Auto Flight Flashcards
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
A/c requirements for an auto land
2+ autopilots
2 radio alts
2 height above the ground indicators
A fail op system
3 a/p or 2 a/p + 1 monitoring a/p
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
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
“Single CH” indication
Indicates a fail passive a/c is carrying out an auto-land
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
CAT 1
Equip - ILS, MLS, PAR
Vertical ref - Barometric alt
DH - not below 200ft
RVR - not less than 550m
CAT 2 ILS
Equip - ILS, MLS
Vertical ref - Radio alt
DH - below 200 ft but not below 100ft
RVR - not less than 300m
CAT3A
Equip - ILS, MLS
Vertical ref - Radio alt
DH - lower than 100ft
RVR - not less than 200m
CAT3B
Equip - ILS, MLS
Vertical ref - Radio alt
DH - Lower than 50ft or no DH
RVR - less than 200m but not less than 75m
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
Parallel actuator
Control stick moves with autopilot commands
Boeing
Series actuator
Control stick doesn’t move with a/p commands
Airbus
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
