33
Q

How does FMS switch between different nav sources?

A

Automatically by determining which is most reliable.

34
Q

What does DR mode rely on?

A
  • Heading, TAS and last computer value of wind for navigation.
  • Accuracy will be degraded overtime.
35
Q

How does FMS calculate the TTG to next waypoints?

A

Using current wind and groundspeed

36
Q

Which page are system alerts shown? What colour are they in?

A
  • MESSAGE RECALL

- Yellow

37
Q

What colour are maintenance messages shown?

A

White on MAINT MESSAGES page

38
Q

Where are status advisory messages displayed?

A

On the scratchpad in white.

39
Q

What does an amber FMS MSG on the MFD mean?

A

Where is an FMS system alert.

40
Q

When will FMS MSG annunciators turn off?

A

Once all messages have been used.

41
Q

When do FMS power up?

A

When BATT 1 or BATT 2 have been powered up

42
Q

What pages are used in flight plan creation?

A

1) RTE pages
2) DEP ARR pages
3) LEGS pages

43
Q

What does flight plan creation include?

A

1) Entering of ORIGIN and DEST airport
2) Entering the callsign
3) Waypoint entry
4) Departure and arrival procedure entry

44
Q

What can the FMS be used for in flight?

A

1) Modifying routes
2) Using the FMS holding pattern functions
3) Monitoring the route progress

45
Q

What is a requirement on this course?

A

1) Entering the ORIGIN and DEST airport
2) Entering the FLT NO
3) Both can be entered on the RTE page

46
Q

What buttons would you press if the ORIGIN and DEST airport for a flight are identical?

A

1) Press the ORIGIN LSK

2) Then press the DEST LSK

47
Q

How can flight number be changed?

A

By typing the new callsign into the scratchpad followed by pressing the FLT NO LSK

48
Q

What should be done after entering the ORIGIN and DEST airport? Which page is this done through?

A

Waypoints should be created through the LEGS page

49
Q

What are the 3 priority sources for altitude data?

A

1) Barometer corrected altitude
2) Pressure altitude
3) GPS altitude

50
Q

On FMS RADIO page, what colours do Cyan, Yellow and Green indicate?

A 
Cyan = active and valid
Yellow = active + invalid
Green = standby
51
Q

What does an ALTITUDE FAIL! system alert mean?

A

Primary ADC sourced input of barometer corrected and pressure altitude is lost

52
Q

What does an amber FMS FAIL caution message on the MFD mean?

A

1) FMS has failed
2) FMS data is not correct
3) FMS is selected to OFF

53
Q

What does PROGRESS page display?

A

Current RNP, ANP, PFD HIS scale and ETA for each waypoint.

54
Q

What is the bottom line of the FMS display known as?

A

Scratchpad

55
Q

Do the front and back FMS operate in tandem?

A

Yes

Ground School Systems 3 (17 decks)

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