Primary and Secondary Flying Controls

Question 1

What are the primary flying controls?

Answer 1

Aileron
Rudder
Elevator

Question 2

What are the secondary flying controls?

Answer 2

Trim System
Flap System
Spoiler System

Question 3

How are Aileron commands made?

Answer 3

By the rotation of the control yokes or by the autopilot servo actuation. The roll control system consists of left and right aileron surfaces attached to the rear spar of the wing outboard trailing edge.

Question 4

How are the control yokes connected?

Answer 4

The control yokes are connected to the forward, centre and wing torque tubes by a control cable circuit.

Question 5

What is the movement range of the ailerons?

Answer 5

Their movement range is from -25° (trailing edge up) to +15 ° (trailing edge down).

Question 6

What are the two components of the Elevator Control System?

Answer 6

Pitch Trim
Stall Warning and Protection System (SWPS)

Question 7

What is the elevator pitch up and down range?

Answer 7

Their movement range is from -27° (pitch up) to +19° (pitch down).

Question 8

What are the four elements of the trim system?

Answer 8

Roll Trim through a trim tab on the left aileron
Yaw Trim through a trim tab on the rudder
Normal Pitch Trim through trim tabs on both elevators
Backup Pitch Trim through trim tabs on both elevators

Question 9

What are the trim power supplies?

Answer 9

Normal Mode Pitch - 28 Volt DC Bus 2

Backup Mode Pitch Trim - 28 Volt DC Emergency Bus

Roll Trim - 28 Volt DC Bus 1

Yaw Trim - 28 Volt DC Bus 1

Question 10

What does the phenom flap system consist of?

Answer 10

It consists of 2 Fowler Flap Panels (one on each wing) controlled by the Flap Actuator System (FAS).

Question 11

What is the FAS?

Answer 11

The FAS is an electromechanical system using electronic synchronisation to provide flap position monitoring and control. There are no mechanical links between the two flap panels.

Question 12

What powers the FAS?

Answer 12

28 Volt DC Bus 1.

Question 13

What does the FAS consist of?

Answer 13

Flap Selector Lever (FSL)
Flap System Control Unit (FSCU)
Flap Linier Actuators (FLA)
Flap Position Sensor Units (FPSU)

Question 14

How do the flaps operate?

Answer 14

The flap position selected through the FSL in the cockpit sends an electrical signal to the FSCU. The FSCU controls the FLA (comprising a flap motor and brake), synchronizes the right and left flap panel actuation, and monitors flap panel position. The FPSU is connected mechanically to each flap panel by the linkage arm and provides redundant position feedback to FSCU. If a failure occurs or an unsafe condition is detected, the flap panel operation is halted and the CAS message FLAP FAIL is displayed.

Question 15

What are the 4 flap readouts?

Answer 15

Green: Valid flap position. A green dash indicates flap in transit.

Yellow: Flap system has failed or become jammed, or the FSL position is lost or invalid, but position information is available. A dash indicates flap position is lost or invalid.

Red: Before take-off, flap is out of position. A red cross indicates all information about flap is lost.

Blue: Inoperative flap system (maintenance).

Question 16

Explain the Phenoms spoiler system

Answer 16

The Spoiler system has two spoiler panels, one on each wing, attached to the rear spar at the inboard trailing edge by two piano type hinges.

Question 17

What is the function of the spoiler system?

Answer 17

Pilot activated as Speed Brakes

Automatically deployed as Ground Spoilers

The spoilers are electrically controlled and hydraulically actuated.

Question 18

How is the spoiler system powered?

Answer 18

Spoiler Control - 28 Volt DC Bus 1
Hydraulic Pump - 28 Volt DC Bus 2

Question 19

What are the components of a spoiler system?

Answer 19

Two Spoiler Panels
Two Hydraulic Actuators - one per panel
Two Proximity Switches - one per panel
A Hydraulic Command Circuit with:
One Shut-Off Valve
One Control Valve
One Thermal Relief Valve
One Electrical Control Circuit
One Speed Brake switch in the cockpit

Question 20

What is the purpose of the speed brake?

Answer 20

When acting as a speed brake, the spoilers can be deployed to increase drag and the aircraft’s rate of descent.

Question 21

How is the speed brake operated?

Answer 21

Speed brake operation is commanded by a switch located on the centre console in the cockpit and has 2 selections: OPEN or CLOSED.
When speed brake switch is selected to OPEN, spoiler panels deploy to 31.5°
When the switch is selected to CLOSE, spoiler panels close to their fully retracted position

Question 22

When is the speed brake not available?

Answer 22

Indicated Airspeed less than or equal to 182 kts
Both Thrust Levers are set greater than MAX CRZ
Flaps extended beyond 4°
Aural over-speed warnings being issued

Question 23

What is the purpose of a ground spoiler?

Answer 23

Operation of the ground spoilers increases drag and dumps lift on landing.

Question 24

When does the ground spoiler function arm?

Answer 24

The ground spoiler function arms when LH Weight On Wheels (WOW) sensors indicate airborne.

Question 25

When do the ground spoilers automatically deploy?

Answer 25

During landing, the spoilers automatically deploy as ground spoilers when both Thrust Levers are set to IDLE position and one of the following conditions occurs:

Both LH and RH WOW signals indicate aircraft is on the ground.

Both LH and RH wheel speed sensors indicate the wheels are spinning above 45 kts

One WOW sensor indicates the wheel is on ground and it’s speed sensor indicates the wheel is spinning above 45 kts

Question 26

What is the spoiler deflection?

Answer 26

31.5°

Question 27

When would the spoilers retract in a go around situation?

Answer 27

The ground spoilers retract when any thrust lever is advanced above IDLE.

Question 28

What do the ground spoilers do on landing?

Answer 28

On a full stop landing the ground spoiler function is disarmed and the spoilers retract automatically 30 seconds after touchdown.