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787 Systems > Flight Contorls > Flashcards

Flight Contorls Flashcards

1
Q

What 2 systems make up the Flight controls

A

Primary flight controls

Flaps and slats

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2
Q

Normal levels of primary flight controls and flap/slats control

A

Primary –> Normal - Secondary - Direct

Flaps/Slats —> Primary - Secondary - Alternate

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3
Q

What does the 787 have to fix control jams

A

Jam override Mechanism

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4
Q

How does the Fly-by-wire work

A

Norm -
Pilot - ACES’s - PFC’s - ACE’s - Actuators

Secondary
Pilot - ACES - Actuators

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5
Q

Where can you see the Flight control operating mode

A

Flight control Synoptic

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6
Q

Describe the flaps and Slats

A

Fly-by-wire
Slats - 6 and 1 Krueger flaps

trailing edge flaps - single slotted flaps inbd and outbd

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7
Q

What are the positions of the Slats and Krueger flap

A

Slats - Cruise/Take off/Ldg

Krueger flap - Retract or Deployed

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8
Q

Describe the Flap settings

A

7 positions

FL UP
FL 1  (Slats only to mid)  Gate 1
FL 5
FL 15
FL 20  Gate 2
FL 25 (Slats only to full)
FL 30

Slats extend at Flap 1 position (middle) and Flap 25 (full)

T/O - 5, 15, 20
LDG - 25, 30

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9
Q

What flight controls are available incase of loss of all three HYD

A

Stabilizers
2 Spoilers

(both Electric)

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10
Q

How many ACE’s

A

4

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11
Q

How many spoilers

A

7 per wing

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12
Q

When is rudder effective

A

> 60 kts

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13
Q

What are the 4 flight control power sources

remember one it the back up

A

Left HYD
Center HYD
Right HYD

Electirc

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14
Q

What provides Electrical power for control services

A

PMG’s - 3 perminant magnetic generators
- 2 on left one on right

if no gen rotation - 28 VDC system on main Batt

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15
Q

What are the flight control surface locks

and what if they are left on

A

Maint to provent surface movement (tail and Wings)

if left on auto unlock at >40 kts on T/O

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16
Q

What are Back drive actuators

A

position the controls so as to simulate the movement of controls

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17
Q

Which FC mode can be selected by a switch

A

Direct

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18
Q

When is back pressure required when banking

A

30 deg

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19
Q

How is pitch provided

A

Elevators and Horizontal stabilizer

auto - gear, flap, speed brakes, config changes < 30 deg bank

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20
Q

What controls the Elevators

A

2 actuators each driven by different HYD systems

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21
Q

What are the Pitch enevlope protections

A

Stall - PFC limit trim to Vma
Overspeed - Trim
tailstrike - Auto elevator defliction

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22
Q

Can you trim with A/P

A

no

23
Q

What is the Trim Reference Speed

A

Speed A/C would stabilize if there were no control column inputs

24
Q

How do the PFC’s reconfigure the A/C

A

Auto adjust the stabilizer to reduce forces and streamline the A/C

25
Q

Where is Stabilizer Position displayed

A

EICAS and Flight Control Synoptic

26
Q

Where is the T/O range indicated

A

Green band on EICAS

27
Q

What is Stab Cut out and where is it

A

Cut out L2 and R2 switches

just blow the speed brake

28
Q

What are the Stab operating modes

A

Norm - L1 & R1
Secondary - L1 OR R1
Direct - none

29
Q

How can we control pitch if Stab is stuck

A

Elevators

30
Q

In normal mode does the trim switch move the stab or elevators

A

elevators and Trim Ref Speed modifies

31
Q

Does movement of Primary or ALT pitch switches when A/P engaged cause A/P to disengage

A

No

the switches are inhibited

32
Q

How is roll provided

A

Ailerons and Flaperons and augmented by spoilers

33
Q

is there aileron tirm

A

no

34
Q

describe the aileron and flaperon

A

Each aileron and Flaperon has 2 actuators

Powered by 3 HYD systems

35
Q

Where can you set the bank limit

A

Below the HDG

36
Q

What is the AUTO Bank Limit

A

35 deg

force brings back to 30 deg

37
Q

How are the 14 spoilers powered

A 
10 HYD
4 Electric (4+5 &amp; 10+11)

1 actuator per spoiler

38
Q

When do Speed Brake Lever go to up

A

Landing gear on the ground and

thrust levers not in T/O range

39
Q

When do Speed brakes Deploy

A

Landing - Thrust reverse to idle

T/O - >85 power to T/O then to idle

40
Q

What is the auto drag function

A

Assist to slow if high on approach

  • Extending ailerons and spoilers (2 outbd)
  • only at landing config 25 or 30 thrust idle
41
Q

What is Rudder Ratio changer

A

Changes the rudder feel as A/S increases

42
Q

What is Gust suppression

A

auto application of flight controls in gusts of turb

A/P and VNAV or ALT

43
Q

Where is the Rudder position displayed

A

EICAS

44
Q

What happens to the Rudder Trim on T/O

A

Man trim auto zerod during T/O roll

> 30 kts until airborne

45
Q

What do the flaps and Slats do

A

Lift devices
increase wing lift
decrease stall speed

46
Q

what positions of flap selection dont move the flaps

A

FL 1

FL 25

47
Q

What are the 3 slat positions

A

Up, Middle, Full

48
Q

What does flap indicator Green and Magenta mean

A

Green - at selected

Magenta - in transit

49
Q

When are flaps/slats inhibited

A

> 260 kts

>20,000 ft

50
Q

What is Auto Gap

A

Changes the slat from middle to full < 225 kts

51
Q

What is Flap Load Relief

A

Protects flap from excessive air loads
auto retracts to safer position

(displayed on EICAS)

52
Q

How can you tell you are in Secondary mode of Flaps and Slats

Direct?

A

EICAS display

Secondary - Flaps appear broken up into segments
- limited to FL 20

Direct - Segmented but also shows index marks
- REMEMBER NO PROTECTIONS FOR DIR

53
Q

What is cruise flaps Auto

A

minor movement of flap/ailerons/flaperons/spoilers

> 25,000ft
A/S 0.54 -0.87 Mach

(normal mode)

787 Systems (19 decks)

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