Flight Instruments And Displays

Question 1

How many knots in height is the command speed pointer on the PFD?

Answer 1

5kts

Question 2

What minimum maneuver capability is provided at the top of the amber bar on the PFD airspeed display

Answer 2

Minimum maneuver speed (1.3Vs)

Question 3

What occurs at the minimum speed display (red) on the PFD

Answer 3

Stick shaker or low speed buffet occurs (1.1Vs)

Question 4

When is the Pitch Limit Indication (PLI) displayed

Answer 4

Flaps are out of UP
- pitch attitude that will cause stick shaker

Question 5

When is the radio altitude displayed on the PFD

Answer 5

When Radio Altitude (RA) is below 2500ft AGL
- Displays and is boxed white for 10 sec passing below 2500
- unless RA mins set: remains white until below minimums set, then turns amber below set min

Question 6

Where are the marker beacon annunciations displayed?

Answer 6

Top right corner of the ADI (artificial horizon)
OM - Cyan
MM - Amber
IM - White

Question 7

How do the glide slope and localizer pointers on the PFD indicate excessive glide slope or localizer deviation

Answer 7

The scale turns amber and the pointer flashes to indicate excessive deviation

Question 8

How do you know when you are 1/3 of a dot deviation form the localizer

Answer 8

Localizer pointer is just touching the rectangle during expanded localizer deviation scale

Question 9

Where does the altitude you select in the altitude window in the MCP display on the PFD, what color?

Answer 9

Above the altitude tape in magenta (also depicted with pointer on the tape)

Question 10

Where is current track displayed on the ND

Answer 10

Top center of the ND (TRK)

Question 11

How can you control displays if the EFIS control panel fails

Answer 11

Line selection on the EFIS CONTROL pages on the CDU

Question 12

Describe the PLN mode on the ND mode selector

Answer 12

• True North up
• Norm use preflight or wanting to view graphic of entire route

Question 13

What systems failure would result in the NAV source Selector position to CDU L (captains panel) and CDU R (FO’s panel)

Answer 13

Both FMC’s have failed
- this enters into alternate navigation
- allows CDU to provide route guidance to finish flight in progress
- limited functions

Question 14

Which source selector switch determines which localizer and glide slope receivers provide information to the respective PFD and ND

Answer 14

EIU source selector

Question 15

What does EIU mean?

Answer 15

EICAS/EFIS Interface Unit
- 3 L, R, C
- Norm Auto
- selects operable for PFD or ND

Question 16

Which IRS source provides auto brakes reference

Answer 16

Captains side provides IRU reference for auto brakes

Question 17

What source selector would you likely move in the event of an ALT or SPD flag in view of the PFD

Answer 17

Air data source selector

Question 18

How can you control displays if the display select panel fails

Answer 18

CDU EFIS control

Question 19

The Pitot static system provides pitot and static pressure to which aircraft systems

Answer 19

• 2 ADC’s (air data computers)
• Standby Airspeed indicator
• Standby Altimeter
• Elevator feel computer

Question 20

Explain the course of air through the pitot static system as it enters the pitot static tubes and ports all the the way through to the displays

Answer 20

• 4 tubes
• upper pitot goes to the associated ADU’s L&R
• upper static goes to Associated ADU and opposite lower static
• aux static goes to opposite lower aux static
• lower L pitot goes to Elevator Feel and Integrated Standby flight display
• Lower R pitot goes to Elevator feel computer
• Elevator Feel Computer has two static ports
• Integrated Standby Flight Display has two alternate static ports