B787 Flight Controls

Front 1

PRIMARY FLIGHT COMPUTERS (PFCs)

DISC

AUTO

DISC LT

Back 1

DISC-disconnects the PFCs from the flt ctrl sys

-pus the flt ctrl sys in the direct mode

-AUTO can be reselected to attempt restoration of the secondary or normal mode operation.

AUTO-the flt ctrl sys operates in the norm mode

-sys faults automatically cause the sys to sw to the secondary or direct modes

DISC(Illum amber)-the PFCs are disconnected either automatically or manually and the sys is in the direct mode

Front 2

ATLN PITCH TRIM

Switches

Back 2

Spring loaded neutral

Push (both switches)

-on the gnd, directly moves the stabilizer

-in the air in norm mode, changes the trim reference airspeed

-in the air in the secondary mode and direct modes, directly moves the stabilizer

Front 3

NORM

CUTOUT

Back 3

NORM-electrical pwr is supplied to the related stabilizer control unit

-L2-the related left 235 Vac bus

-R2-the related right 235 Vac bus

-if unsheduled stab motion is detected, electrical pwr to the related stab control unit is automatically shut off

CUTOUT-shuts off electrical pwr to the related stab control unit

Front 4

On the GND

Reacting to THR LVR

and REV

Back 4

GND-the speedbrake lever moves to DOWN, all spoiler panels retract if either THR LVR is advanced to the T/O THR POS

-SPD BRK LVR moves to UP and all spoiler panels EXTD if both REV THR LVRS are raised to the reverse idle detent

Front 5

DOWN

ARMED

UP

Back 5

DOWN-(detent)-all spoiler panels are retracted.

ARMED-auto SPD BRK SYS is armed

UP-the required spoiler panels EXTD to their maximum in-flight or on-ground position (intermediate positions can be selected)

Front 6

ALTN FLAPS ARM

Back 6

Push (ALTN displayed)

-arms the alt flap ctrl mode

-arms the alt flap selector

-disables primary and secondary flap/slat mode operation

-asymmetry/skew and uncommanded motion protection, slat autogap, and flap/slat load relief are not available.

-flap lever is inoperative

Front 7

RET

OFF

EXT

Back 7

RET-retraction is accompished electrically and sequenced so that full flap retraction occurs before the slats begin to retract.

OFF-alt flaps are deactivated

EXT-slats and flaps are electrically extended

-maximum extension is flaps 20, with slats at the midrange position.

Front 8

NORM

LOCK

FAIL

Back 8

NORM-respective flt ctrl surfaces are unlocked

LOCK-(illum amber)-respective flt ctrl surfaces are electrically locked

-EICAS advisory message FLT CONTROL LOCKED is displayed

FAIL-(illum amber)-a flt ctrl surfaces lock switch is selected and any of the respective flt ctrl surfaces are not locked

Front 9

FLAP Sequence

Back 9

1-slats to mid position

5, 15, 20-flaps move

25-slats to full extend position

30-flaps move

Front 10

FLAP modes

Back 10

Primary

Secondary

Alternate

Front 11

Protections in primary

Back 11

Asymmetry

Flap Slat Disagree

Flap/Slat load Relief

Slat Autogap Slat pregap

Front 12

Auto switch to secondary mode

Back 12

-center hyd sys failed, or

-control surfaces travel at less than 50% of the normal hyd rate, or

-flap or slat primary control failure, or

-primary mode fails to move flaps or slats to the selected position, or

-uncommanded flap or slat motion is detected.

Front 13

Flap limit in secondary or alt mode

Back 13

flaps 20

Front 14

flap load relief settings

Back 14

15, 20, 25 or 30

only relief up to flap 5

only in primary mode

Front 15

slat load relief

Back 15

available in primary or secondary mode

if fully extended slats above 225, will retract to mid, go back to full extend when below 225 KIAS

Front 16

slat autogap

Back 16

only in primary mode

slats in mid position and below 225 KIAS

with high AOA autogap extends slats fully

will retract to mid with reduced AOA

secondary mode is too slow for autogap

Front 17

slat pregap

Back 17

in secondary mode, autogap too slow to respond

slats will full extend with flap selector out of UP and below 225 KIAS

slats remain in extended position until flap lever is up OR above 225 KIAS

Front 18

Crusie flap

Back 18

automatically moves flaps, ailerons, spoilers and flaperons to optimize camber.

only in cruise above FL 250 between .54-.87 M

Front 19

Flap and Slat asymmetry detection

Back 19

in primary and secondary modes

Front 20

uncommanded flap or slap motion detects

Back 20

flap or slat;

-move away from commanded position, or

-continue to move after reaching a commanded position, or

-move in a direction opposite to that commanded

if primary, (PRIMARY FAIL0 auto to secondary, if continues, shuts down system (FLAPS DRIVE, SLATS DRIVE).

Front 21

FLAPS SLATS DISAGREE

Back 21

In primary and moving at half the normal rate, auto transfers to secondary (PRIMARY FAIL),

if the rate continues at less than have the normal rate, system shuts down (FLAPS DRIVE, SLATS DRIVE).

Front 22

When is the autodrag function available?

Back 22

"only in the landing configuration, flaps 25 or 30 and thrust levers at idle"

Front 23

How is the horizontal stabilizer powered in the 787?

Back 23

by an electric control unit powered by L2 and R2 AC busses

Front 24

What is the purpose of the cruise flaps function in the 787?

Back 24

optimizes cruise performance by varying the wing camber reducing drag

Front 25

Which hydraulic systems supply 5 pairs of spoilers?

Back 25

all three hydraulic systems

Front 26

When is the digital readout on the Stabilizer Position Indicator displayed in green?

Back 26

when the FMC performance data is entered and the trim pointer is within the green band

Front 27

"What condition will cause the stabilizer position indicator digital readout to be replaced with an ""X"" and the pointer to be amber?"

Back 27

Stabilizer trim is inoperative.

Front 28

Do the rudder pedals move with rudder trim operation?

Back 28

yes

Front 29

How do the flaperons move to provide more lift to improve slow speed performance?

Back 29

The flaperons droop with the trailing edge flaps.

Front 30

How are the alternate pitch trim switches linked in the 787?

Back 30

electrically to the horizontal stabilizer trim actuator and mechanically to the stabilizer

Front 31

What does the EICAS message FLIGHT CONTROL MODE indicate?

Back 31

The flight control system is in the secondary mode.

Front 32

What is the purpose of the flap gate at the Flaps 1 position?

Back 32

prevents inadvertent retraction of the slats html>

Front 33

What is the purpose of the flap gate at the Flaps 20 position?

Back 33

prevents the inadvertent retraction of the flaps past the go-around position

Front 34

What are the three operating modes of the primary flight control system?

Back 34

"Normal, Secondary and Direct"

Front 35

How is pitch and roll control accomplished if all hydraulic power is lost?

Back 35

electrically activated stabilizer and two spoiler pairs using pitch trim switches and the control

Front 36

What function is provided by the spoilers?

Back 36

roll control and speedbrakes

Front 37

What control surfaces provide roll control in low speed flight?

Back 37

"Ailerons, Flaperons and Spoilers"

Front 38

At what approximate speed does the single rudder become aerodynamically effective to provide yaw control?

Back 38

60 knots groundspeed

Front 39

"When the two FLIGHT CONTROL SURFACES lock switches are in the locked position, at what speed do the flight control surfaces automatically unlock?"

Back 39

when groundspeed exceeds 40 knots

Front 40

The autopilot is available in what Primary Flight Control System Modes?

Back 40

Normal mode only

Front 41

"When the flight control system is operating in the secondary mode, what functions are NOT available?"

Back 41

"Envelope protection, Autopilot, Tail strike protection"

Front 42

How can the Primary Flight Control System be changed to the direct mode?

Back 42

automatically or manually

Front 43

What is available for pitch trim in the normal mode when the stabilizer is manually shutdown or has failed?

Back 43

Pitch trim is available through the elevators.

Front 44

In what Primary Flight Control Modes is column cutout available?

Back 44

Normal and Secondary

Front 45

What is the bank angle protection boundary?

Back 45

approximately 35 degrees

Front 46

What conditions must be present for the slat autogap function to be available?

Back 46

slats in the middle position and airspeed below 225 KIAS

Front 47

EICAS STAB GREENBAND (3)

Back 47

-Computed green band disagrees with pressure transducer data, or

-the two transducer values are not within the set tolerance, or

-either transducer has failed

Front 48

What functions are not available in Secondary or Direct Mode? (7)

Back 48

*Autopilot

*Auto speedbrake

*envelope protection

*Gust suppression

*Pitch compensation

*roll/yaw asymmetry compensation

*tail strike protection

Front 49

Flight envelope protection provides? (3)

Back 49

* bank angle protection

* overspeed protection

* stall protection

Front 50

Speedbrake lever moves to UP (armed)

Back 50

main gear trucks untilt and both thrust levers are not in the takeoff range.

Front 51

Speedbrake lever moves to UP (not armed)

Back 51

*on GND and GND SPD >85 knots, either thrust lever was previously in the takeoff range, then both thrust levers are moved to the idle range (rejected takeoff), OR

*on GND and both thrust reverse levers are moved to the reverse idle detent.

Front 52

Speedbrake automatically driven to DOWN

Back 52

*on GND, when either THR LVR is moved to T/O range, OR

*on GND, if there is a transition to in the air, OR

*in FLT, when either THR LVR is beyond 90% full travel.

Front 53

Auto Speedbrakes are available in what mode?

Back 53

Normal mode only.

Front 54

When does Autodrag operate?

Mode?

When is it removed?

What controls do what?

Back 54

*flaps 25,30 THR LVRs at IDLE

*Normal mode

*Below 500' AGL

*ailerons and 2 most outward spoilers move are raised when aircraft is on or above G/S or G/P