Flight Controls Flashcards

1
Q

The primary flight control system is highly redundant with three operating modes. Name them:

A

Normal, Secondary, and Direct

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2
Q

When armed what activates the thrust asymmetry compensation system?

A

when engine thrust differs by more than 10% between engines

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3
Q

With the autopilot engaged, using the primary pitch trim switches will ____.

A

will have no effect, as they are inhibited

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4
Q

The amount of aileron trim is indicated:

A

on a scale on top of each control column

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5
Q

In the event of a complete electical system shut-down, cables from the flight deck to the stabilizer and Spoilers ____ allow the pi

A

4 and 11

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6
Q

Some 777-300ERs are equipped with a tail skid system. How is this system activated?

A

Automatically and uses the main landing gear actuation system.

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7
Q

On the 777-300ER aircraft to protect against inadvertent deployment during cruise, flap and slat extension from the UP position is inhibited when

A

speed is more than 275 knots or altitude is above approximately 20,000 feet.

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8
Q

Before liftoff, the thrust asymmetry compensation (TAC) system ________________ for the failed engine.

A

does not fully compensate

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9
Q

In-flight, at what flap settings are Speedbrake operations allowed.

A

There is no limitation for extension of speedbrakes in a landing configuration.

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10
Q

What are the functions of the PRIMARY FLIGHT COMPUTERS Disconnect Switch in the AUTO position?

A

The Flight Control System operates in the Normal Mode and system faults automatically cause the system to switch to the Secondary or Direct modes.

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11
Q

In the Secondary Flap/Slat mode on the 777-300ER, because Autoslats are unavailable, the slats are fully extended at all flap positions if airspeed is less than 256 knots.

A

True

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12
Q

While hand flying the airplane (Normal PFC mode), if we move these switches on the yoke, how does this affect the pitch trim of the airplane and what flight controls move?

Yolk trim switches

A

The switches change the PFC pitch trim reference speed, prompting the PFCs to reposition the elevators and then streamline the stab. .

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13
Q

In this mode, trim reference speed is changed by yoke pitch trim switch input, which sends a signal to the PFCs to move the elevator and stabilizer to generate the commanded pitch trim. The PFCs also provide ____.

Normal mode

A

compensation for flap, speedbrake, thrust, and configuration change as well as turns up to 30 degrees of bank

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14
Q

In this flight control mode, the stabilizer motion may automatically move to streamline for thrust and configuration changes. What happens when the airplane is no longer in the normal mode and is in either the secondary or direct mode?

Normal mode

A

The aircraft no longer has automatic pitch compensation. Changes to thrust or configuration do not cause automatic elevator/stabilizer movement.

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15
Q

Loss of air data will result in the PFCs reverting to the ____ mode.

A

Secondary

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16
Q

When the PFCs revert to the Secondary mode, ____ will operate in a degraded mode:

A

Rudder Ratio and Elevator Feel

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17
Q

The degraded mode of rudder ratio and elevator feel provide two settings that are based upon ____.

A

flap position

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18
Q

During flight, the EICAS advisory HYD QTY LOW C was followed by the caution HYD PRESS SYS C. Checklists were accomplished. Later, while configuring for approach and landing, you get these EICAS cautions as shown. What should you do? (Both 777-200ER and 777-300ER)

Slats Primary Fail
Flaps Primary Fail

A

Plan for a Flaps 20 Landing and expect slow slat and flap operation.

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19
Q

With the slats and flaps in the secondary mode prior to extension, your landing configuration will be ____.

A

Flaps 20, slats full

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20
Q

Before configuring, you get the EICAS caution FLAP/SLAT CONTROL. Which of the following statements is true?

A

There are no protections provided by the FSEUs

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21
Q

TAC is available when ____.

A

airspeed is above 70 knots

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22
Q

The stabilizer is powered by ____.

A

right and center hydraulic systems

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23
Q

The takeoff stabilizer trim green band is calculated using:

A

FMC inputs of CG, gross weight, takeoff thrust and V1

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24
Q

With the PFC’s in the NORMAL mode, autopilot off, flight control inputs from the pilot go directly to ____.

A

ACEs and then the PFCs, then back to the ACEs

25
Q

Which hydraulic systems power the spoilers?

A

All three

26
Q

Flap load relief is available at ____.

A

flaps 15 through 30 positions only

27
Q

In which flap and slat mode is Autoslat operation available?

A

Primary

28
Q

When armed what activates the thrust asymmetry compensation system?

A

when engine thrust differs by more than 10% between engines

29
Q

Bank angle protection is not available in either the secondary or direct mode

A

True

30
Q

In the ____ flight control system mode(s), the Manual Trim Cancel Switch is active for canceling manual rudder trim.

A

normal and secondary

31
Q

Moving the Primary Flight Computers Disconnect Switch to the DISC position puts the flight controls in the _____ mode.

A

Direct

32
Q

While airborne in the flight control system normal mode, the control wheel pitch trim switches____.

A

cause the primary flight computer to change the pitch trim reference speed

33
Q

With the autopilot engaged, using the primary pitch trim switches will ____.

A

will have no effect, as they are inhibited

34
Q

The EICAS caution message SPEEDBRAKE EXTENDED is displayed if speedbrakes are extended when ____.

A

flap lever in landing position

radio altitude is between 15 and 800 feet

either thrust lever is not closed

all of the above

35
Q

Alternate pitch trim levers ____.

A

are linked via control cables to the stabilizer trim control modules (STCM)

36
Q

During takeoff, the rudder becomes aerodynamically effective at approximately ____.

A

60 knots

37
Q

The thrust asymmetry compensation (TAC) system disengages ____.

A

if engine thrust data is lost

38
Q

In the secondary and direct flight control modes, the elevator feel system changes when ____.

A

the flaps are extended out of up

39
Q

The Alternate Pitch Trim Levers should not be used ____.

A

with the autopilot engaged

40
Q

On the 777-200ER, flap and slat extension is inhibited whenever altitude is above approximately 20,000 feet or airspeed is above ____ knots.

A

265

41
Q

On the 777-300ER aircraft to protect against inadvertent deployment during cruise, flap and slat extension from the UP position is inhibited when

A

speed is more than 275 knots or altitude is above approximately 20,000 feet

42
Q

What are the flap limit speeds on the 777-300ER for flaps 25 and 30?

A

Flaps 25-200 knots and Flaps 30-180 knots

43
Q

On the -300ER, what is/are the authorized flap setting(s) for takeoff with TO thrust selected?

A

Both 15 and 20

44
Q

On the 777-300ER, flap and slat extension is inhibited whenever altitude is above approximately 20,000 feet or airspeed is above ____ knots.

A

275

45
Q

Before liftoff, the thrust asymmetry compensation (TAC) system ________________ for the failed engine.

A

does not fully compensate

46
Q

The thrust asymmetry compensation (TAC) system significantly reduces uncommanded flight path changes associated with an engine failure or thrust differential by automatically adding rudder to minimize yaw.

A

True

47
Q

In the Secondary Flap/Slat Mode, what will happen if the aircraft exceeds 256 knots (777-300ER) with the slats fully extended?

A

The slats automatically retract to the mid-range position and LOAD RELIEF is displayed.

48
Q

How are the Flaps/Slats actuated when the Alternate Flaps Arm (ALTN FLAPS ARM) switch is in the Alternate (ALTN) position?

A

Electrically using the Alternate Flap Selector.

49
Q

Select the true statement(s) regarding the Stabilizer Position Indicator green band.

A

The green band displays the allowable takeoff trim range.

When V1 is not selected or entered the green band defaults to mid-range.

When no information is available the green band defaults to mid-range.

All of the above.

50
Q

In the Normal PFC mode, as airspeed changes, the PFCs provide conventional pitch control characteristics by requiring the pilot to make control column inputs or trim changes to maintain a constant flight path.

A

True

51
Q

In the Normal PFC mode, as airspeed changes, the PFCs provide conventional pitch control characteristics by requiring the pilot to make control column inputs or trim changes to maintain a constant flight path.

A

True

52
Q

What are the functions of the PRIMARY FLIGHT COMPUTERS Disconnect Switch in the AUTO position?

A

The Flight Control System operates in the Normal Mode and system faults automatically cause the system to switch to the Secondary or Direct modes.

53
Q

Select the true statement regarding operation of the primary pitch trim switches in-flight (Normal Mode).

A

When pilot trim inputs are made, the PFCs automatically position the elevator to achieve the trim change and then move the stabilizer to streamline the elevator.

54
Q

If the bank angle exceeds 35 degrees, Bank Angle Protection changes the color of the PFD bank indicator to amber and;

A

The control wheel force rolls the airplane back to within 30 degrees of bank.

55
Q

When is the Wheel to Rudder Cross-Tie function operative?

A

In the Normal Flight Control mode in-flight below 210 knots.

56
Q

Select the true statement(s) regarding Flight Envelope Overspeed Protection operations.

A

At VMO/MMO, Overspeed Protection limits the Trim Reference Speed so that trim is inhibited in the nose down direction.

Use of the alternate pitch trim levers does not reduce the column forces.

All of the above.

57
Q

This message is displayed if speedbrakes are extended when ____.

Speedbrake Extended

A

flaps lever is in landing position

radio altitude is between 15 and 800 feet

either thrust lever is not closed

all of the above

58
Q

With the displayed message, what is the correct action?

Slats Drive

A

Automatic landings are not authorized.

59
Q

You are on approach with the flaps in the Flaps 1 position. As you move the flap handle to the Flaps 5 position, this EICAS Caution immediately appears, and the flaps stop moving. In the B777 Landing Distance App, which Failure will you select to get the proper Non-Normal landing distance?

Flaps Drive

A

Flight Controls: FLAPS DRIVE (less than or equal to Flaps 5)