Flight Controls Flashcards
What are the primary flight controls on the E175
Ailerons
Multi Function Roll Spoilers
Elevators
Rudder
What are the secondary flight controls on the E175
Flaps Slats Horizontal stabilizer Multi function spoilers when used as speed brakes or ground spoilers Ground spoilers
What actuates and moves the respective flight controls?
Power Control Units (PCUs)
What flight controls are actuated by conventional control cables?
Ailerons
What flight controls use fly-by-wire technology?
Everything except the ailerons
How many ACE units are installed and where are they located? (Actuator Control Electronics)
9
2 Primary ACEs in the FWD Avionics Bay
1 Spoiler ACE in the FWD Avionics Bay
2 Slat/Flap ACEs in the MID Electronics Bay
2 Spoiler ACEs in the MID Electronics Bay
1 Primary ACE in the AFT Electronics Bay
1 H-Stab ACE in the AFT Electronics Bay
What is the PBIT and what is its purpose?
Power up Built In Test. It ensures that the flight control system components remain capable of executing their functions
The electrical PBIT is automatically performed after:
Aircraft has been powered by any AC source and it takes approximately 3 minutes to complete
The electrical PBIT is interrupted if: (3)
AC electrical power is removed
The electrical hydraulic switches are turned off
The hydraulic switches are turned on
What does FLT CTRL BIT EXPIRED on EICAS mean?
It has been 50 hours since the last PBIT test. It will remain there until the new test is completed. This will not show up in flight
(T/F) The hydraulic system the powers the elevators changes daily as the PCUs change.
True
When the system goes from normal mode to direct mode, which flight control system is bypassed?
The FCM (flight control module)
(T/F) The thrust lever changes can automatically cause a change to the elevator without pilot input
True. Through the FMC (flight control module). This is limited to +/- 5 deg.
ELEV THR COMP FAIL on EICAS means what?
Elevator thrust compensation failed. Means the elevator will not move automatically as thrust is changed
Stall warning is provided by the ____
Auto Flight Control System (AFCS)
(T/F) When the stick shaker is activated the control wheel is then limited to keep the aircraft below a specified AOA, thus preventing a stall.
True
AOA LIMIT FAIL on EICAS means what?
The aircraft will not stop the pilot from exceeding any specified AOA. Thus allowing the aircraft to stall
What is the difference between a failed PCU and a jammed control surface when it comes to the elevator?
If a PCU fails, the other PCU for that control surface will continue to move the surface.
If a control surface is jammed that elevator will then be controlled by the other sides elevator and that one will remain in a fixed position
Manual pilot trim commands are limited to ___ seconds
3 seconds
What actuates the H-stab?
2 DC acutator motors. They can both fully supply the system if one fails
The HS-ACE responds to all trim commands with the following priority?
Backup trim command
Pilot trim command
Copilot trim command
FCM trim command
(T/F) The H-stab pitches the aircraft down in a stick shaker situation?
False. It limits movement up, but does not pitch the aircraft down
What ways can the pilots disconnect the pitch trim system?
Push and hold the autopilot disconnect. The system is deactivated as long as the button is held
Push both of the guarded system disconnect buttons below the backup pitch trim
PITCH TRIM SYS X FAIL on EICAS means what?
The respective trim switch on the yoke is failed
Pushing one trim switch on the yoke for ___ seconds will deactivate the switch
7 seconds
The roll trim rocker switch is limited to inputs of ___ seconds
3 seconds
There are ___ roll spoilers per wing and ___ ailerons per wing
3 spoilers and one aileron per wing
If an aileron jam happens on the pilot side, who retains control of the system?
If an aileron jam happens on the F/o side, who retains control of the system?
F/o
Captain
The inboard ailerons PCUs are connected to hydraulic system ___
The outboard ailerons PCUs are connected to hydraulic system ___
Inboard are on system 2
Outboard are on system 3
The multi function spoiler are numbered ___ ___ ___ for the left wind and ___ ___ ___ for the right wing
L5 L4 L3 Fuselage R3 R4 R5
The inboard and middle PCUs for the multi function spoilers are powered by hydraulic system ___
The outboard panel PCUs for the multi function spoilers are powered by hydraulic system ___
Inboard and middle are on system 1
Outboard are on system 2
(T/F) If one spoiler switches to direct mode, all spoilers will then switch to direct mode
False. They won’t necessarily
The spoilers are limited to ___ deg inflight
30 deg.
The speed brake will retract automatically upon selection of flap ___ or upon thrust lever selection >___deg.
Flap 2
TLA > 70 deg
SPDBRK LEVER DISAG in ___ on the EICAS means what?
Blue. The speed brakes were automatically retracted due to flap setting or thrust lever setting and the lever wasn’t brought to closed
The speed brake will automatically retract if IAS becomes lower than ____ KIAS.
180 KIAS
The ground spoilers are labeled ___ ___ for the left side and ___ ___ for the right side
L2 L1 Fuselage R1 R2
The outboard ground spoilers are supplied by hydraulic system ____
The inboard ground spoilers are supplied by hydraulic system ____
Outboard are system 1
Inboard are system 2
(T/F) The ground spoilers are either fully deployed or fully stowed.
True
The ground spoilers fully deploy to an angle of ___ deg.
60 deg.
If the ground spoilers are at an angle of > ____ deg. a warning will appear.
6 deg. Indicated the ground spoilers are not stowed fully
GROUND SPOILERS FAIL in ___ on EICAS means what?
Red. The ground spoilers didn’t stow fully and you are not configured for takeoff
What condiditons must be met in order for the ground spoilers to deploy? (3)
Weight on Wheels
TLA below 26 deg.
Wheel speed input above 45 kts or airspeed above 60 kts
The ground spoilers will automatically retract when:
Wheel speed is below 45 kt for at least 5 seconds
If the thrust levers are moved beyond ___ deg. TLA on landing the spoilers will automatically retract
35 deg. TLA
The upper rudder PCU is powered by hydraulic system ___
The lower rudder PCU is powered by hydraulic system ___
Upper is system 1
Lower is system 3
Full rudder pedal input will provide a maximum of ___ deg. deflection of the rudder
30 deg.
What will happen to the rudder if the pilots rudder pedals become jammed?
The FCM will still command rudder inputs through the P-ACE. It will still provide yaw damping and turn coordination
What happens if the PCUs jam?
The rudder will be locked in that set position. The pilot will have sufficient control of the aircraft with the ailerons and roll spoilers
There are __ slats on the aircraft with ___ per wing
8 on the plane with 4 per wing
There are ___ flaps per wing and they are ____ type flap
2 double slotted flaps per wing
There are ___ slat/flap control lever positions
7
____ extend first and ____ retract first
slats extend first and flaps retract first
What is unique about flap position 4 and position 5?
They’re they same slat/flap positions just that 4 is used for takeoff while 5 is used for landing
FLAP FAIL in ___ on EICAS means what?
Amber. Means that there wasn’t a symmetrical deployment of the flaps. This could also mean a dual channel failure and they system will no longer be available
SLAT FAIL in ___ on EICAS means what?
Amber. Means that a slat was skewed due to a slat actuator failure. This could also mean a dual channel failure and they system will no longer be available
SLAT/FLAP LO RATE in ___ on EICAS means what?
Blue. Means that an ACE Flap or Slat channel 1 or 2 has failed, or the flap/slat PDU has failed and the slats/flaps will operate at a slower speed
How does the RAT being deployed affect the flaps/slats?
They will operate at half speed. Flaps will also be limited to position 3
Maximum slat deflection is ___ deg.
Maximum flap deflection is ___ deg.
Slats are 25 deg.
Flaps are 35 deg.
The slats display box options are:
0, 3, Full
The flaps display box options are:
0, 1, 2, 4, Full
