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Advanced Instruments > Auto Flight > Flashcards

Flashcards in Auto Flight Deck (15):
1

Requirements for the auto land

R/y needs to be CAT 3/2 ILS
Crew need to be qualified
A/c needs to be able to do it
Airfield must have specific SOP in place
Must meet the operators requirements

2

A/c requirements for an auto land

2+ autopilots

2 radio alts

2 height above the ground indicators

3

A fail op system

3 a/p or 2 a/p + 1 monitoring a/p

4

Fail passive system

Only have 2 a/p available

A fail op can turn to a fail passive if one a/p fails and still use the auto land

Can’t auto-land with less than 2 autopilots

5

Indications on a fail op system

Land 3 - fail op system is working fine

Land 2 - fail op has turned into a fail passive with 2 a/p working the a/l

No auto-land - only have 1 a/p and thus can’t auto-land

6

“Single CH” indication

Indicates a fail passive a/c is carrying out an auto-land

7

Alert height - A/L

Height at which, if a fail occurred and you can’t see the r/y, you must GA

You can degrade to a higher DH e.g CAT1 and continue the aprch if you are visual with the r/y

8

CAT 1

Equip - ILS, MLS, PAR
Vertical ref - Barometric alt
DH - not below 200ft
RVR - not less than 550m

9

CAT 2 ILS

Equip - ILS, MLS
Vertical ref - Radio alt
DH - below 200 ft but not below 100ft
RVR - not less than 300m

10

CAT3A

Equip - ILS, MLS
Vertical ref - Radio alt
DH - lower than 100ft
RVR - not less than 200m

11

CAT3B

Equip - ILS, MLS
Vertical ref - Radio alt
DH - Lower than 50ft or no DH
RVR - less than 200m but not less than 75m

12

CAT3C

Equip - ILS, MLS
Vertical ref - Radio alt
DH - no DH limitations and provide guidance to and along the r/y and taxiways without reliance on external visual reference
RVR - n/a

13

Parallel actuator

Control stick moves with autopilot commands

Boeing

14

Series actuator

Control stick doesn’t move with a/p commands

Airbus

15

Benefits of the automatic trim system

Cancels the hinge moment on the elevator

Ease the load on the servo actuator

Restores the pilot with the correct trim if they decide to disconnect the a/p