Flight Controls

Question 1

Which hydraulic system(s) can power all primary flight controls?

Answer 1

A & B

Question 2

What are the secondary flight controls?

Answer 2

Trailing Edge Flaps, Leading Edge Devices (Flaps/Slats), Spoilers (Flight/Ground)

Question 3

The Trailing Edge Flaps and Leading Edge Devices are normally powered by

Answer 3

B

Question 4

How does placing a FLT CONTROL switch to STBY RUD affect the flight control panel lights?

Answer 4

STBY RUD ON light, Arms the LOW PRESSURE light

Question 5

How would a single channel failure of the Speed Trim system be indicated?

Answer 5

SPEED TRIM FAIL light on during Mstr Ctn Recall.

Question 6

Which system(s) help in identifying and controlling stalls?

Answer 6

Yaw Damper, Autoslat, Elevator Feel Shift, Speed Trim System, Stick shaker, SMYD

Question 7

What does the SMYD computers use to determine when a stall warning is necessary?

Answer 7

Angle of Attack, ADIRU inputs, A/Ice Controls, Wing Config, Thrust, FMC output, Mach

Question 8

How would a single channel failure of the Mach Trim system be indicated?

Answer 8

During MASTER CAUTION Recall: MACH TRIM FAIL (amber) light

Question 9

Can the Speed Trim System be overridden? If so, how?

Answer 9

Yes: - Control Wheel Trim Switches, manual rotation of Stabilizer Trim Wheel, engage AP

Question 10

What is the purpose of the stall warning “Stick Shaker”?

Answer 10

Warning of Impending Stall

Question 11

What is required to activate the Main Yaw Damper?

Answer 11

Hyd System B pressure, B FLT CONTROL switch in the ON, and SMYD computers providing continuous
system monitoring

Question 12

How are the Rudders, Ailerons, and Elevators operated in Manual Reversion?

Answer 12

Ailerons and elevators are operated manually via cables, No cables to rudder

Question 13

What would cause the Speed Brake lever to automatically stow after deployment on landing or RTO?

Answer 13

Either thrust lever advanced

Question 14

How is roll controlled with jammed spoilers? Jammed ailerons?

Answer 14

a. Ailerons jammed : F/O control wheel actuates the Aileron Transfer Mechanism, provides roll control
using the Flight Spoilers.
b. Spoilers jammed Captain’s control wheel provides roll control using the ailerons

Question 15

How is the horizontal Stabilizer Trim normally powered? Is there an alternative way?

Answer 15

Single electric trim motor. Stab Trim Switches on the control wheel or autopilot trim or Stabilizer Trim
Wheels

Question 16

. Through the use of the Alternate Flaps UP/DOWN switch, how are the Leading Edge Devices and Trailing Edge
Flaps operated?

Answer 16

LEDs hydraulic, Single tap down of Alt flap switch, Trailing edge flaps electrical, cont hold of switch
until at required position

Question 17

What is the purpose of the flap load relief system?

Answer 17

protects the trailing edge flaps from excessive air loads @ 15 or greater. Retracts the TE flaps one
stage.

Question 18

What protections are provided during an alternate flap extension?

Answer 18

None

Question 19

What is the purpose of the LE FLAPS TRANSIT light on the main panel, below the Trailing Edge Flaps indicator?

Answer 19

Indicates any LED in transit or LED is not in the correct position with respect to TE flaps
(disagreement), Or an LED uncommanded motion, or during alternate flap extension until all LE
devices are fully extended and TE flaps reach flaps10 (15 SFP Option)

Question 20

How is the Standby Yaw Damper activated?

Answer 20

FLT CONTROL sw A + B to STBY RUD. YAW DAMPER switch must be reset to ON

Question 21

When will the SPEEDBRAKES EXTENDED light illuminate?

Answer 21

a. Flight: SPEED BRAKE lever beyond the ARMED position, and: TE Flaps > 10, or RA< 800’
b. GND: Lever Down, Spoiler not Stowed

Question 22

What is the light logic on the Leading Edge Devices annunciator panel on the Aft Overhead?

Answer 22

Out: stowed, Amber: transit, Green: in commanded position