Flight Controls Flashcards
What powers the Power Control Units (PCU) that move various flight controls?
Hydraulic pressure
The trailing rudder deflects at _____ the rate of the fore rudder rate.
2x
The trailing rudder is connected to the fore rudder by which component?
Geared push rods
What controls the distance the rudder can travel?
2 systems:
Flaps setting
FCECU based on airspeed
What is the distance the rudder can travel either side of center when the flaps are set to 0 degrees?
12 degrees left or right of center
With the flaps set to 5 degrees or greater, what is the maximum rudder travel either side of center?
18 degrees of travel either side of center
T/F: At low speeds, the FCECU does not limit hydraulic pressure to the rudder.
TRUE
T/F: At low speeds, the FCECU limits hydraulic pressure to the rudder.
FALSE, at low speeds it does not limit pressure providing greater travel
T/F: At high airspeeds, hydraulic pressure to the rudder is reduced.
TRUE
T/F: At high airspeeds, hydraulic pressure to the rudder is not limited.
FALSE, it is limited to reduce the rudder deflection
How do pilots know if the elevator trim position signal fails?
Elevator trim pointer indicates off-scale (can be off scale nose down or nose up)
T/F: If the trim position signal fails, the trim still operates normally.
TRUE
What provides roll control for the aircraft?
2 ailerons and 4 spoilers
T/F: The ailerons are directly operated by the First Officer’s control column.
TRUE
T/F: The ailerons are directly operated by the Captain’s control column.
FALSE, they are linked, but the spoilers are directly operated by the Captain’s control column
The ailerons are mechanically controlled and _____.
Cable operated
The spoilers are mechanically controlled and _____.
Hydraulically operated
T/F: The aircraft has a roll disconnect handle that allows the control wheels to be separated in the event of an aileron or spoiler jam.
TRUE
How far will the control yokes travel to either side?
70 degrees
Give 17 degrees of aileron travel either side of center
Which direction does the geared tab move on the aileron?
Opposite direction of the aileron to reduce control forces
T/F: The aileron trim should be used when autopilot is engaged.
FALSE, that will cause MISTRIM condition
T/F: Aileron trim should be used when autopilot is not engaged.
TRUE
Which hydraulic system control the inboard spoilers?
1
Which hydraulic system controls the outboard spoilers?
2
When operating at airspeeds greater than _____ kts, the FCECU inhibits outboard spoiler movement.
170 kts
At decreasing airspeeds less than _____ kts, both outboard spoilers are active.
165 kts
The inboard and outboard spoilers will fully extend after landing when _____.
The spoiler switch is in FLIGHT position
Both power levers are at or less than FLIGHT IDLE
PSEU is receiving a Weight on Wheels (WOW) signal from the left and right main landing gear
The inboard and outboard spoilers will fully extend after landing when _____.
Spoiler switch is in FLIGHT position
Both power levers are at or aft of the FLIGHT IDLE gate
PSEU receives a weight on wheels (WOW) signal from the left and right landing gear
The inboard and outboard spoilers are fully extended after landing when _____.
The ROLL INBD and ROLL OUTBD advisory lights are illuminated
Also PFCS will show all 4 extended
T/F: If there is a jam in the spoiler PCU linkage, the spoiler clutch mechanism will remove the spoiler from the PCU.
TRUE
The elevators are mechanically controlled and _____.
Hydraulically operated
The Captain’s yoke is directly connected to which elevator side?
Left side elevator
How many hydraulic PCUs power the left side of the elevator?
3 PCUs
How many total hydraulic PCUs power the whole elevator?
6 PCUs
3 on each side
How many hydraulic PCUs power the right side of the elevator?
3 PCUs
Who/what has the highest priority for pitch trim?
Captain then first officer then autopilot
The Stall Protection System is active when?
Calibrated airspeed is less than 215 kts
Altitude is more than 200 feet AGL
Stick Pusher SHUT OFF switch light is not selected OFF
How many pounds of force is needed to override the stick pusher?
80 lbs of force
T/F: The stall warning angle of attack limit is set to a lower value when ice is adhering to the aircraft.
TRUE
Assuming REF SPEEDS is set to INCR
T/F: Maximum rudder travel is based on flap selection.
TRUE
The RUD1 or 2 PUSH OFF switch lights _____.
depressurization the associated rudder PCU
Roll control is provided by 2 ailerons and a total of _____ flight spoilers.
4
What does the SPOILERS switch on the glare shield accomplish?
Controls spoiler mode (FLIGHT or TAXI)
In the event of a roll control jam:
Autopilot Disengage
If control still jammed:
ROLL DISC Handle pull and turn 90 degrees
Control wheels both pilots attempt roll control
Aircraft control pilot with free controls flies
Call for Roll Control Jam Checklist
Which flight controls are not hydraulically operated?
Ailerons
The ELEVATOR PRESS caution light illuminates when what occurs?
All 3 PCUs are operating
T/F: The pitch feel and trim unit provides tactile feedback to simulate control loads and avoid over control of the elevator.
TRUE
T/F: Pitch trim rate is variable and based on flap configuration.
FALSE, based on airspeed not flaps
The FLAP POWER caution light illuminates to indicate _____.
General System Failure
Flaps are unsafe for use and locked in the last valid position
T/F: If the stick shaker activates, the autopilot will remain engaged and revert to TOGA mode.
FALSE, autopilot will disengage and will not revert to TOGA mode
