Automatic Flight / FMC

Question 1

How do you re-engage the auto throttles when the pitch mode is VNAV / FLCH SPD when the A/T flight mode annunciation is blank

Answer 1

• Cycle the A/T ARM switch to OFF then back to ARM

Question 2

How do you re-engage the auto throttles when the pitch mode is ALT, V/S or G/S

Answer 2

Push the SPD switch

Question 3

How could you select climb thrust after takeoff or go-around?

Answer 3

• at the programmed thrust reduction altitude or flap setting the FMC changes the reference thrust to the armed climb limit
• for manual CLB selection press THR switch

Question 4

What speed is set in the IAS/MACH window and the PFD when power is first applied to the airplane

Answer 4

200kts

Question 5

The outer Bank Limit selector applies which roll mode?

Answer 5

HDG SEL

Question 6

When the LOC course is captured what is displayed in the Heading window

Answer 6

LOC inbound course

Question 7

How can you de-select the approach mode AFTER localizer and glide slope captured

Answer 7

• TOGA
• Autopilot and both FD switches OFF

Question 8

With the APP switch pushed at what intercept track angle does the AFDS capture the LOC

Answer 8

• 120deg of LOC course

Question 9

At what alt are the autopilot systems powered by seperate sources with 3 autopilots engaged

Answer 9

Below 1500ft

Question 10

Can the glide slope be captured prior to LOC intercept

Answer 10

No, G/S inhibited until LOC capture (and intercept w/n 80deg of LOC course

Question 11

What does an amber horizontal line displayed through the affected ACTIVE pitch or roll mode indicate

Answer 11

A flight mode fault is detected

Question 12

How many pushes of the autopilot disengage switches on the control column would you make to disengage all autopilots

Answer 12

One to disengage
Second push clears the warnings

Question 13

When the TO?GA is pushed for go-around on approach what auto throttle mode would be displayed on the flight mode annunciation, if the A/T is armed?

Answer 13

THR

Question 14

What climb rate is achieved during a go-around with TO/GA pushed

Answer 14

2000fpm

Question 15

What auto throttle mode is activated with the second push of the TO/GA switch

Answer 15

THR REF (full Go-around mode)

Question 16

What AFDS status annunciation displays above the attitude display on the PFG when the autopilot i engaged

Answer 16

CMD

Question 17

When does VNAV activate

Answer 17

400ft above the runway elevation on Take off

Question 18

When is VNAV deactivated

Answer 18

When another pitch mode becomes active
- FLCH, V/S or ALT
- G/S capture

Question 19

What auto throttle flight mode annunciation would you have when using FLCH SPD in a descent to include subsequent altitude capture

Answer 19

THR -> HOLD in descent
When altitude captured HOLD -> SPD

Question 20

When power is first applied to the airplane what altitude is displayed in the MCP altitude window and the PFD

Answer 20

10,000ft

Question 21

How are autothrottle roll and pitch mode changes emphasized on the FMA’s

Answer 21

Green box around the mode for 10 seconds

Question 22

Will the autothrottles operate if you dont push TOGA for takeoff by 50kts? If not will they operate?

Answer 22

• No
• the autothrottles will automatically engage above 400ft when VNAV captures

Question 23

How can you disarm VNAV, LNAV, LOC and APP modes when armed

Answer 23

Push to deselect

Question 24

Which PFD annunciation is associated with a fail operational automatic landing?
Which is fail passive?

Answer 24

LAND 3 - fail operational
LAND 2 - fail passive

Question 25

Which pitch mode does not provide autothrottle speed protection

Answer 25

V/S mode

Question 26

When does LNAV activate when armed

Answer 26

- 50ft above the runway on T/O - w/n 2-1/2 miles of course

Question 27

When does rollout mode activate

Answer 27

Below 5 ft

Question 28

What controls are used by the AFDS to steer the airplane on the localizer centerline after touchdown

Answer 28

Rudder and nosewheel steering

Question 29

What initial pitch attitude is commanded by the flight director when the flight director is turned on on the ground

Answer 29

8deg

Question 30

Inflight when is TO/GA armed

Answer 30

Flaps out of UP or G/S capture

Question 31

If a VNAV descent is initiated prior to T/D what is the pitch mode

Answer 31

VNAV SPD

Question 32

Describe the condition that would cause VNAV ALT to display th pitch mode?

Answer 32

A conflict exists between the VNAV profile and the MCP altitude

Question 33

When does flare mode activate during auto land

Answer 33

50ft RA

Question 34

When do the autopilots start the flare maneuver

Answer 34

50ft RA

Question 35

When do the autothrottles retard to idle during the the auto land?

Answer 35

25ft RA

Question 36

When does FLARE de-activate

Answer 36

At touchdown

Question 37

During autoland what action disconnects the autothrottles

Answer 37

Thrust reverser lever is raised to reverse idle

Question 38

What conditions would cause the autothrottles to disconnect and subsequently cannot be reconnected

Answer 38

- both FMC fail Or - two or more engines shut down

Question 39

Can the autothrottles be reconnected if the FMC master switch is switched

Answer 39

Yes

Question 40

During takeoff, when TO/GA is selected which autothrottle mode is active

Answer 40

THR REF mode

Question 41

When does the autothrottle annunciation change to HOLD during takeoff

Answer 41

At 65kts indicated airspeed

Question 42

When is barometric altitude recorded by the FMC during takeoff

Answer 42

As the aircraft accelerates through 100kts

Question 43

At liftoff with TO/Ga as the roll mode what roll command is maintained

Answer 43

Ground track at lift off

Question 44

If an engine failure occurs on the ground what is the pitch command target speed at liftoff

Answer 44

V2 to V2+10kts

Question 45

At acceleration height what speed commands are established by pitch as the flaps are retracted

Answer 45

5kts below placarded speed of commanded flap position - flaps up accelerates to VNAV climb speed which is greater of Transition speed (usually 250kts) or Flaps up manuvering plus 20 (VREF+100kts)

Question 46

When is TO?GA mode terminated after takeoff?

Answer 46

- either when the pilot manually selects another pitch or roll mode, or when the armed LNAV/VNAV mode becomes active during the climbout - roll mode changes to LNAV climbing through 50ft or HDG sel through 400ft pitch mode changes to VNAV through 400ft

Question 47

When does the autopilot control the rudder during multi AP approaches

Answer 47

Below 1500ft

Question 48

At what two altitudes will runway alignment occur during multi A/P approaches during crosswinds with all engines

Answer 48

- 500ft - 200ft

Question 49

How does the A/P maintain runway alignment if an engine failure occurs - Prior to approach - during multi A/P approaches? If during an approach

Answer 49

- AFDS introduces a slide slip at 1300ft agl - wings level is established when engine failure is detected

Question 50

What pitch is commanded by the AFDS when TO/GA is pushed in a windshear recovery on approach

Answer 50

Pitch up if 15deg or slightly below pitch limit indicators which ever is lower

Question 51

How does the automatic flight control system provide stall protection

Answer 51

Prevents speed reduction below the minimum maneuvering speed

Question 52

Describe the flight envelope speed protection

Answer 52

AFDS provides stall and overspeed protection

Question 53

What speed protection margin is used by the AFDS in max operating, flap placard speed, and gear extended speeds

Answer 53

- FMC provides min and max speeds for auto flight - minimize transient speed overshoots of: maximum operating, gear extend, or flap placard - undershoot of flaps extended minimum speed - FMC uses a 5kt margin

Question 54

What two conditions prevent the AFDS and autothrottle from providing speed protection

Answer 54

1. V/S mode active 2. Engine failure above maximum engine out alt