Flight Controls

Question 1

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

Answer 1

Both A and B.
SH 9.010 pg 2
STBY - just rudder and LE devices + thrust reversers

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
SH 9.010 pg 3

Question 3

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

Answer 3

the Trailing Edge Flaps and LEDs are powered by Hydraulic System B
SH 9.010 pg 3

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 LOW PRESSURE light extinguishes
If B system, YAW DAMPER will illuminate
SH 9.010 pg 5

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
SH 9.010 pg 20

Question 6

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

Answer 6

Yaw Damper
Elevator Feel Shift (EFS) Module
Speed Trim System
Stall Management Yaw Damp Computer (SMYDs) calculate PLIs
Also Autoslats
SH 9.010 pg 22

Question 7

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

Answer 7

WAAAT FMA

AOA Sensor outputs
ADIRU outputs
Anti-ice controls
Wing configurations
Air/ground sensing 
Thrust
FMC outputs
Mach compensation
SH 9.010 pg 23

Question 8

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

Answer 8

MACH TRIM FAIL during recall only

SH 9.010 pg 12

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
SH 9.010 pg 20

Question 10

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

Answer 10

Designed to alert the pilots before a stall develops.

SH 9.010 pg 22

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
SH 9.010 pg 31

Question 12

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

Answer 12

Manually
Ailerons and elevator - mechanically with cables

Rudder - STBY hydraulic system (NOT CABLES)
But there are No Protections
SH 9.010 pg 5

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)

SH 9.010 pg 38

Question 14

How is roll controlled with jammed spoilers? Jammed ailerons?

Answer 14

Ailerons jammed = FO side only controls roll with SPOILERS FAS
Spoilers jammed = Captain side only controls roll with AILERONS CAS
SH 9.010 pg 10 - Aileron Transfer Mechanism\

Question 15

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

Answer 15

main electric trim motor (either with switch or autopilot)
alternative way - manually rotating the trim wheel
SH 9.010 pg 15

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)
SH 9.010 pg 51

Question 17

What is the purpose of the flap load relief system?

Answer 17

• protects the trailing edge flaps from excessive loads/overspeed
• retracts flaps automatically to next lower setting until speed decreases, automatically re extends flaps to selected setting.

flaps >10

SH 9.010 pg 49

Question 18

What protections are provided during an alternate flap extension?

Answer 18

No protections - you lose asymmetry and skew protections + more
SH 9.010 pg 52

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
SH 9.010 pg 39

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

(This is the one where he said that if you JUST have a YD failure, it’s much better to fly without a YD than to put ALL your controls into manual reversion just to activate the standby YD)
SH 9.010 pg 32

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.
SH 9.010 pg 35

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
SH 9.010 pg 38