Flight Controls

Question 1

Question: The fly-by-wire flight control system has 4 different modes of operation. What are they?

Answer 1

Answer: Normal, Alternate, Direct, and Backup

Question 2

Question: How many computers control the flight control system?

Answer 2

Answer: 2 Computers: (2) Flight Control Computers (FCC) and (1) Back Up Control Unit in case both FCCs fail.

Question 3

Question: Describe cyan CAS message FCC AOA LIMITING.

Answer 3

Answer: In this mode full stick input commands maximum nose angle of attack of .95.

Question 4

Question: What is the Auto Retract feature for speed brakes?

Answer 4

Answer: It retracts speed brakes at high power settings or when gear selected down.

Question 5

Question: What is the MAX alt for:

Answer 5

Flaps 10 or 20, Answer: FL250
Flaps Down, Answer: FL 200

Question 6

Question: What is the Maneuvering speed for the G700?

Answer 6

206 kts

Question 7

Question: Is there any limitation with the Spoiler Panel failure?

Answer 7

Answer: Flight Control Surface Failure:

If any primary flight control surface or speed brake panel is failed, caused by either a component malfunction(s) or a hydraulic system failure, do not exceed 285 KCAS / 0.90M.

Question 8

Question: What are some of the reasons that would cause the FCCs to drop to Alternate mode?

Answer 8

Answer:
Less than two valid Inertial Reference signals,
OR Less than two valid Air Data Sources
OR HSTS in secondary mode

Question 9

Question: Can the Alternate Flight Controls mode be restored to NORMAL mode?

Answer 9

Answer: Yes, if the problem that got the FCCs into this mode has been corrected with the selection of FLT CTRL RESET if directed to do so by Checklist.

Question 10

Question: What are some of the impacts associated with operating in Alt Flight Control Mode?

Answer 10

Answer: No Auto Pilot

Two Fixed Gains (340 Kts and 250 Kts)
No TSS
No Turn Coordination
No AOA Limiting
No High Speed Protect
Side Stick MAY revert to Degraded Active Mode (NO SHAKER)
No Maneuver Load Alleviation

Question 11

Question: When in Alt Flight Control Mode when will Fixed Gains change from 340 kts to 250 kts?

Answer 11

Answer: Gear Handle down or Flap handle not UP

Question 12

Question: What is the function of the Trim Speed System (TSS)?

Answer 12

Answer: With the Auto Pilot OFF, the TSS button resets the trim speed at your current speed.

Question 13

Question: Will the TSS function operate during STEEP TURNS?

Answer 13

Answer: Yes, but it will not trim out the force required to maintain level flight.

45° bank requires 1.4 Gs to maintain altitude

Question 14

Question: What are some of the limitations associated with operating aircraft with degraded flight control, other than airspeed 285/.90 or less.

Answer 14

Answer:

Flight into known icing conditions is prohibited when operating in a flight control law mode other than Normal (Alternate, Direct or Backup). If the flight control law mode degrades from normal while in icing conditions, exit icing conditions as soon as possible.

Note The AOA limiting / stall protection system is only available in the normal flight control mode. Stick shaker / stall warning is provided in Alternate mode at 0.85 AOA .

Intentional degradation from normal mode or disabling of any flight control system is prohibited.

Takeoff is prohibited when operating in a flight control law mode other than Normal (Alternate, Direct or Backup).

Wind Conditions:

Maximum crosswind component for landing when operating in a flight control law mode other than Normal (i.e., Alternate, Direct, or Backup): 10 knots

Question 15

Question: What’s the purpose of the A/P DISC switch?

Answer 15

Answer: It disengages the autopilot – First PRESS
Answer: Stops runaway trim in all three axes – First PRESS
Answer: Silences the AP DISC warning – Second PRESS
Answer: Extinguishes the flashing red AP1 / AP2 on PFD – Second PRESS
Answer: Trim speed sync (TSS) – Autopilot OFF – First PRESS

Question 16

Question: Any other ways to disconnect the AP?

Answer 16

Answer: Override the flight controls (Active Flight Control Stick) (4 lbs) Answer: Select the AP OFF on the guidance panel.

Answer: Use any of the pitch or roll trim switches.

Question 17

Question: What happens if All FCC channels are degraded?

Answer 17

Answer: The flight control system reverts to the Direct Mode

Question 18

Question: What happens if all four (4) FCC channels are unable to compute the control law?

Answer 18

Answer: Backup Flight Control Unit (BFCU) will activate to provide a “get home” capability

Question 19

Question: What’s the function of the FLT CTRL RESET switch?

Answer 19

Answer: Used to reset Flight Control Computers and Control Surface Actuators when directed by a checklist.

Question 20

Question: When is stall protection not available?

Answer 20

Answer:

• Air data is not valid (AOA, Mach number, Calibrated Airspeed, Static Pressure, or Pressure Altitude)
• Flight control mode is Alternate or Direct Mode
• Flap Position is not valid
• Loss of communication between FCCs

Question 21

Question: What are the requirements for Ground Spoilers deployment?

Answer 21

Answer: Throttles Idle and one of the following:

Both main gear WOW, or
Left WOW and Right wheel Spin Up, or
Right WOW and Left wheel Spin Up, AND
Radar Alt. <10’.

Question 22

Question: What causes the spoilers to stow during landing?

Answer 22

Answer: After landing, ground spoilers retract

1. 10 seconds after wheel and air speeds are both below 42 knots or
2. immediately after either throttle is not at idle or
3. immediately if either MLG WOW is in air.
4. Slow Wheel spin
5. RA > 10 feet

Question 23

Question: When does the Stab return to zero after landing?

Answer 23

Answer: 20 seconds after ground spoilers stow, the FCC commands a post-flight BIT of control surface and stab actuators.

The stab will return to zero as soon as the post-flight BIT completes.

Question 24

Question: What happens if you attempt to extend the flaps at a high rate of speed?

Answer 24

Answer: A load limiter device prevents the flaps from extending

Question 25

Question: What is the elevator off-load feature?

Answer 25

Answer: Once elevator deflection exceeds preset value for a predetermined amount of time, the horizontal stabilizer and elevators move simultaneously: the horizontal stab moves to a new trim position as the elevators move to “faired” position. Controlled by FCCs.

Question 26

Question: Describe the Return-To-Zero function.

Answer 26

Answer: FCCs commands stabilizer, roll trim and Yaw trim to return-to zero after landing