Flashcards in Flight Controls Deck (98):
What is the function of the spoilers?
To assist the ailerons in providing roll control
also operate as speedbrakes
What assists the elevators in providing pitch control?
A variable pitch horizontal stabilizer
What are the high lift devices for takeoff and landing?
Trailing edge flaps
leading edge slats
The primary flight control positions may be viewed where?
on the lower EICAS display when the STATUS mode is selected
How are the flight controls powered?
What alternate way can the flaps and slats be operated?
Electrically by using the alternate flaps and slats drive system.
Is there manual reversion on this airplane?
How many FLT CONTROL SHUTOFF switches are there and where are they located?
6 on the accessory panel
How should the FLT CONTROL SHUTOFF switches be used and configured?
Use should only be done by maintenance and they are left ON for all flight operation.
What do the FLT CONTROL SHUTOFF switches control?
Hydraulic power to the tail and wing flight controls
FLT CONT VALS amber advisory msg means?
Two or more FLT CONTROL SHUTOFF valves are closed (off)
What provides flight control power incase of a dual engine failure?
RAT - Ram Air Turbine
Which hydraulic system is the RAT apart of?
Center hydraulic system
What are the indications that the RAT has deployed?
RAT UNLOCKED amber advisory msg
UNLKD switch light illuminates
What is the meaning of the green PRESS light on the RAT switch?
Adequate hydraulic power is provided for normal flight control operations.
What is the minimum speed the RAT needs to provide hydraulic power?
Which hydraulic system powers the elevators?
Left, center, and right
If one control column jams, how can the jam be overided?
By applying force to the other column. Pitch control is then available using the free control column path.
How is pitch trim provided?
By varying the horizontal stabilizers angle
What can you use to set stabilizer trim?
Electric trim switches or alternate trim switches.
When will the white indicator band disappear on the stabilizer position indicators?
if there is a malfunction in the stabilizer position indicator other than a loss of power.
How many trim control modules position the stabilizer?
What do the stabilizer trim control modules use to set stabilizer trim?
Hydraulic power trim motors and brakes.
Trim rate varies with..........
Airspeed. As airspeed increases, trim rate decreases.
Which hydraulic systems are used to power the hydraulic stabilizer brakes and motors to trim the stabilizer?
Left and center
How many trim control modules does the auto pilot use and how does it compare from the normal rate?
1 and it trims at 1/2 the normal rate.
Which trim control module does the center A/P use?
Normally, left. It uses the right module if the left fails.
What happens when using the trim switches when a single A/P is in use?
The A/P disconnects.
What happens to the electric trim switches during autoland or go-around?
The electric trim switches are inhibited.
What can inhibit autopilot and electric trim switch signals to the stabilizer?
Any control column input opposing the direction of the stabilizer trim.
What happens to the stabilizer trim when the left and center hydraulics are lost in flight?
The Pitch Enhancement System, or PES, is automatically activated when the control column trim switches are used.
How does the PES(Pitch Enhancement System) work?
A hydraulic motor powered by the right hydraulic systems drives a pump which uses trapped left hydraulic system fluid to operate the stabilizer.
What is the trim rate of PES?
1/4 of the normal rate.
How is the PES activated?
Only by the control column trim switches.
What are the 3 EICAS msgs. related to pitch control non-normal?
UNSCHD STAB TRIM (AMBER)
STAB TRIM (AMBER)
When will the RED WARNING switch, the RED STABILIZER msg, and the RED CONFIG light appear?
When the STABILIZER is not in the green band range for takeoff.
When will a UNSCHD STAB TRIM msg and caution light appear?
When the stabilizer moves without a trim signal or stabilizer movement is opposite of the direction signaled.
What does the STAB TRIM advisory msg mean and when will it appear?
Indicates a stabilizer trim fault exists and will appear when a brake fails to release or a motor fails.
What is the purpose of the STAB TRIM switches?
Controls hydraulic power for stabilizer trim. Control hydraulic SOV's
What does a STAB TRIM switch do when it is move to CUT OUT?
Closes a hydraulic SOV and prevents the hydraulic power from releasing the brake and operating the motor.
Which hydraulic systems power the rudder?
Left, Center, and Right hydraulic systems
What is controlled by the ruder pedals?
Three hydraulic actuators which move the rudder.
If one or two hydraulic systems are lost, will rudder control still be available?
Yes, but rudder displacement will be limited.
What is the purpose of the Rudder Ratio Changer?
It varies rudder displacement base on airspeed to protect the structural integrity. The lower the speed the more displacement. The higher the speed the less the rudder will be displaced.
What powers the Rudder Ratio Changer and actuator?
Left hydraulic system.
When will the RUDDER RATIO msg appear?
When there is a fault with the rudder ratio changer or loss of left hydraulic system pressure.
What happens to the left hydraulic system rudder actuator with a rudder ratio changer fault?
The left hydraulic system actuator automatically depressurizes to provide structural protection for the rudder.
What are the limitations with a RUDDER RATIO msg?
15 knot crosswind limit
Above 160 knots, avoid abrupt pedal input.
What powers the Yaw Damper Systems?
Left and Center Hydraulic Systems
What gives flight information to the Yaw Damper Controllers?
The IRS system
How does a loss of one Yaw damper affect the Dampening authority?
1/2 of Yaw Dampening Authority is available.
What provides roll control?
Hydraulically powered ailerons and spoilers.
Which hydraulic systems power the ailerons?
Left, Center, and Right.
How many actuators move each aileron?
What will cause the inboard ailerons to droop?
Selecting flaps to 20.
What flight controls assist the ailerons in roll control?
Six spoilers on each wing.
How many actuators operate a spoiler panel?
Each spoiler uses power from one of the 3 hydraulic systems.
What prevents over controlling at cruise speed or high speeds?
Two spoilers on each wing are inhibited from responding to control wheel commands.
At high speeds an automatic aileron lockout system prevents operation of the outboard ailerons.
What is the procedure if one control wheel becomes jammed?
Apply additional force to both wheels and it will disconnect the unjammed control wheel.
AILERON LOCKOUT at cruise speed means?
One or more ailerons may not be in the locked position.
AILERON LOCKOUT msg at approach speeds means?
One or both outboard ailerons failed to unlock.
Spoiler panels serve as.....?
Inflight and ground speedbrakes.
Inflight, what happens when the spoiler lever is moved to the up position?
All but two spoiler panels extend.
What should be done to avoid buffeting when using the speedbrakes?
Avoid use with flaps greater than 5.
What three conditions must be satisfied for Auto-Extension of the spoilers after landing?
Thrust levers idle
Hydraulic pressure to gear tilt actuators
Sensors detect airplane on the ground
When will the spoiler panels automatically deploy with the spoiler handle in the down position?
When the three conditions are met and reverse thrust is applied on either engine.
What are the two actions that will move the speedbrakes to the down position after landing?
Thrust levers out of idle
Or when the airplane senses a bounce it will move the spoilers to the armed position.
What does the SPOILERS warning msg and lights indicate?
The spoilers are not in the down position for takeoff.
SPEEDBRAKES EXT msg, caution light, and oral signal mean?
The speedbrake lever is moved passed the arm position:
1.) Below 800ft RA
2.) Flaps in landing configuration
One or more spoiler pairs have failed to operate as signaled.
What capabilities are reduced with a SPOILER fault?
Reduced roll and speed control
Reduced capability of the auto speedbrake system
AUTO SPEEDBRAKE msg
Indicates a fault in the automatic speedbrake system
In FLT: if speedbrake lever is in the ARMED position, may cause inadvertent speedbrake extension.
On GND: may result in the loss of automatic speedbrake extension.
What type of power is used in normal operation of the flaps and slats?
What type of power is used in alternate operation of the flaps and slats?
What happens when the Flap Lever is moved?
It send a signal to three Power Drive Units which move the flaps and slats to the selected position.
Which hydraulic system provides power to the Power Drive Units?
Center hydraulic system
What does each Power Drive Unit operate?
PDU 1.) Inboard Slats (mechanically linked)
PDU 2.) Outboard Slats (10)
PDU 3.) Trailing Edge Flaps
Which flap positions do the Inboard Ailerons droop?
5,15, and 20
Slat indication is only indicated in which flap position?
The flap maneuvering speeds allow for how much bank before buffet?
The speeds allow for twenty five degrees angle of bank with a fifteen degree overshoot before the onset of buffet.
Flaps 0 Maneuvering Speed
VREF30 + 8OKTS
Flaps 1 Maneuvering Speeds
Flaps 5 Maneuvering Speeds
Flaps 15, 20 Maneuvering Speeds
Flaps 25 Maneuvering Speeds
Flaps 30 Maneuvering Speed
Do not extend flaps or slats above what altitude?
Flap Load Relief system is armed when you select which flap positions?
25 or 30
When does the Flap Load Relief System activate and what happens?
The Flap Load Relief System activates when the flaps speed limit for flaps 25 or 30 is exceeded. It automatically retracts the flaps to position 20, or prevents flap extension to position 25 or 30.
Using the alternate flaps system, how long does it take to go from flaps "up" to "20"?
What happens when the ALTN FLAPS LE & TE switches are pressed?
The LE and TE hydraulic SOV's close and the electric motors are armed to provide power to their corresponding Power Drive Units.
What precaution must you be aware of when using Alternate Flap System?
There is no Flaps Protection System available, so airspeed must be monitored not to exceed flap speed limits.
The FLAPS warning msg combined with the WARNING and CONFIG lights indicate?
The flaps are not in the correct position for take-off.
TE FLAP DISAGREE or LE SLAT DISAGREE msg combined with lights and CAUTION
Flaps or slats are not in or driving towards their commanded position.
Also, TE FLAP DISAGREE when the FLAP lever is out of any detent for any extended time.
TE FLAP ASYM or LE SLAT AYSM msg and CAUTION
A TE flaps LE SLAT does not agree with its symmetrical pair. The TE Flaps or LE SLATs PDU automatically depressurizes.
FLAP LD RELIEF msg and CAUTION
Indicates the flaps did not retract to 20 when the flap speed for 25 or 30 was exceeded.
What are the primary flight controls?
ailerons, elevators and rudder