Flight controls Flashcards
How are the Primary Flight Controls controlled and actuated?
- Electronically by the FBW Fly-by-Wire System;
- Hydraulically actuated by PCUs (Power Control Units).
Which Hydraulic Systems power the Aileron PCUs?
- Left Aileron: Hydraulic System 1 and 3;
- Right Aileron: Hydraulic System 2 & 3.
Which Hydraulic Systems power the Elevator PCUs?
- Left Elevator: Hydraulic Systems 1 & 3;
- Right Elevator: Hydraulic Systems 2 & 3.
Which Hydraulic Systems power the Rudder PCUs?
All. Hydraulic Systems 1, 2 & 3.
What are the FBW Normal Mode tactile pitch protections?
- Progressive increase in required sidestick force as sidestick deflection is increased;
- Soft Stop in the pitch axis at the Operational Flight Envelope;
- Hard Stop at the sidestick travel limit in the pitch axis at the airplane Structural Limit;
- Stick Shaker.
Is the airplane aerodynamically stalled while maintaining Vaoa-hard (Hard-Stop)?
- 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
What is the Nose-Up pitch Attitude Limit in flight?
+30° Pitch-Up.
What is the Nose-Up pitch Attitude Limit on the ground?
+17.5° (to assist preventing tail-strike on takeoff).
What is the Nose-Down pitch Attitude Limit in flight?
20° Pitch-Down.
In FBW Normal Mode, what is the Maximum Bank Angle Limit?
80° Bank.
What is the maximum Bank for Pitch-Compensation?
33° Bank.
Is the Autopilot available in FBW Direct Mode?
NO
What are the 3 FBW Direct Modes?
- 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).
How do you regain FBW Normal Mode after a momentary PFCC failure?
All PFCCs must be reset by pressing the PBAs to OFF then ON.
What is the functionality of the ALTN FLAP PBA?
- 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.
What happens if the Rudder or Stab Trim is outside the allowable Takeoff range during thrust lever
advancement?
- “NO TAKEOFF” Aural Alert will sound.
- Red “CONFIG RUDDER TRIM” or “CONFIG STAB TRIM” CAS will be displayed;
What functions does the AP/PTY switch on the sidestick provide when pressed momentarily?
- Disconnects the AP if engaged;
- Selects sidestick momentary priority if the AP is not engaged.
What happens if both sidesticks operate simultaneously?
- “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.
What happens when the AP/PTY pushbutton is pressed and held?
- The AP, if engaged, disconnects;
- The opposite sidestick and its pitch trim switch are deactivated;
- The green PTY legend on the onside glareshield SIDESTICK guarded PBA flashes;
- A Red Arrow illuminates on the opposite SIDESTICK guarded PBA;
- 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.
What happens when the Guarded SIDESTICK PBA on the glareshield is pressed?
- 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.
Will Failure of the Flaps prevent operation of the Slats?
NO. The Slats and Flaps have independent dual-motor PDUs (Power Drive Units).
What is the purpose of the FLAPS OFF PBA on the TAWS Panel?
Used to cancel the aural warning with Speed below 159Kt, Altitude below 245Ft
and Flaps are not set at 4 with Gear Down.
How many Pairs of Spoiler Panels are located in Each Wing?
- 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.
What do the MFS panels provide?
- Roll assist;
- Speed Braking;
- Ground Lift Dumping
What is the activation logic of the Ground Spoilers?
- 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°.
Which Hydraulic System powers the Ground Spoilers?
Hydraulic System 1.
When in AFCU Direct Mode, what Spoilers are available?
NONE
How is the HSTAB (Horizontal Stabilizer) controlled and actuated?
- Electrically controlled;
- Electromechanically actuated by an MCE (Motor Control Electronic) unit.
How are the Spoilers controlled and actuated?
- Electrically controlled;
- Hydraulically actuated.
What are the G-Loads on the G7500?
- Clean: +2.5g & -1.0g;
- With Flaps: +2.0g & 0g.
