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call of the heavies > Flight Controls CBT's > Flashcards

Flight Controls CBT's Flashcards

1
Q

How many elevators are there?

A

4

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2
Q

Pilot input to the elevator directly controls the ____ panels, and those directly control the ____ panels.

A

inboard ; outboard

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3
Q

Elevator feel is powered by____

A

Hydraulic system 2 and 3

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4
Q

Can elevator feel run on only 1 hydraulic system?

A

Yes

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5
Q

What happens to the hydraulic feel if both hydraulic system 2 and 3 goes down?

A

You lose airspeed gain scheduling and the feel is based only on springs

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6
Q

How is stab trim powered?

A

Hydraulic system 2 and 3

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7
Q

Why do the stab trim cutout switches say “stab trim 2 and 3”?

A

Because hydraulic system 2 and 3 power them.

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8
Q

What happens when you select a stab trim to the cutout position?

A

It depressurizes that stab trim hydraulic actuator

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9
Q

The stab trim cutout switch has 3 positions. cutout, auto, and on. What is each?

A

Cutout: cuts hydraulic power to the STCM
Auto: System logic will automatically cutout if it detects a runaway
On: Overrides AUTO logic and supplies hydraulic power to STCM

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10
Q

What is stab trim control column cutoff?

A

It automatically (temporarily) cuts the stab trim STCM if the control column is moving opposite of desired trim direction. (Trimming nose up but pushing nose down) etc.

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11
Q

How many different green takeoff trim bands are there? How are they calculated?

A
  1. Nose down band, mid band, nose up band.
    They are calculated based on the CG, takeoff thrust, and gross weight entered into the FMC
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12
Q

What does the aileron lockout mechanism do?

A

It locks the outboard ailerons at high speeds, to prevent over control. Above 238 knots is where they lockout

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13
Q

What happens if you trim the ailerons with the autopilot engaged?

A

The autopilot will fight that trim, and when you disengage the AP, it will violently snap the controls back to center. Aileron trim with autopilot engaged is forbidden.

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14
Q

On the status page, you can see position of flight control surfaces. In flight, you deploy speedbrakes. On the synoptic page, you see only the left spoilers are raised and the right are stowed. Is this cause for alarm?

A

No, it is normal. This is because the left display shows you the position of the 4th panel from the wingtip (used as speedbrake, ground spoiler, roll). The right side displays position of the most outboard (used as roll and ground spoiler, but no speedbrake).

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15
Q

If you got an EICAS advisor “AILERON LOCKOUT”, what does this mean?

A

If one or both outboard ailerons are not locked out at high speed, or they are locked out at low speed.

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16
Q

What are the takeoff flap settings?

A

10 or 20

17
Q

What are the landing flap settings?

A

25 or 30

18
Q

How many groups of leading edge flaps are there?

A

3 per wing. Outboard, midspan, inboard

19
Q

How are the leading edge flaps powered?

A

Pneumatically, with an electric drive backup (slower rate)

20
Q

How many groups of TE flaps are there?

A

2 per wing. Outboard and inboard.

21
Q

How are the TE flaps powered?

A

Normally by hydraulic system 4 for outboard, and hydraulic system 1 for inboard. But there is an electric drive for backup.

22
Q

How many flap modes are there? Which modes utilize the FCUs?

A
  1. Primary, secondary, and alternate. Primary and secondary use the FCUs, but alternate is direct flap control with no FCU.
23
Q

How many FCU’s are there?

A

3 flap control units

24
Q

To simplify all the different flap settings and configurations, what are the only 2 detents that move the leading edge flaps and what happens with each?

A

Flaps 1: LE flaps inboard and midspan extend (trailing edge do not move)

Flaps 2: LE flaps Outboard extend. (trailing edge flaps move to 5 position)

Any further movement: No effect on leading edge flaps

25
Q

How do the flaps normally operate in primary mode?

A

The FCUs drive the LE flaps pneumatically and TE flaps hydraulically.

26
Q

What kicks a flap group into secondary mode? How do secondary mode flaps operate?

A

If any flap group fails to move to the commanded position, FCUs switch to secondary mode for that flap group. Whatever flap group is in secondary mode is driven with electric motors.

27
Q

What does alternate flap control do?

A

This bypasses the FCUs and the flap lever is inoperative. You extend and retract with the knob. Electrically operated flaps. Maximum extension is flaps 25.

28
Q

What is flap load relief?

A

It automatically retracts the flaps if in 25 or 30 and the flap speed limits are exceeded. (goes to 25 or 20 as needed) (goes back to selected position when airspeed is reduced)

29
Q

Does flap load relief work in secondary mode?

A

No, only in primary

30
Q

How many spoiler panels per wing? Which ones are used as speedbrakes, flight spoilers (roll), and ground spoilers?

A

6 per wing.

Speedbrakes: All except 2 most outboard panels. (2 most inboard go to mid position)

Flight (roll) spoilers: All except the most inboard panel

Ground: All

31
Q

How are spoilers powered?

A

Hydraulically by system 2,3 and 4

Easy way to remember: STARTING FROM OUTBOARD TO INBOARD: 3-2-2-3 4-4

32
Q

When do you get a >SPEEDBRSKES EXT EICAS caution message?

A

If speedbrake lever is aft of ARM and any of the following occur:
-RA between 800’-15’
-Flaps in landing position
-2 or more thrust levers forward of closed

33
Q

How many rudder panels?

A
  1. Upper and lower
34
Q

How are the rudder panels powered?

A

Hydraulically. All 4 systems are on the rudder panels, so that if you lost 3 hydraulic systems, you would still have one rudder panel.

Upper panel: Hydraulic system 1 and 3
Lower panel: Hydraulic system 4 and 2

35
Q

What does the feel and trim unit for the rudders do?

A

It makes the controls more stiff at higher speeds

36
Q

What do the rudder ratio changers do?

A

They take input from the rudder pedals and provide input to the rudder hydraulic actuators

37
Q

How many rudder ratio changers?

A

2

38
Q

How many yaw dampers? how are they powered?

A

2, upper and lower. Hydraulic system 2 is lower, hyd 3 is upper.

call of the heavies (39 decks)

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