Flight Controls

Question 1

How many groups of leading edge flaps are provided and how are they normally powered?

Answer 1

-3 groups, inboard, midspan, and outboard
-Normally pneumatically powered from the bleed air duct

Question 2

What are the two groups of trailing edge flaps and how are they powered?

Answer 2

-Inboard and outboard
-Inboard Hydraulic System 1
-Outboard Hyrdaulic System 4

Question 3

Is there any asymmetry protection in alternate flap mode?

Answer 3

NO, there is no protection provided by the FCUs in alternate mode

Question 4

How are the trailing edge flaps driven in primary mode?

Answer 4

Hydraulically

Question 5

How long does the flap indication on primary EICAS remain displayed after all flaps are up?

Answer 5

10 seconds

Question 6

What protection features do FCUs provide for trailing edge flaps in primary mode?

Answer 6

1-Asymmetry protection
2-Flap load relief
3-Flap position information to EICAS and other systems

Question 7

How many FCUs are provided?

Answer 7

Three

Question 8

What is the maximum extension of the trailing edge flaps in alternate mode?

Answer 8

Flaps 25

Question 9

What EICAS advisory message displays if all three FCUs fail in their control function?

Answer 9

FLAPS CONTROL

Question 10

How does the flap alternate control work?

Answer 10

1-Bypasses FCUs
2-Manually Selected
3-All flaps extended or retracted by electric motors

Question 11

Is there any asymmetry protection in alternate flap mode?

Answer 11

NO - FCU only provide asymmetry protection in normal mode

Question 12

What happens if a primary control failure occurs either in the iboard or midspan leading edge group?

Answer 12

Both groups switch to secondary mode

Question 13

When do the spoiler panels extend to the up position during landing if the speedbrake lever is NOT armed?

Answer 13

1-Thrust levers 1 and 3 near idle
2-Main landing gear on ground
3-Reverse thrust levers 2 or 4 pulled up to idle detent

Question 14

-8 To improve takeoff performance and reduce noise, outboard ailerons are deflected down at which flap settings?

-They return to neutral position at which flap settings?

-Inboard ailerons droop in which flap settings?

Answer 14

1-10 or 20
2-25 or 30
3-10 or greater (Removed if AOA above stick shaker)

Question 15

Describe function of the stabilizer (STAB) trim cutout switches AUTO position

Answer 15

-Supplies hydraulic power for stab trim
-Shuts off system hydraulic power if unscheduled trim detected

Question 16

What is the affect on the flap system during engine reverse thrust operation?

Answer 16

Inboard and midspan LE flaps retract automatically

Question 17

What surface is moved when stab trim inputs are made?

Answer 17

-Leading edge of horizontal stabilizer
-Stabilizer trim varies the angle of incidence of the horizontal stabilizer

Question 18

What is the purpose of the yaw dampers?

Answer 18

Improve lateral and directional stability and to provide turn coordination

Question 19

How does the aileron lockout system work and what is it’s purpose?

Answer 19

-Locks ouboard ailerons in neutral position at high air speeds

-Permits full travel of outboard aileron at low airspeeds

-Prevents overcontrolling at high airspeeds

Question 20

What system assits the -8 in patch stability and landing flare?

Answer 20

-Pitch Augmentation Control System (PACS)

-During landing flare, provides small amout of nose up elevator as airplane approaches runway without moving control column

Question 21

When does the -8 takeoff and landing tail strike protection activate?

Answer 21

PACS sensce imminent tail strike decreasing elevator deflection (does not move control column)

Question 22

Takeoff trim setting is based on?

Answer 22

1-Gross weight
2-CG
3-Takeoff Thrust De-rate
4-Takeoff flap selectiom (-8 only)

Question 23

Will pushing the control wheel stab trim switches, with multiple autopilots engage, cause the AP to disconnect?

Answer 23

No, trim switches inhibited with multiple AP engaged