Primary and Secondary Flying Controls Flashcards
What are the primary flying controls?
Aileron
Rudder
Elevator
What are the secondary flying controls?
Trim System
Flap System
Spoiler System
How are Aileron commands made?
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.
How are the control yokes connected?
The control yokes are connected to the forward, centre and wing torque tubes by a control cable circuit.
What is the movement range of the ailerons?
Their movement range is from -25° (trailing edge up) to +15 ° (trailing edge down).
What are the two components of the Elevator Control System?
Pitch Trim
Stall Warning and Protection System (SWPS)
What is the elevator pitch up and down range?
Their movement range is from -27° (pitch up) to +19° (pitch down).
What are the four elements of the trim system?
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
What are the trim power supplies?
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
What does the phenom flap system consist of?
It consists of 2 Fowler Flap Panels (one on each wing) controlled by the Flap Actuator System (FAS).
What is the FAS?
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.
What powers the FAS?
28 Volt DC Bus 1.
What does the FAS consist of?
Flap Selector Lever (FSL)
Flap System Control Unit (FSCU)
Flap Linier Actuators (FLA)
Flap Position Sensor Units (FPSU)
How do the flaps operate?
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.
What are the 4 flap readouts?
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).
Explain the Phenoms spoiler system
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.
What is the function of the spoiler system?
Pilot activated as Speed Brakes
Automatically deployed as Ground Spoilers
The spoilers are electrically controlled and hydraulically actuated.
How is the spoiler system powered?
Spoiler Control - 28 Volt DC Bus 1
Hydraulic Pump - 28 Volt DC Bus 2
What are the components of a spoiler system?
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
What is the purpose of the speed brake?
When acting as a speed brake, the spoilers can be deployed to increase drag and the aircraft’s rate of descent.
How is the speed brake operated?
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
When is the speed brake not available?
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
What is the purpose of a ground spoiler?
Operation of the ground spoilers increases drag and dumps lift on landing.
When does the ground spoiler function arm?
The ground spoiler function arms when LH Weight On Wheels (WOW) sensors indicate airborne.
