E2 Flight Controls

Question 1

TRIM PANEL

The respective HSCU channel becomes unavailable until the next FCC reset, or after maintenance intervention, After…

Answer 1

three consecutive disconnections

Question 2

FLIGHT CONTROL MODE BUTTON (GUARDED)

– In air, whenever the system conditions permit, reverts the flight control system either from Normal Mode to Direct Mode, or from Direct Mode to Normal Mode. The system supports up to

Answer 2

five transitions. After the fifth transition, only Direct Mode is available.

Question 3

The Yaw Trim function is inhibited while the airplane is

Answer 3

on the ground

Question 4

The Roll Trim function is inhibited while the airplane is

Answer 4

on the ground or in flight with the AP engaged.

Question 5

the respective HSCU channel becomes unavailable until the next FCC reset, or after maintenance intervention, After

Answer 5

three consecutive disconnections,

Question 6

The Normal Flight Envelope is defined as follows:

Answer 6

– Maximum operating speed (VMO/MMO).

– Bank angle up to 33°.

– Angle of attack (AOA shaker).

– Attitude angle (pitch between 15° down and 30° up)

Question 7

In the Normal Flight Envelope, the control system features the following functions:

Answer 7

– Turn Compensation (Turn Coordination and Lift Compensation in turns)

– Neutral spiral stability

– Uniform operation regardless of mass and weight distribution

– Automatic compensation for changes in configuration

– Elevator offload

– Pitch and yaw damping

– Rotation and de-rotation functions

– Best Beta function, and

– Thrust asymmetry compensation.

Question 8

The control column displacement is not directly related to an elevator deflection, but it is proportional to a

Answer 8

rate of change in the flight path angle. The control laws calculate and command the amount of elevator deflection needed for the maneuver.

Question 9

For takeoff, TSA function is ENABLED at estimated heights of less than

Answer 9

25 ft AGL

Question 10

For landing, TSA function is ENABLED below 25 ft AGL for Slat/Flap 0 to 5, and for Slat/Flap FULL.

Answer 10

below 45 ft AGL

Question 11

The FCCs and HSCU process the trim inputs with the following priority:

Answer 11

1. Backup switches.
2. Left seat switches.
3. Right seat switches

Question 12

In the event of an electrical emergency, trim commands are inhibited for

Answer 12

two seconds to avoid stalling of RAT

Question 13

The Best Beta Function is activated when the following conditions are met:

Answer 13

– Thrust asymmetry,

– Any TLA greater than 57°,

– Flaps less than 5

– Landing gear not locked down, and

– FCS in normal mode

Question 14

After touchdown the FCCs command all multifunction spoiler and the dedicated ground spoiler surfaces to full deployment when the following conditions are simultaneously met:

Answer 14

– Weight on wheels on ground

– Wheel speed is above 45 kt or airspeed is above 60 KIAS.

– Thrust Lever Angle (TLA) below 26°

Question 15

The speed brakes automatically retract if extended or remain inhibit for deployment when commanded if any of the following conditions occur:

Answer 15

– Airspeed below 180 KIAS

– Thrust Lever Angle beyond 76°

– Slat/Flap Lever at position 1 and airspeed above 230 KIAS

– Slat/Flap Lever at position 2 or above

– Stall Protection function is active.

Question 16

Direct Mode is engaged automatically after loss of inertial or air data sensing, or manually by the flight crew when pressing the button in Flight Control Mode Panel. Direct Mode requires the following minimum operational sensor configuration:

Answer 16

– Any two inertial sensor units.

– Any single ADSP

Question 17

In normal mode, the lateral control laws automatically provide turn coordination. Turns are performed without the need to apply

Answer 17

pedal, since the control law automatically deflects the control surfaces to maintain turn coordination

Question 18

When the airplane is in air with normal mode, pedal deflections correspond to a sideslip demand. The control laws calculate and send to actuators the surface commands to achieve the desired sideslip instead of

Answer 18

directly position rudder surface. The airplane rolls like a conventional airplane when pedal is applied, while maintaining the appropriate sideslip specified by the pedal position.

Maximum pedal deflection corresponds to a demand of the maximum sideslip allowable by the control laws to avoid structural damage.