Flight Controls

Question 1

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

Answer 1

Both A and B.

STBY - just rudder and LE devices

Question 2

What are the secondary flight controls?

Answer 2

High lift devices - trailing edge flaps, LE devices (flaps & LE slats)
Drag devices - speedbrakes
Roll augmentation - spoilers

Question 3

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

Answer 3

Yes, the Trailing Edge Flaps and LEDs are powered by Hydraulic System 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 illuminates
Arms STBY HYD LOW PRESSURE light
Respective flight control light extinguishes
If B system, will illuminate

Question 5

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

Answer 5

SPEED TRIM FAIL light during recall only
STS uses two FCCs (dual channel) - so you won’t get an indication unless both
FCCs are incapable of providing the STS function

Question 6

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

Answer 6

Yaw Damper
Elevator Feel Shift (EFS) Module Speed Trim System
Stall Management Yaw Damp Computer (SMYDs) calculate PLIs Also Autoslats

Question 7

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

Answer 7

AOA Sensor outputs 
ADIRU outputs 
anti-ice controls 
Wing configurations 
air/ground sensing 
thrust 
FMC outputs 
Mach compensation

Question 8

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

Answer 8

MACH TRIM FAIL during recall only

Question 9

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

Answer 9

Yes, by...use of electric trim or manual rotation of either Stabilizer Trim Wheel 
STS works when... 
- Airborne for 10+ seconds 
- No manual trim prior 5 seconds
- Senses a need for trim 
- A/P disengaged

Question 10

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

Answer 10

Designed to alert the pilots before a stall develops.

Question 11

What is required to activate the Main Yaw Damper?

Answer 11

Hydraulic System B pressure, the B FLT CONTROL switch in the ON (guarded) position, and no fault detected by SMYD computers

Question 12

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

Answer 12

Manually
Ailerons and elevator - mechanically with cables
Rudder - STBY hydraulic system (NOT CABLES)

Question 13

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

Answer 13

Either thrust lever advancing (think touch and go)

Question 14

How is roll controlled with jammed spoilers? Jammed ailerons?

Answer 14

Ailerons jammed = FO side only controls roll with SPOILERS

Spoilers jammed = Captain side only controls roll with AILERONS

Question 15

How is the horizontal Stabilizer Trim normally powered

Answer 15

Is there an alternative way?? a single electric trim motor (either with switch or autopilot) alternative way - manually rotating the trim wheel

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

LE devices are hydraulic using standby system and cannot be retracted
Trailing edge flaps revert to electrical operation (very slow)

Question 17

What is the purpose of the flap load relief system?

Answer 17

protects the trailing edge flaps from excessive loads/overspeed

Question 18

What protections are provided during an alternate flap extension?

Answer 18

No protections - you lose asymmetry and skew protections + more

Question 19

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

Answer 19

LE FLAPS TRANSIT - in transit or disagree with scheduled position AND during alternate flaps extension until LE devices are fully extended and TE flaps reach 15

Question 20

How is the Standby Yaw Damper activated?

Answer 20

Must be in manual reversion - both FLT CONTROL switches positioned to STBY RUD
YAW DAMPER switch reset to ON

Question 21

When will the SPEEDBRAKES EXTENDED light illuminate?

Answer 21

in flight - SPEED BRAKE lever beyond the ARMED position with TE Flaps extended more than Flaps 10 OR radio altitude less than 800 ft
on the ground - Speed brake panels still out with the handle stowed (disagree)
NOTE: On the ground, the SPEEDBRAKES EXTENDED light does not illuminate when Hydraulic System A pressure is less than 750 psi.

Question 22

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

Answer 22

Position status of individual LE flaps/slats
GREEN = position
YELLOW = in transit
EXTINGUISHED = retracted