PC-21 Heads Up Display (HUD)

Question 1

Where is the brightness control for the HUD?

Answer 1

Mounted on the UFCP.

Question 2

Where is the HUD Symbol Generator (HSG) located?

Answer 2

In the avionics bay

Question 3

What supplies signals to the HUD?

Answer 3

Hud Signal Generator (HSG)

Question 4

What is the HUD signal generator connected to?

Answer 4

The MC

Question 5

What does the Hud signal generator do?

Answer 5

• Processes data from the aircraft systems in accordance with the instructions from the MC and then generators the HUD symbology.
• Sends copy of signal and video to PMM.

Question 6

What is displayed on the HUDR?

Answer 6

• Displays an image of the outside world generated from the video camera in the front cockpit
• Overlays HUD symbiology ontop of that video camera.

Question 7

How are the HUD, HUDR and HUDR powered?

Answer 7

• HSG and HUDR are powered by 28V DC from the GEN 1 BUS.

- The HUD is powered by a direct supply from the HSG only.

Question 8

How can the HUD be selected through different modes?

Answer 8

• Through UFCP switches

- Through HOTAS switches

Question 9

What are the different HUD modes?

Answer 9

1. NAV - en-route NAV or approach Nav
2. Air to ground mode
3. Air to air mode

Question 10

What does the Flight Path Marker (FPM) show?

Answer 10

• The true flight path of the aircraft

- Also known as the velocity vector.

Question 11

What does the horizontal distance between the FPM and the CDM show?

Answer 11

Drift angle.

Question 12

When is climb dive marker displayed by default?

Answer 12

When groundspeed > 60 kts

Question 13

What does the CDM indicate?

Answer 13

The true representation of the flight path in pitch.

Question 14

What would you read off of to indicate the aircraft climb or dive angle?

Answer 14

The CDM against the Climb Dive Ladder (CDL)

Question 15

What is the PRS and how can it be selected on/off?

Answer 15

• Pitch Reference Symbol
• Only available in NAV mode
• Can be selected on/off through UFCP
• Replaces CDM marker.

Question 16

What is the Climb Dive Ladder (CDL)?

Answer 16

Provides a reference of the climb or dive angle when read in conjunction with the CDM.

Question 17

When is the Climb Dive Ladder a pitch ladder?

Answer 17

When CDM is caged and the PRS is displayed.

Question 18

What shows the aircraft’s current heading on the HUD?

Answer 18

By a lubber line

Question 19

What does an inverted triangle pointer indicated?

Answer 19

The selected heading

Question 20

What does the inverted T pointer indicate?

Answer 20

The current ground track.

Question 21

How can the HUD be referenced to TRUE or MAGNETIC

Answer 21

Through PFD switch.

Question 22

Is the airspeed shown below 40 KIAS on the HUD?

Answer 22

No

Question 23

When is Mach number displayed on the HUD? When is it removed?

Answer 23

• When mach number increases through 0.40 it displays

- Removed when mach number reduces through 0.35

Question 24

How can TAS, GS or KIAS be changed on HUD?

Answer 24

Through PFD Bezel

Question 25

What barometric setting is the displayed HUD altitude based off of?

Answer 25

The front PFD barometric setting.

Question 26

What are the limits of the angle of attack scale ON hud?

Answer 26

-5 TO 30

Question 27

What is AOA scale displayed on the HUD?

Answer 27

When landing gear is selected down.

Question 28

What is the scale of the vertical speed reference bar?

Answer 28

250 ft/min for smaller lines | 1000 ft/min for larger lines

Question 29

What controls the appearance of the VSI on the HUD?

Answer 29

UFCP - OFF - VSI is never displayed - ON - VSI is always displayed - AUTO - the VSI is only displayed when the landing gear is selected down and disappears hen the landing gear is selected up.

Question 30

What on the HUD gives an indication of aircraft acceleration or decelleration?

Answer 30

Power chevrons relative to climb dive marker.

Question 31

What is radar altitude resolution > or < 200 ft?

Answer 31

< 200 ft to 1 ft | > 200 ft to 10 ft

Question 32

When is HT value displayed on the HUD?

Answer 32

- When it has been set initially | - When the RA is below the HT

Question 33

What displays when the AP is engaged?

Answer 33

Asterisk

Question 34

Is a caution displayed on HUD if A/C is over g'ed?

Answer 34

No

Question 35

What is available on the HUD when MC is selected as the primary NAV source?

Answer 35

Steer point diamond.

Question 36

What does an E or an L next to the time in the bottom right hand corner of the HUD indicate?

Answer 36

Either Early or Late Time on target.

Question 37

What does the speed carrot mean?

Answer 37

The speed that should be flown to get to time on target.

Question 38

What indications are shown on the HUD when ILS 1/ILS 2 are shown on the HUD?

Answer 38

1. Localizer indications 2. Glideslope indications 3. Flight Direction (FD) box 4. Excessive deviation arrows.

Question 39

What are the two declutter levels available in the NAV mode?

Answer 39

1. Through UFCP | 2. By pressing the PCL weapon mode switch to toggle through DCL OFF, DCL 1 or DCL 2 levels.

Question 40

How are the HUD formats modified or selected through?

Answer 40

Through UFCP

Question 41

Does the HUD show EICAS or DWP indications?

Answer 41

No

Question 42

What does an amber CHECK NAV annunciation mean on the MFD?

Answer 42

Inertial Reference System failure

Question 43

What will occur if there is an air data computer failure?

Answer 43

1. Airspeed 2. Altitude 3. Mach

Question 44

What occurs if there is an engine flameout?

Answer 44

Electrical power is removed from the HUD and no symbology is displayed anymore

Question 45

Should the HUD be used if a data failure is apparent?

Answer 45

No