10 - Flight Instruments, Displays

Question 1

1. What is the purpose of the Display Processing Computers (DPCs)?

Answer 1

Interface with aircraft subsystems and sensors to collect data, process it, and display it on the Flight Deck DUs

Question 2

2. How are outboard Display Unit failures automatically handled?

Answer 2

The displays will automatically reconfigure to ensure that each pilot has a PFD and that an Engine Display is shown

Question 3

3. How are the standby instruments provided airspeed and altitude information?

Answer 3

Pneumatic pressure data provided by direct connections to the aux pitot and alternate static sources

Question 4

4. How is inertial position and track data provided to the FMC?

Answer 4

ADIRUs

Question 5

5. How is maximum operating speed indicated on the PFD?

Answer 5

Red and black bar
Lower of:
-Vmo/Mmo
-landing gear placard speed
-flap placard speed

Question 6

6. What does the VNAV speed band on the PFD indicate?

Answer 6

FMC target speed during VNAV PTH descents.

-Top of band = VNAP PTH changes to VNAV SPD
-Bottom of band = A/T wake-up speed

Question 7

7. When do the Pitch Limit Indicators (PLIs) display?

Answer 7

-When the flaps are extended, or
-At slow speeds even with flaps up

Question 8

8. How is flight path angle and drift angle displayed on the PFD?

Answer 8

By selecting FPV on the EFIS control panel

Question 9

9. How is standard pressure set on the altimeter?

Answer 9

By pushing STD on the BARO knob of the EFIS control panel

Question 10

10. What does the ALT DISAGREE alert indicate?

Answer 10

CA & FO altitudes disagree by more than 200 ft for more than 5 seconds

Question 11

11. What does the IAS DISAGREE alert indicate?

Answer 11

CA & FO airspeeds disagree by more than 5 kts for more than 5 seconds

Question 12

12. What does the AOA DISAGREE alert indicate?

Answer 12

CA & FO AOA values disagree by more than 10 degrees for more than 10 seconds

Active above 400 ft RA

Question 13

13. What does the solid green dot along the vertical flight path vector of the Vertical Situation Display (VSD) indicate?

Answer 13

This solid green dot is called the Range to Target Speed Dot (RTSD), and indicates where the aircraft will achieve the FMC or MCP target speed.

EXTRA CREDIT:
If the dot is unfilled and placed at the edge of the display, the speed will not be achieved within the display area.

Question 14

14. At what altitudes are decision gates on the VSD provided?

Answer 14

1000’ AFE (white) and 500’ AFE (amber)

Question 15

15. How is the HGS system controlled?

Answer 15

A menu within the MCDU

Question 16

16. What standby instrument(s) are available?

Answer 16

• Standby magnetic compass
• ISFD which includes;
  
  • Attitude
  • Airspeed
  • Altitude
  • Heading
  • Loc/GS

Question 17

17. How is the Integrated Standby Flight Display (ISFD) powered?

Answer 17

An independent battery pack charged by the battery bus.

EXTRA CREDIT: this battery pack can power the ISFD for approximately 150 minutes with the BAT switch ON. Turning the BAT switch OFF removes all power from the ISFD.

Question 18

18. Which displays utilize failure flags to display instrument failures?

Answer 18

PFD