ATA 27 Flight Controls

Question 1

Are any of the PRIMARY flight controls “fly by wire”?

Answer 1

Nope

Question 2

System A (or B) flight controls hydraulic package have shutoff valves controlling pressure to which components?

Answer 2

Aileron PCU
Elevator PCU
Main Rudder PCU
Elevator Feel Computer

Question 3

Where are the aileron PCUs located?

Answer 3

Left Forward bulkhead of the main landing gear wheel well

Question 4

Aileron trim is operated by _______________________________.
Aileron feel is provided by___________________.

Answer 4

Electric trim actuator. Aileron feel and centering unit.

Question 5

What are the hydraulic pressure sources that can be used to operate the rudder?

Answer 5

System A and System B, and standby rudder system

Question 6

Describe operation of the elevator tabs.

Answer 6

When the Trailing edge flaps are up the tabs balance the elevator. As the elevator moves the tabs move in the opposite direction.

Question 7

List the functions of SMYD one.
.

Answer 7

Controls main rudder PCU during normal operations.
Primary yaw dampening
stick shaker
auto slat
increases elevator feel force during stall.

Question 8

List the functions of SMYD two

Answer 8

WTRIS
Stall Management Yaw Dampening
Stick shaker
Autoslat

Question 9

During a stall elevator feel forces increase, what components cause this function.

Answer 9

Input from SMYDS
Elevator feel shift module(EFSM), elevator feel computer and dual feel actuator.

Question 10

What inputs can cause the stabilizer to trim?

Answer 10

stabilizer trim switches

Question 11

What are the power sources that can move the TE flaps?

Answer 11

System B hydraulics only and alternate for flaps is the EMDP.

Question 12

The flap indicator has split needles, what could this mean?

Answer 12

Asymmetry, uncommented motion, or skew condition

Question 13

Where is TE flap indication provided?

Answer 13

Pilots side MDS

Question 14

Where are the flap skew sensors located?

Answer 14

There are eight sensors one at each flap drive mechanism.

Question 15

List the ways that the flap bypass can move to bypass.

Answer 15

TE Flap Asymmetry
TE Flap Skew
TE Flap uncommented motion
Alternate Flap operation

Question 16

Flight spoilers are numbered________________________________.

Answer 16

Left Wing panels: 2,3,4, and 5
Right Wing panels: 8,9,10,11.

Question 17

What functions do the flight spoilers provide?

Answer 17

Roll control, and assist with increasing drag and reducing lift on landing and rejected takeoff, as well as helping control aircraft if the elevator is jammed.

Question 18

How many ground spoiler panels and actuators are there?

Answer 18

4 panels, 6 actuators(2 for both inboard ground spoilers and 1 for both outboard ground spoilers).

Question 19

What is the pressure source for the ground spoilers?

Answer 19

System A

Question 20

What component prevents the ground spoilers from deploying in flight?

Answer 20

SCE

Question 21

What programs movement of the L E devices?

Answer 21

Trailing Edge Flap System

Question 22

Why does the autoslat valve have two control solenoids?

Answer 22

Redundancy(If one valve fails or SMYD has a failure the pressure still goes to the actuators).

Question 23

What are the possible hydraulic power sources for leading edge devices?

Answer 23

PTU, Standby and System B

Question 24

What does the green leading edge flaps extend light mean?

Answer 24

Leading edge flaps are extended/takeoff

Question 25

Where is the green leading edge flaps extend light located?

Answer 25

P-5 overhead panel

Question 26

What is the maximum control wheel rotation?

Answer 26

plus or minus 10 units(60 degrees) of control wheel rotation

Question 27

What does WTRIS do?

Answer 27

Helps to make coordinated turns using the standby hydraulic system

Question 28

Where is the balance bay?

Answer 28

Sealed inside the wing

Question 29

Are spoilers considered primary flight controls?

Answer 29

No, they are secondary

Question 30

What does each transmission have?

Answer 30

A torque brake which prevents excessive loads on the ball-screw if the flap does not move freely.

Question 31

What does a no-back break on each transmission do?

Answer 31

Makes it so that the motors can run the flaps but the flaps can’t run the motor

Question 32

What do the needles look like in asymmetry?

Answer 32

9 degrees apart

Question 33

What do the needles look like in an uncommand motion?

Answer 33

Both needles stop at the uncommand position

Question 34

What do the needles look like in a skew position?

Answer 34

The needles will split approximately 15 degrees and stop.

Question 35

What are the resolver difference limits?

Answer 35

28 degrees between skew sensor 1 and 8
28 degrees between skew sensors 2 and 7
26 degrees between skew sensors 3 and 8
34 degrees between skew sensors 4 and 5

Question 36

What does the Amber light on spoilers mean?

Answer 36

Tells pilots to land without spoilers

Question 37

Which flight spoilers can you not MEL?

Answer 37

5 and 8

Question 38

When does the autoslat operate?

Answer 38

Flap lever at 1,2,5,10,15, or 25
The airplane gets near a stall condition
Alternative operation is not active

Question 39

Where do autoslat commands come from?

Answer 39

Two units of SMYD.