Flight Controls Flashcards
What is the Stabilizer Trim priority logic?
- Back Up
- Captain
- FO
- FCM (auto-trim) commands.
In DIRECT mode for the flight controls the Flight Control Module is bypassed and what do you loose?
High level functions are by passed
- AOA Limiting - Prevents a Stall
- Thrust Compensation - Prevent pitch moment with thrust change.
- More stable when using speed brakes
- Less elevator deflection at higher airspeeds.
An Amber indications for the flaps means what?
The surface has failed.
If trim is not set for takeoff, when do you find out its not set properly?
When you press the Takeoff Config Check, you get a “NO TAKEOFF TRIM” will be announced
In DIRECT Mode will the ground spoilers deploy on landing?
No, not even if you pull the handle.
What does the SHAKER 1 CUTOUT button due?
It activate the stick shaker when pitching to the PLI
All flight controls are Fly-By-Wire, exept
The Ailerons
TRIM Commands are limited to how many seconds before you get the Aural warning?
3 seconds
The speed brakes automatically retract under what conditions?
- Airspeed less than 180kts
- TLA 70 degrees
- Flaps 2 or greater.
On the Yoke the Red AP/TRIM DISC button does what
When pressed and held it disables both Pitch Trim Channels
What makes up the flight control system
Primary and Secondary flight controls
What are primary Flight Controls?
- Ailerons
- Elevator
- Rudder
What makes up secondary flight controls?
- Horizontal Stabilizer
- Spoilers
- Flaps and Slats
How to the Ailerons Work?
Conventional cables to a pair of hydro-mechanical actuators
Which Trim Switch has priority?
The captain side.
How is Roll Controlled?
With ailerons and 3 MFS
How many multi function spoilers are their and what are their function?
- 3 Are to aid with roll in the air
- 2 are ground only spoilers
- 5 total
Will a loss in airspeed cause the flight controls to go in Direct Mode?
Yes
How are the flight controls trimed?
The Ailerons, Rudder and horizontal Stabilizers move to a new position?
Will the MFS work in Direct Mode?
Yes, only in the air.
What happens to the flight control system when the RAT is the only AC power source?
- Horizontal stab trim operates at 1⁄2 speed
- Slat / flap system operates at 1⁄2 speed
- Slat / flap position is limited to ‘3’ to allow adequate airspeed for the RAT
What does the TCS Button do?
if the AP is engaged, pressing and holding the TCS will momentarily override the AP. Releasing the TCS, the AP resumes airplane control.
What is the E-PBIT testing for?
Looking for out of tolerance conditions and failures.
What is the H-PBIT testing for?
Testing to see if the actuators can actually move the flight controls.
At what temperature will the H-PBIT test to run unless expired?
Below 10 degrees.
What is Fly By Wire?
No mechanical connection between flight controls and cockpit controls.
A signal is sent to a computer that tells the flight controls to move no physical connection.
The Actuator Control Electronics talks to what 2 things?
- FCM - Flight Control Module
2. Hydraulic actuators that move flight controls
What actually moves the flight controls after all the electronic signals?
PCU -> Hydraulic Actuators.
What is the difference between Normal and Direct Mode?
Normal - ACE -> FCM -> ACE -> PCU
Direct - FCM is taken out of the Loop and the ACE talks directly to PCUs
Explain the Flight Control Sequence and the computer talks to each other what you make a yoke or rudder input?
- A signal is sent to the proper ACE
- ACE talks to FCM
- FCM determines how much is needed and send that signal back to ACE.
- ACE talks to PCU and send the signal that it received from FCM.
Explain Hight Level Function
- ELEVATOR CONTROL VS. AIRSPEED -
Its determining how much we need to move elevator based on airspeed speed. The faster we go the less elevator is needed.
Explain Hight Level Function
- AUTO THRUST COMPENSATION -
Increasing or decreasing thrust causes pitch changes. The FCM helps with these pitch changes
Explain Hight Level Function
- AOA LIMITER -
IF we get into a stall condition this will limit how much you can keep pitching up, to further increase the star.
Explain Hight Level Function
- YAW DAMPER -
If we loose NORMAL MODE we will loose Yaw Damper
Explain Hight Level Function
- CONFIGURATION CHANGE COMPENSATION -
As you add speed brakes, it compensates from the pitch down.
A flaps 2 takeoff in how many degrees of flaps?
10 Degrees
A flaps 4 takeoff in how many degrees of flaps?
20 degrees
A flaps full takeoff in how many degrees of flaps?
35 degrees
Explain Spoilers?
They are electrically controlled and Hydraulic actuated by the S-ACE
How do the spoilers help you stop the aircraft?
Increase the effective weight on the brakes.
The Ground Spoilers how many and when do they pop up?
2 inboard spoilers per side and the pop up on rejected takeoff and landing
what is the trip priority
- BackUp
- CAP
- FO
- FCM -> Auto
What happens if one side of the trim is held for 7 seconds.
It hard mechanically disconnects the trim from the system. Only MX can re-connect it.
How does the Jam Control Pull disconnect Handles work?
- You get a jammed control Aileron or Elevator.
- You pull one of the handles
- The good side takes over and starts flying the airplane.
- The bad side yoke gets stuck but will not move his side of the flight controls.
- The good side Will only move his side of the controls not all the controls only their side.
- Airplane will be sluggish because you only have half the controls.
If you hold in the Auto Pilot DISC button what happens
It over rides the pitch trim
