Flight controls

Question 1

How are the Primary Flight Controls controlled and actuated?

Answer 1

• Electronically by the FBW Fly-by-Wire System;
• Hydraulically actuated by PCUs (Power Control Units).

Question 2

Which Hydraulic Systems power the Aileron PCUs?

Answer 2

• Left Aileron: Hydraulic System 1 and 3;
• Right Aileron: Hydraulic System 2 & 3.

Question 3

Which Hydraulic Systems power the Elevator PCUs?

Answer 3

• Left Elevator: Hydraulic Systems 1 & 3;
• Right Elevator: Hydraulic Systems 2 & 3.

Question 4

Which Hydraulic Systems power the Rudder PCUs?

Answer 4

All. Hydraulic Systems 1, 2 & 3.

Question 5

What are the FBW Normal Mode tactile pitch protections?

Answer 5

• 1. Progressive increase in required sidestick force as sidestick deflection is increased;
• 2. Soft Stop in the pitch axis at the Operational Flight Envelope;
• 3. Hard Stop at the sidestick travel limit in the pitch axis at the airplane Structural Limit;
• 4. Stick Shaker.

Question 6

Is the airplane aerodynamically stalled while maintaining Vaoa-hard (Hard-Stop)?

Answer 6

• NO. However if environmental factors such as turbulence or windshear cause airspeed to decrease below
  Vaoa-hard, the airplane may stall in FBW Normal mode momentarily as the airplane pitch is adjusted to
  regain Vaoa-hard

Question 7

What is the Nose-Up pitch Attitude Limit in flight?

Answer 7

+30° Pitch-Up.

Question 8

What is the Nose-Up pitch Attitude Limit on the ground?

Answer 8

+17.5° (to assist preventing tail-strike on takeoff).

Question 9

What is the Nose-Down pitch Attitude Limit in flight?

Answer 9

20° Pitch-Down.

Question 10

In FBW Normal Mode, what is the Maximum Bank Angle Limit?

Answer 10

80° Bank.

Question 11

What is the maximum Bank for Pitch-Compensation?

Answer 11

33° Bank.

Question 12

Is the Autopilot available in FBW Direct Mode?

Answer 12

NO

Question 13

What are the 3 FBW Direct Modes?

Answer 13

• PFCC Direct (Primary Flight Control Computer) - (3 PFCCs);
• REU Direct (Remote Electronic Unit) – (11 REUs) – (Loss of all REUs: On 1 Control Axis);
• AFCU Direct (Alternate Flight Control Unit).

Question 14

How do you regain FBW Normal Mode after a momentary PFCC failure?

Answer 14

All PFCCs must be reset by pressing the PBAs to OFF then ON.

Question 15

What is the functionality of the ALTN FLAP PBA?

Answer 15

• It will extend the Flaps to position 2;
• Note: the Slats and Flaps begin movement only if the airspeed is at or below 200 Kt.

Question 16

What happens if the Rudder or Stab Trim is outside the allowable Takeoff range during thrust lever
advancement?

Answer 16

• “NO TAKEOFF” Aural Alert will sound.
• Red “CONFIG RUDDER TRIM” or “CONFIG STAB TRIM” CAS will be displayed;

Question 17

What functions does the AP/PTY switch on the sidestick provide when pressed momentarily?

Answer 17

• Disconnects the AP if engaged;
• Selects sidestick momentary priority if the AP is not engaged.

Question 18

What happens if both sidesticks operate simultaneously?

Answer 18

• “DUAL INPUT” aural warning message is heard;
• Red DUAL annunciation is displayed on both PFDs;
• Total summed input signal of both sidesticks is limited to the maximum deflection of a single sidestick.

Question 19

What happens when the AP/PTY pushbutton is pressed and held?

Answer 19

• 1. The AP, if engaged, disconnects;
• 2. The opposite sidestick and its pitch trim switch are deactivated;
• 3. The green PTY legend on the onside glareshield SIDESTICK guarded PBA flashes;
• 4. A Red Arrow illuminates on the opposite SIDESTICK guarded PBA;
• 5. A “PRIORITY LEFT” or “PRIORITY RIGHT” aural message is annunciated once;
• Note: When both AP/PTY pushbuttons are pressed, the last one pressed has priority;
• Note: If the AP/PTY pushbuttons are pressed simultaneously, the Left sidestick has priority.

Question 20

What happens when the Guarded SIDESTICK PBA on the glareshield is pressed?

Answer 20

• Indications of a latched sidestick are identical to momentary priority with the following exceptions:
• The AP, if engaged, does NOT disconnect;
• The green PTY legend on the onside glareshield SIDESTICK PBA remains ON without flashing;
• Note: pressing the AP/PTY pushbutton on the disabled sidestick has no effect;
• Note: pressing the guarded SIDESTICK PBA on the disabled side transfers the sidestick priority.

Question 21

Will Failure of the Flaps prevent operation of the Slats?

Answer 21

NO. The Slats and Flaps have independent dual-motor PDUs (Power Drive Units).

Question 22

What is the purpose of the FLAPS OFF PBA on the TAWS Panel?

Answer 22

Used to cancel the aural warning with Speed below 159Kt, Altitude below 245Ft
and Flaps are not set at 4 with Gear Down.

Question 23

How many Pairs of Spoiler Panels are located in Each Wing?

Answer 23

• 4 pairs of Spoilers Total:
• 3 MFS (Multi-Function Spoilers) each wing/ Total of 6 MFS.
• 1 GS (Ground Spoiler) each wing / Total of 2 Ground Spoilers.

Question 24

What do the MFS panels provide?

Answer 24

• Roll assist;
• Speed Braking;
• Ground Lift Dumping

Question 25

What is the activation logic of the Ground Spoilers?

Answer 25

• Either MLG is weight-on-wheels, and
• Either MLG wheel speed is greater than 16 Kt, and one of the following:
  -RAD ALT below 7 Ft, or
• Both MLG are weight-on-wheels and airplane pitch angle less than 2°.

Question 26

Which Hydraulic System powers the Ground Spoilers?

Answer 26

Hydraulic System 1.

Question 27

When in AFCU Direct Mode, what Spoilers are available?

Answer 27

NONE

Question 28

How is the HSTAB (Horizontal Stabilizer) controlled and actuated?

Answer 28

• Electrically controlled;
• Electromechanically actuated by an MCE (Motor Control Electronic) unit.

Question 29

How are the Spoilers controlled and actuated?

Answer 29

• Electrically controlled;
• Hydraulically actuated.

Question 30

What are the G-Loads on the G7500?

Answer 30

• Clean: +2.5g & -1.0g;
• With Flaps: +2.0g & 0g.