Flight Controls

Question 1

If the aileron control system is jammed on the captains side, force applied to the FO’s side provides roll control through

Answer 1

the spoilers

Question 2

if the aileron control system is jammed on the FO’s side, force applied to the CA’s side provides roll control through

Answer 2

the ailerons

Question 3

What happens when you press both aileron trim switches?

Answer 3

Trim electrically repositions the aileron feel and centering unit and the control wheel will rotate and define a new neutral position

Question 4

How many flight spoilers are there?

Answer 4

four on each wing

Question 5

When the control wheel is displaced more than approx. ___degrees, spoiler deflection is initiated

Answer 5

10

Question 6

FLIGHT SPOILER Switches

Answer 6

ON (guarded position)- normal operating position

OFF- closes the respective flight spoiler SOV

MX ONLY

Question 7

In the event of a control column jam, how will the elevator ccontrol be affected?

Answer 7

The override mechanism will allow the control columns to be separated and the free control column will provide adequate control.

Total available elevator travel will be significantly reduced but enough will be available to flare

Question 8

Can you use stabilizer trim if there is a control column jam?

Answer 8

Yes

Question 9

What does the elevator feel system do?

Answer 9

provides simulated aerodynamic forces using airspeed from the elevator pitot system and stabilizer position.

Question 10

Which hydraulic system pressure does the elevator feel computer use?

Answer 10

Whichever is higher

Question 11

FEEL DIFF PRESS light

Answer 11

indicates excessive differential pressure in the elevator feel computer

Question 12

What does the Mach trim system do and how?

Answer 12

Provides speed stability at higher mach numbers.

It uses mach info from the ADIRU to compute a mach trim actuator position and repositions the elevator feel and centering unit which adjusts the control column neutral position

Question 13

Above what speed is mach trim automatically accomplished?

Answer 13

.615M

Question 14

The main electric and AP stabilizer trim have how many modes?

Answer 14

High speed with flaps extended

Low speed with flaps up

Question 15

the STAB TRIM MAIN ELECT and STAB TRIM AUTOPILOT cutout switches

Answer 15

allow the AP or main electric trim inputs to be disconnected from the trim motor

Question 16

What happens when the STAB TRIM override switch is positioned to OVERRIDE

Answer 16

the electric trim can be used regardless of control column position

Question 17

Will manual rotation of the trim wheel override the AP or main electric trim?

Answer 17

Yes

Question 18

What is the speed trim system (STS)

Answer 18

improves flight characteristics during operations with low gross weight, aft CG, and high thrust when AP is not engaged.
returns a/c to a trimmed speed by commanded stablizer in a direction opposite the speed change

Question 19

Conditions for STS to operate

Answer 19

fully enabled between 100 KIAS and .60M with fadeout to zero by .68M

10 seconds after takeoff

5 seconds following release of trim switches

AP disengaged

Sensing of trim requirement

Question 20

What three systems help the pilot identify and prevent further movement into a stall condition?

Answer 20

Elevator feel shift, speed trim system, an yaw damper

Question 21

How do the EFS, STS, and yaw damper help the pilot with stall identification?

Answer 21

the EFS increases hydraulic system A pressure to the elevator feel and centering unit to double control column forces

the STS trims nose down as airspeed decreases and also enables speed trim above stickshaker AOA

the Stall Management/Yaw Damper Computer (SMYD) reduces yaw damper commanded rudder movement

Question 22

At speeds above approx. ___ knots, both hydraulic system A and B pressure are reduced within the main PCU by approx. __% each

Answer 22

135 kts, 25% to limit full rudder authority

Question 23

What is the Force Fight Monitor and what actions does it take when tripped?

Answer 23

it detects opposing pressure between the A and B rudder actuators (this may occur if either system is jammed/disconnected).

-Turns STandby Hydraulic Pump ON

-Opens the standby rudder SOV to pressurize standby rudder PCU
.
-Illuminates STBY RUD ON, master caution, and FLT CONT lights

Question 24

How many yaw dampers are there?

Answer 24

The main yaw damper and the standby yaw damper

Question 25

What is the purpose of the yaw damper

Answer 25

dutch roll prevention, gust damping, and turn coordination

Question 26

Which hydraulic system does the main yaw damper use?

Answer 26

B

Question 27

When does the yaw damper switch automatically move to OFF and the amber YAW DAMPER light illuminate?

Answer 27

SMYD senses a Y/D system fault SMYD senses that Y/D does not respond to a command B FLT CONTROL switch is positioned to OFF or STBY RUD

Question 28

When is the only time that the YAW DAMPER switch can be reset to on in flight?

Answer 28

During manual reversion when both FLT control switches are positioned to STBY RUD

Question 29

When will the auto speed brake system operate?

Answer 29

SPEED BRAKE lever in ARMED position SPEED BRAKE ARMED light illuminated RA less than 10 feet Landing gear strut compression Both thrust levers IDLE Main gear wheels spin up (> 60 knots)

Question 30

Compression of which main landing gear strut enables the ground spoilers to deploy?

Answer 30

The right. Compression of either main gear will enable the flight spoilers, however.

Question 31

if the SPEED BRAKE lever is in the DOWN position during landing or RTO, when will the auto speed brake system operate?

Answer 31

Main gear wheels spin up (>60 knots) both thrust levers at IDLE reverse thrust levers positioned for reverse thrust

Question 32

LE devices consist of what?

Answer 32

two LE inboard flaps and four LE slats outboard of each engine

Question 33

Which hydraulic system normally operates the LE and TE flaps?

Answer 33

B

Question 34

What happens to the LE devices when the flap handle is selected to 1, 2 or 5

Answer 34

the LE flaps extend to full extended the LE slats extend to the extend position

Question 35

What happens to the LE devices when the flap lever is selected to beyond 5?

Answer 35

the LE flaps stay fully extened the LE slats extend to the fully extended position

Question 36

from which side does the Flap Slat ELectronic Unit receive data?

Answer 36

the left ADIRU (so if they CA's airspeed is too high for the selected flap setting, the flap load relief activates and retracts TE flaps to next lower position

Question 37

If the CA's airspeed is reading erroneously high and the flap load relief function is activating, how can you achieve your desired flap setting?

Answer 37

by selecting the next higher flap detent

Question 38

Flap load relief is only available at flaps selected to:

Answer 38

30 or 40

Question 39

Flap load relief at Flaps 40:

Answer 39

retract to 30 if airspeed exceeds 163kts re extend when airspeed is below 158 kts

Question 40

Flap load relief at Flaps 30:

Answer 40

retract to 25 if airspeed is above 176 knots re extend when airspeed is reduced below 171

Question 41

What is the purpose of Autoslats and which hydraulic system normally operates them?

Answer 41

Enhances stall characteristics at high AOAs during takeoff or approach to landing. The slats will begin driving to full extend position as the airplane approaches stall. Hydraulic system B

Question 42

what is the alternate source of power for the autoslat system?

Answer 42

it is provided by system A through a Power Transfer Unit. the PTU uses system A pressure to power a hyraulic pump, pressurizing the B system fluid

Question 43

Alternate Flaps Master switch

Answer 43

OFF- normal position ARM- - CLoses TE flap bypass valve - activates standby pump - arms alternate flaps position switch

Question 44

Alternate flaps position switch

Answer 44

UP- electrically retracts TE flaps but LE devices remain extended OFF - nomal Down- momentarily will extend LE devices using standby hydraulic pressure and if you hold it, it will extend the TE flaps until released

Question 45

SPEED TRIM FAIL (amber)

Answer 45

indicates failure of STS OR indicates failure of single FCC channel when master caution recall is activated

Question 46

MACH TRIM FAIL (amber)

Answer 46

indicates failure of mach trim system OR indicates failure of single FCC channel when master caution recall is activated

Question 47

AUTO SLAT FAIL (amber)

Answer 47

indicates failure of autoslat system OR indicates failure of single SMYD computer during master caution recall

Question 48

What is flap asymmetry?

Answer 48

If a device on one wing does not align with the symmetrical device on the other wing

Question 49

What is flap skew?

Answer 49

when symmetrical TE flaps do not operate at the same rate causing panels to twist during extension or retraction

Question 50

What does FSEU do when it detects TE flap asymmetry or skew?

Answer 50

Closes TE flap bypass valve displays needle split on flap position indicator SHows position of left and right wing TE flaps

Question 51

Uncommanded motion of LE devices is detected when: What does the FSEU do if that happens?

Answer 51

no TE flap position or autoslat command is present and two LE flaps move on one wing or two or more slats move on one wing. The FSEU shuts down the LE control an illuminates LE FLAPS transit light

Question 52

When is TE uncommaned motion detected: What does the FSEU do in this case?

Answer 52

when no flap lever or flap load relief command is present and the TE flaps: move away from commanded position continue to move after reaching commanded position move in direction opposite to that commanded The FSEU will close the TE flap bypass valve, which canot be reset

Question 53

Flight Control LOW PRESSURE lights

Answer 53

indicates low hydraulic system pressure to ailerons, elevator, rudder is deactivated when associated flight control switch is positioned to STBY RUD and standby rudder SOV opens

Question 54

Standby Hydraulic Low Quantity light (amber)

Answer 54

indicates low quantity in standby hydraulic reservoir | Always armed

Question 55

Standby Hydraulic Low Pressure light (amber)

Answer 55

indicates output pressure of standby pump is low armed only standby pump operation has been selected or automatic standby function is activated

Question 56

STBY RUD ON (amber)

Answer 56

indicates standby rudder system is commanded on to pressurize the standby rudder PCU