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Systems 3 > Autopilot > Flashcards

Autopilot Flashcards

1
Q

What is the main use of autopilot

A

To reduce pilots workload

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2
Q

How many axis can autopilot control, what are they

A
  1. Roll
  2. Pitch
  3. Yaw
  4. Collective
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3
Q

What are the 5 main components to an autopilot system

A
  • A control device
  • signal processor
  • servo to flight controls
  • control surfaces
  • sensors
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4
Q

Are aitopilots often stand alone systems?

A

No, generally part of a more complex auto flight control system (AFCS)

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5
Q

What are the main components of an AFCS

A
  • flight management
  • flight guidance
  • flight directors
  • auto pilot
  • auto thrust
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6
Q

What can a dependency on automation lead to

A

Loss of SA

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7
Q

What are the 2 main sub systems associated with the pc21 Auto flight control system

A
  • autopilot and flight director system (AFDS)

- TAD

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8
Q

What 2 axis does the AFDS control the aircraft in

A

Roll

Pitch

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9
Q

What powers the AFDS

A

Gen 1 bus

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10
Q

At what degrees of pitch and bank will the autopilot disconnect at

A

+- 22° pitch

+- 38° bank

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11
Q

How are the pitch and roll servos connected to their respective control surfaces

A

Control Cables

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12
Q

What allows the pilot to manually override servo in the event of mechanical jam

A

Mechanical slip clutch

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13
Q

What autopilot related switches are mounted on the control column

A

Pitch and roll trim switch
Tcs
Ap disconnect

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14
Q

Where is the rudder trim switch

A

Pcl

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15
Q

What is shown on hud when AP us engaged

A

Asterisk

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16
Q

What supplies the autopilot with power

A

Gen 1 bus

Batt bus

17
Q

Within the autopilot system, what does the batt bus supply

A

AP disconnect warning (AMU)

18
Q

What components input to the FGC

A 
IRS
Front PFD
ADC
SFD
Control column
RIOC 3
MCP
TRIM/AIL PWR SWITCH
Safety monitors
19
Q

Pressing the AP key on the MCP does what and what symbols appear on the PFD

A

It connects 2 basic modes (pitch and roll attitude hold)

And
Aircraft reference symbol chnages
Flight director que apprears (both attitude indicator PFD)

20
Q

What are all the ways to disconnect AP

A
  • Press AP key on MCP
  • AP disconnect switch on control column
  • Either trim switch is operated for more than 1 sec
  • TCS is on. Pitch exceeds +-50° or +-75° AOB
  • FGC monitors detect parameters which exceed servo rate limits
  • stall
  • TRIM/AIL PWR SWTICH OFF
21
Q

When HDG mode is activated, how is the target heading set?

A

Rotaty switch on PFD

22
Q

How can the pilot activate AP to hold current attitude

A

By selecting AP on MCP

23
Q

What does the ALT mode allow the pilot to do

A

Intercept and hold current altitude

24
Q

How would a pilot activate AP so the current airspeed is held

A

Pressing P/S (pitch/ speed) button

25
Q

What visual cue appears to show this has been activated

A

Cyan bug on PFD ASI at set speed

26
Q

When in VS (vertical speed) mode is there a safety feature to prevent a stall if PCL position is too low

A

No, aircraft will stall if there is inefficient power

27
Q

What visual cues are given to indicate VS mode is active

A

Cyan bug on VSI and digital readout just above guage

28
Q

What systems does the TCS switch pause

A

Pitch and roll

29
Q

For what duration

A

Until switch is released

30
Q

What are the normal operating limits of AP

A

+- 20° pitch

+- 30° AOB

31
Q

What is the min height for AP engagement

A

400ft

32
Q

What is the min allowed height for AP disconnect in precision approach in GS mode

A

200ft

33
Q

What is the minima conditions for AP operation in IFR conditions

A

CAT 1

34
Q

Whats the max glideslope angle for an ILS final, in GS mode

A

4°

35
Q

If a trim monitor detects a fault what happens

A

Amber “AP TRIM” on MFD
aural tone
Attn gtrs

36
Q

What happens if the pitch and roll servos are disconnected

A

Warning “AP DISCONNECT” flashing on MFD for 5 seconds

Systems 3 (9 decks)

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