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Envoy E175 > Flight Controls > Flashcards

Flight Controls Flashcards

1
Q

What are the primary flight controls on the E175

A

Ailerons
Multi Function Roll Spoilers
Elevators
Rudder

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2
Q

What are the secondary flight controls on the E175

A 
Flaps
Slats
Horizontal stabilizer
Multi function spoilers when used as speed brakes or ground spoilers
Ground spoilers
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3
Q

What actuates and moves the respective flight controls?

A

Power Control Units (PCUs)

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4
Q

What flight controls are actuated by conventional control cables?

A

Ailerons

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5
Q

What flight controls use fly-by-wire technology?

A

Everything except the ailerons

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6
Q

How many ACE units are installed and where are they located? (Actuator Control Electronics)

A

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

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7
Q

What is the PBIT and what is its purpose?

A

Power up Built In Test. It ensures that the flight control system components remain capable of executing their functions

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8
Q

The electrical PBIT is automatically performed after:

A

Aircraft has been powered by any AC source and it takes approximately 3 minutes to complete

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9
Q

The electrical PBIT is interrupted if: (3)

A

AC electrical power is removed
The electrical hydraulic switches are turned off
The hydraulic switches are turned on

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10
Q

What does FLT CTRL BIT EXPIRED on EICAS mean?

A

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

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11
Q

(T/F) The hydraulic system the powers the elevators changes daily as the PCUs change.

A

True

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12
Q

When the system goes from normal mode to direct mode, which flight control system is bypassed?

A

The FCM (flight control module)

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13
Q

(T/F) The thrust lever changes can automatically cause a change to the elevator without pilot input

A

True. Through the FMC (flight control module). This is limited to +/- 5 deg.

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14
Q

ELEV THR COMP FAIL on EICAS means what?

A

Elevator thrust compensation failed. Means the elevator will not move automatically as thrust is changed

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15
Q

Stall warning is provided by the ____

A

Auto Flight Control System (AFCS)

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16
Q

(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.

A

True

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17
Q

AOA LIMIT FAIL on EICAS means what?

A

The aircraft will not stop the pilot from exceeding any specified AOA. Thus allowing the aircraft to stall

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18
Q

What is the difference between a failed PCU and a jammed control surface when it comes to the elevator?

A

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

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19
Q

Manual pilot trim commands are limited to ___ seconds

A

3 seconds

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20
Q

What actuates the H-stab?

A

2 DC acutator motors. They can both fully supply the system if one fails

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21
Q

The HS-ACE responds to all trim commands with the following priority?

A

Backup trim command
Pilot trim command
Copilot trim command
FCM trim command

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22
Q

(T/F) The H-stab pitches the aircraft down in a stick shaker situation?

A

False. It limits movement up, but does not pitch the aircraft down

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23
Q

What ways can the pilots disconnect the pitch trim system?

A

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

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24
Q

PITCH TRIM SYS X FAIL on EICAS means what?

A

The respective trim switch on the yoke is failed

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25
Q

Pushing one trim switch on the yoke for ___ seconds will deactivate the switch

A

7 seconds

26
Q

The roll trim rocker switch is limited to inputs of ___ seconds

A

3 seconds

27
Q

There are ___ roll spoilers per wing and ___ ailerons per wing

A

3 spoilers and one aileron per wing

28
Q

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?

A

F/o

Captain

29
Q

The inboard ailerons PCUs are connected to hydraulic system ___
The outboard ailerons PCUs are connected to hydraulic system ___

A

Inboard are on system 2

Outboard are on system 3

30
Q

The multi function spoiler are numbered ___ ___ ___ for the left wind and ___ ___ ___ for the right wing

A

L5 L4 L3 Fuselage R3 R4 R5

31
Q

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 ___

A

Inboard and middle are on system 1

Outboard are on system 2

32
Q

(T/F) If one spoiler switches to direct mode, all spoilers will then switch to direct mode

A

False. They won’t necessarily

33
Q

The spoilers are limited to ___ deg inflight

A

30 deg.

34
Q

The speed brake will retract automatically upon selection of flap ___ or upon thrust lever selection >___deg.

A

Flap 2

TLA > 70 deg

35
Q

SPDBRK LEVER DISAG in ___ on the EICAS means what?

A

Blue. The speed brakes were automatically retracted due to flap setting or thrust lever setting and the lever wasn’t brought to closed

36
Q

The speed brake will automatically retract if IAS becomes lower than ____ KIAS.

A

180 KIAS

37
Q

The ground spoilers are labeled ___ ___ for the left side and ___ ___ for the right side

A

L2 L1 Fuselage R1 R2

38
Q

The outboard ground spoilers are supplied by hydraulic system ____
The inboard ground spoilers are supplied by hydraulic system ____

A

Outboard are system 1

Inboard are system 2

39
Q

(T/F) The ground spoilers are either fully deployed or fully stowed.

A

True

40
Q

The ground spoilers fully deploy to an angle of ___ deg.

A

60 deg.

41
Q

If the ground spoilers are at an angle of > ____ deg. a warning will appear.

A

6 deg. Indicated the ground spoilers are not stowed fully

42
Q

GROUND SPOILERS FAIL in ___ on EICAS means what?

A

Red. The ground spoilers didn’t stow fully and you are not configured for takeoff

43
Q

What condiditons must be met in order for the ground spoilers to deploy? (3)

A

Weight on Wheels
TLA below 26 deg.
Wheel speed input above 45 kts or airspeed above 60 kts

44
Q

The ground spoilers will automatically retract when:

A

Wheel speed is below 45 kt for at least 5 seconds

45
Q

If the thrust levers are moved beyond ___ deg. TLA on landing the spoilers will automatically retract

A

35 deg. TLA

46
Q

The upper rudder PCU is powered by hydraulic system ___

The lower rudder PCU is powered by hydraulic system ___

A

Upper is system 1

Lower is system 3

47
Q

Full rudder pedal input will provide a maximum of ___ deg. deflection of the rudder

A

30 deg.

48
Q

What will happen to the rudder if the pilots rudder pedals become jammed?

A

The FCM will still command rudder inputs through the P-ACE. It will still provide yaw damping and turn coordination

49
Q

What happens if the PCUs jam?

A

The rudder will be locked in that set position. The pilot will have sufficient control of the aircraft with the ailerons and roll spoilers

50
Q

There are __ slats on the aircraft with ___ per wing

A

8 on the plane with 4 per wing

51
Q

There are ___ flaps per wing and they are ____ type flap

A

2 double slotted flaps per wing

52
Q

There are ___ slat/flap control lever positions

A

7

53
Q

____ extend first and ____ retract first

A

slats extend first and flaps retract first

54
Q

What is unique about flap position 4 and position 5?

A

They’re they same slat/flap positions just that 4 is used for takeoff while 5 is used for landing

55
Q

FLAP FAIL in ___ on EICAS means what?

A

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

56
Q

SLAT FAIL in ___ on EICAS means what?

A

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

57
Q

SLAT/FLAP LO RATE in ___ on EICAS means what?

A

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

58
Q

How does the RAT being deployed affect the flaps/slats?

A

They will operate at half speed. Flaps will also be limited to position 3

59
Q

Maximum slat deflection is ___ deg.

Maximum flap deflection is ___ deg.

A

Slats are 25 deg.

Flaps are 35 deg.

60
Q

The slats display box options are:

A

0, 3, Full

61
Q

The flaps display box options are:

A

0, 1, 2, 4, Full

Envoy E175 (22 decks)

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