Flight Instruments and Displays

Question 1

If both Capt and FO pitot tubes are inoperative (damaged/blocked), how is airspeed
provided?

Answer 1

Standby airspeed indicator

SH 10.010 pg 8

Question 2

What directly provides inertial position and track data to the associated FMC?

Answer 2

ADIRUs - Air Data Inertial Reference Units

SH 10.010 pg 1

Question 3

Failure flags are used to display system failures on which displays?

Answer 3

PFD’s, NDs, ISFD and stbys

Question 4

What indicates maximum operating speed?

Answer 4

Top red barber pole.

Question 5

Pushing STD on the EFIS control panel does what?

Answer 5

Sets standard baro 29.92

Question 6

Flight path angle is available on the PFD through use of what? How is it toggled ON/OFF?

Answer 6

Flight Path Vector (FPV) Indication via the FPV switch on the EFIS control panel

Question 7

The location of the PFD, ND, and Engine Instrument displays may be moved using switches
on what panel?

Answer 7

Display Select Panel.

Question 8

What are the standby instruments?

Answer 8

Magnetic compass
some have old school instruments:
-Standby attitude indicator 
-Standby altimeter 
-Standby airspeed indicator
Others have an:
-ISFD (digital display)
Some also have:
-Standby RMI
SH 10.010 pg 5

Question 9

What is the difference between the two CDS lights on the PFD and when would you see
them?

Answer 9

CDS MAINT (white) = dispatchable (circuit card failed in either DEU)

CDS FAULT = Non-dispatchable (total DEU failure, two or more cards fail, or one card fails in each DEU)

You would see them on the ground prior to the 2nd engine start
SH 10.010 pg 22

Question 10

Can the Integrated Standby Flight Display operate separate from the electrical system?

Answer 10

Yes. The Battery Pack provides power to the ISFD when power from the Battery
Bus is not available.
SH 10.010 pg 9

Question 11

If the outboard display fails, is automatic switching available? If so, where is the PFD
displayed?

Answer 11

Yes - displayed on the inboard display unit

SH 10.010 pg 30

Question 12

How are maneuver speeds indicated?

Answer 12

Amber band —— = Guarantees 15° of bank before buffet
Between upper and lower amber band - Guarantees 40° of bank before buffet
Maximum Maneuvering speeds: bottom of amber band with flaps up
Minimum Maneuvering speeds: top of amber band
SH 10.020 pg 4, 6, 7, 8

Question 13

How are airspeeds bugged if the FMCs are INOP?

Answer 13

The SPD REF Selector (Outer Knob)

On the Engine Display Control Panel

SH 10.020 pg 9

Question 14

When do the Pitch Limit Indicators populate?

Answer 14

When flaps are extended, OR
High AOA, approaching stick shaker
SH 10.020 pg 12

Question 15

The Expanded Localizer Scale is used to clue a pilot to localizer deviation. What parameters
cause the expanded scale to populate?

Answer 15

1. Autopilot or FD is in LOC mode
2. Deviation is slightly more than one half dot, and
3. Track is within 5 degrees of the MCP-selected course
   SH 10.020 pg 20

Question 16

What is the logic of the Landing Altitude Indication (amber) on the PFD?

Answer 16

Indicates the airport elevation at departure point until 400nm or halfway to your
destination
SH 10.020 pg 32

Question 17

Using the VSD, how would you know that you will achieve a target speed within a certain
distance?

Answer 17

A green dot indicates where the aircraft will achieve the FMC or MCP target
speed at point shown on VSD.
“range to target speed indicator”
SH 10.030 pg 10

Question 18

On the VSD, gates are provided at what altitudes along an approach path?

Answer 18

1000 ft (white) and 500ft (amber) above touchdown zone elevation
SH 10.030 pg 10

Question 19

What causes the Altitude Disagree Alert, and where is it annunciated?

Answer 19

CAs & FOs altitude indications disagree by more than 200ft for more than 5
continuous seconds. ALT DISAGREE will display on both PFDs
(975)

Question 20

What causes the airspeed Disagree Alert and where is it populated?

Answer 20

CAs & FOs airspeed indications disagree by more than 5 kts for 5 continuous
seconds. IAS DISAGREE will display on both PFDs airspeed tape.
(974)

Question 21

AOA integrity is monitored by comparing left and right AOA values. How much disagree
causes a disagree alert?

Answer 21

More than 10 degrees for more than 10 continuous seconds. (976)
AOA DISAGREE will display on both PFDs.