Flight Controls

Question 1

What are the three operating modes of the Primary Flight computers?

Answer 1

Normal
Secondary
Direct

Question 2

When do the Ailerons operate?

Flaprons?

(Low vs high speed flight)

Answer 2

Ailerons- Low speed only

Flaperons- Both

Question 3

How are the Ailerons and Flaperons powered?

How many sources?

Answer 3

Hydraulic

Each has two soures

Question 4

Do the spoilers operate symmetrically when augmenting roll control?

Answer 4

No

Question 5

Which spoilers are only available during low speed operation?

Answer 5

Spoilers five and ten

Question 6

Does the Aileron trim operate with the autopilot engaged?

Answer 6

No, it’s inhibited

Question 7

How is the rudder powered?
How many sources?

Answer 7

Hydrolic
Three different PCUs, each powered from a different Hydrolic source

Question 8

Does the aircraft have a Yaw Dampener?

Answer 8

No, it is controlled via the Rudder PCUs

Question 9

Is there a time when you might not have yaw dampening?

Answer 9

In secondary mode for certain multiple failures

In direct mode

Question 10

Is there a separate rudder ratio unit?

Answer 10

No- it’s controlled by the primary flight computers

Question 11

When would you see the “STAB GREENBAND” EICAS?

Answer 11

If the nose gear oleo pressure switch disagrees with the FMC computed green band

Question 12

PFC

Answer 12

Primary Flight Computer

Question 13

ACE

Answer 13

Actuator Control Electronics

Question 14

PCU

Answer 14

Power Control Unit

Question 15

How many spoiler panels are there?

Answer 15

14

Question 16

Pitch trim-which has priority, control wheel pitch trim commands or Alternate pitch trim (pedestal levers) commands?

Answer 16

Alternate Pitch trim commands

Question 17

What are the three modes of flap operation?

Answer 17

Primary (hydraulic)
Secondary (electric)
Alternate (electric)

Question 18

What dos over speed protection inhibit?

Answer 18

Nose down trim.

Question 19

What bank angle protection kicks in at greater than 35° of bank?

Answer 19

Control wheel force will roll the airplane back to within 30°of bank

*can be over-ridden

Question 20

What does the stall warning consist of?

Answer 20

A stick shaker, NO AUAL Warning

Question 21

What is the lowest speed that the airplane can be trimmmed to?

Answer 21

Minimum Maneuvering Speed

Question 22

Will the auto throttle automatically active at low speed?

Answer 22

Yes, at or near stick shaker it will active in the appropriate mode (SPD or THR REF)

Question 23

When will the A/T not automatically engage? (3 times)

Answer 23

-Pitch mode is FLCH or TOGA
-at or below 400’ AFE on T/O
-at or below 100’ RA on approach

Question 24

When is A/T stall protection not supported?

Answer 24

In VNAV SPD mode

Question 25

When with the Thrust Asymmetry Compensator (TAC) engage?

Answer 25

Thrust differences of 10% or more

Question 26

When is the wheel to rudder crosstie function active and what does it do?

Answer 26

-Below 210 knots -Control wheel inputs deflect the rudder up to 8°

Question 27

What’s are the FSEUs

Answer 27

Flap and Slat Electronic Units

Question 28

What do the “Krueger Flaps” do?

Answer 28

Form a seal between the engine and the inboard slat

Question 29

When does Flap Load Relief operate? What do the flaps move to and is there a limit?

Answer 29

-For flaps 15 through 30 -The Flaps retract to a position adequate for the speed limited to Flaps 5

Question 30

When flap load relief activated will the flaps later “re-extend”?

Answer 30

Yes, when speed is reduced the flaps return to the selected position

Question 31

When does the autoslat system operate?

Answer 31

If slats are in the midrange position and stall speed is approached They automatically extend to the full position

Question 32

With the speed brakes deploy on landing if they are not armed?

Answer 32

Yes but not until either reverser is raised to its interlock stop

Question 33

If the auto-speed bakes are armed when do they

Answer 33

Landing gear on the ground and not tilted, thrust levers at idle

Question 34

Are the PFCs still used in direct mode?

Answer 34

No, controls are now operated directly by pilot inputs to the PCEs

Question 35

Is there a backup for the even if a complete electric shutdown?

Answer 35

Yes, there is a backup cable system from the flight deck to the stabilizer and selected spoilers

Question 36

What is the difference when floss are in secondary mode?

Answer 36

They are electrically powered and significantly slower

Question 37

What protection do you lose when using Alternete flap extension?

Answer 37

Flap Asymmetry protection

Question 38

When does the rudder become aerodynamics effective on takeoff?

Answer 38

Approximately 60 knots