Supplement: Flight Controls Flashcards
Flight Control Panel:
What does ELAC stand for?
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Elevator Aileron Computer
Flight Control Panel:
How many ELACs are installed?
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2
Flight Control Panel:
What are the functions of the ELAC?
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º Normal elevator and stabilizer control º Normal aileron control º Normal pitch and roll º Alternate pitch º Direct pitch and roll º Abnormal attitude º Aileron droop º Acquisition of autopilot orders
Flight Control Panel:
Under Normal Law, what does ELAC 1 control?
QRH OPS.07A
º Primary – Aileron control (roll)
º Standby – Elevator / Trimmable Horizontal Stabilizer control (backs up ELAC 2)
Flight Control Panel:
Under Normal Law, what does ELAC 2 control?
QRH OPS.07A
º Primary – Elevator / Stabilizer (pitch)
º Standby – Aileron control (backs up ELAC 1)
Flight Control Panel:
What does SEC stand for?
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Spoiler Elevator Computer
Flight Control Panel:
How many SECs are installed?
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3
Flight Control Panel:
What functions are performed by the SECs?
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º Normal roll (by controlling the spoilers)
º Speed brakes and ground spoilers (SEC 1 & 3 only)
º Alternate pitch (SEC 1 & 2 only)
º Direct pitch (SEC 1 & 2)
º Direct roll
º Abnormal attitude
Flight Control Panel:
Under Normal Law, what do the 3 SECs control?
QRH OPS.07A
º Primary – Spoiler control (roll)
º Standby – Elevator / Stabilizer control (SEC 1 & 2 back up the ELACs)
Flight Control Panel:
What is the sole purpose of SEC 3 in Normal Law?
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Spoiler control (Spoilers 1 & 2 only)
Flight Control Panel:
What is the definition of FAC?
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Flight Augmentation Computer
Flight Control Panel:
How many FACs are installed?
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2
Flight Control Panel:
What are the functions of the FACs?
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º Normal roll (turn coordination and yaw damping)
º Rudder trim
º Rudder travel limit
º Alternate yaw
Flight Control Panel:
Under Normal Law, what do the FACs provide (YAWL)?
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º Y – Yaw Control – Damping and turn coordination, rudder limiter, rudder trim
º A – Airspeed Protection Computation (Alpha Protection, high / low limits, maneuvering speed, PFD
speed scale)
º W – Windshear protection (Reactive and not Predictive)
º L – Low Energy Warning Protection (“SPEED, SPEED, SPEED”)
Flight Control Panel:
Is full rudder deflection available during all flight regimes?
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No. Rudder deflection is limited as a function of airspeed
Flight Control Panel:
How are the flight control surfaces controlled and actuated?
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All surfaces are controlled electrically and actuated hydraulically
Flight Control Panel:
When is automatic pitch trim available?
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In flight under Normal Law with bank angle less than 33° with or without autopilot engaged
Flight Control Panel:
How is roll control normally achieved?
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1 aileron and 4 spoilers on each wing
Flight Control Panel:
If both FACs fail, is maximum rudder deflection available?
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Yes, after slat extension
Trimmable Horizontal Stabilizer:
How is the THS normally operated in flight?
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The flight control computers control trim functions automatically
Trimmable Horizontal Stabilizer:
If NO hydraulic power is available can the THS be positioned?
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No – the THS requires hydraulic power from the Green or Yellow systems
Trimmable Horizontal Stabilizer:
If a complete flight control computer failure occurs can the THS be positioned?
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Yes, mechanical trimming is possible by manually positioning the Pitch Trim Wheel
Trimmable Horizontal Stabilizer:
Can you move the PITCH trim wheel if all systems are working normally?
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Manual inputs have priority over computer inputs. The autopilot will disconnect
Trimmable Horizontal Stabilizer:
What happens to the THS when the aircraft enters into Ground Mode?
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The trim automatically resets to zero (inside the green band)
Glareshield / FCU:
What does the red arrow in the SIDE STICK PRIORITY light mean?
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It illuminates in front of the pilot losing authority
Glareshield / FCU:
How would you regain control if you had just lost sidestick authority?
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The last pilot to press the pushbutton on the sidestick will have authority. An aural “Priority Left” or
“Priority Right” will sound
Glareshield / FCU:
What do flashing green CAPT and F/O SIDESTICK PRIORITY lights indicate?
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Both sidesticks have been moved simultaneously and neither pilot has taken priority