FLIGHT CONTROLS Flashcards
Which hydraulic system powers the trailing edge flaps and leading edge slats and leading edge flaps?
System B
Which hydraulic systems normally power the rudder?
Systems A and B
What hydraulic system powers the rudder if system A and B are not available?
Stby hydraulic system
How many flight spoilers are there?
8
How many ground spoilers are there?
4
How many ailerons?
2
How many rudder?
1
How many elevators do we have?
2
During takeoff, the rudder becomes aerodynamically effective between 40 and 60 knots. True or False?
True
How many spoiler panels are there total on each wing?
6
Which control wheel is technically linked to the ailerons?
Captains.
Which control wheel is technically linked to the spoiler mixer in th NG or the SEC on the MAX?
First Officers
Hydraulic pressure shutoff valves are controlled by the two flight SPOILER switches. True or False?
True
When the control wheel is displaced more than approximately how many degrees, spoiler deflection is initiated?
10 degrees
Is there manual reversion with regard to the elevators and ailerons?
Yes
How is the stabilizer normally moved?
Electrically
Can you trim the stabilizer manually?
Yes by moving the wheel
How many electric motors are there for the stabilizer trim?
1 electric motor
Explain Elevator Control Column Override Mechanism?
In the event of a control column jam, an override mechanism allows the control columns to be physically separated. Applying force against the jam will breakout either the captain’s or first officer’s control column. Whichever column moves freely after the breakout can provide adequate elevator control.
Explain Elevator Jam Landing Assist System available in the MAX aircraft?
If a jam occurs in the aft elevator control mechanism, both control columns have a limited range of motion. During approach and landing, the Elevator Jam Landing Assist System uses the flight spoilers for small changes to the flight path. To activate the system, the Elevator Jam Landing Assist switch must be selected ON, the actual flap position must be 1 or greater, and the autopilot must be disengaged.
With the system activated, the flight spoilers deploy to a preset position. The control
wheel steering force sensors detect forces applied to the control column. A push on
the control column causes the spoilers to extend farther, increasing the descent rate.
A pull on the control column causes the spoilers to retract, decreasing the descent
rate.
What are the conditions to use the Elevator Jam Landing Assist System in the MAX?
Elevator Jam Landing Assist switch must be selected ON
Auto pilot off
Flaps 1 or greater
FEEL DIFF PRESS light. What does it mean?
When either hydraulic system or elevator feel pitot system fails, excessive differential hydraulic pressure is sensed in the elevator feel computer and the FEEL DIFF PRESS light illuminates.
How does the mach trim system work?
A Mach trim system provides speed stability at the higher Mach numbers. Mach trim is automatically accomplished above Mach .615 by adjusting the elevators with respect to the stabilizer as speed increases.
Where does the mach trim system get mach information from?
The flight control computers use Mach information from the ADIRU to compute a Mach trim actuator position.
With the autopilot engaged, stabilizer trim is accomplished through the autopilot stabilizer trim circuit. True or False?
True
Stabilizer trim switches on each control wheel actuate the electric trim motor through the main electric stabilizer trim circuit when the airplane is flown manually. True or False?
True
What are the two modes for the main electric trim and the auto trim?
High speed - Flaps extended
Low speed - Flaps retracted
What happens if you use main electric trim with the auto pilot engaged?
Auto pilot disengages
On the NG, the STAB TRIM MAIN ELECT cutout switch and the STAB TRIM AUTOPILOT
cutout switch, located on the control stand, are provided to allow the autopilot or
main electric trim inputs to be disconnected from the stabilizer trim motor. True or False?
True
What is the function of the STAB TRIM override switch?
When the STAB TRIM override switch is positioned to OVERRIDE, electric trim can be used regardless of control column position.
What does the control column actuated stab trim cutout switches do?
Control column actuated stabilizer trim cutout switches stop operation of the main
electric and autopilot trim when the control column movement opposes trim
direction.
Once you place the STAB TRIM override switch to override, will autopilot trim work anymore?
No. Only manual electric trim will work
Does manual trim using the wheel, have more authority range than autopilot and electric trim?
Yes
What is the functional difference in regard to the stab trim cutout switches on the MAX?
The STAB TRIM PRI cutout switch and the STAB TRIM B/U cutout switch are
located on the control stand. If either switch is positioned to CUTOUT, the
autopilot, main electric and Speed Trim System (Speed Trim function and MCAS
function) trim inputs are disconnected from the stabilizer trim motor.
In the MAX, what additional pitch stability augmentation system is part of the speed trim system?
MCAS
With regard to the MAX, the control column actuated stab trim cut out switches cuts out which trim systems?
Control column actuated stabilizer trim cutout switches interrupts operation of main
electric stabilizer trim, autopilot trim and the Speed Trim function when the control
column movement opposes trim direction.
With regard to the MAX, does the control column actuated stab trim cut out switches cuts out the MCAS system since its a part of the speed system in the MAX?
No. It will not affect MCAS. Only the speed trim system part will be affected.
Aft control column movement does not interrupt Maneuvering Characteristics Augmentation System (MCAS) nose down trim commands. True or False?
True