Autoflight Flashcards
What is guidance panel used for?
Selects modes and functions for:
- lateral guidance
- vertical guidance
- AFCS guidance
What is the purpose of the bank button?
Limits bank angle to 17 degrees when in HDG mode
What does pressing the alt sel controller do?
Displays the altitude on the PFD in metres
What does the SRC button do?
Alternates between the left and right hand FMA modes as source for the autopilot
What does the TCS button do to the FD?
Syncs the flight director with current aircraft attitude
What does the LIM FMA indicate?
That vertical speed and target speed are incompatible with the thrust rating available
How many autpilots are there?
1 (dual channel)
When do the autpilot channels switch?
After each landing
How is the autopilot normally disengaged?
Using the quick disconnect buttons on the control wheel
How is the autopilot non-normally disengaged?
- AP button on the guidance panel
- either manual pitch trim switch is actuated
- stick shaker is activated
- windshear escape guidance is activated
How is the autopilot abnormally disengaged?
- reversion of the fly by wire system to direct mode
- either aileron or elevator control system has been disconnected
- force on the control column
- internal monitor failure
When is the yaw damper automatically engaged?
After power up of either hydraulic system 1 or 3
What are the FMA colours and what do they indicate?
Magenta = FMS
Green = non FMS
White = armed
Amber = alert
Red = abnormal
What is only non pilot selectable lateral mode?
TRACK
What bank angle will ROLL mode hold?
Bank angle at 6 degrees or less = roll wings level
Bank angle between 6 and 35 degrees = holds present bank angle
Bank angle above 35 degrees = maintains bank angle at 35 degrees
When is roll mode activated?
- toga pressed on ground and speed is below 100kts
- no lateral mode selected but a vertical mode is selected
- deselecting an active lateral mode
- course to intercept on fms is activated
When is roll mode deactivated?
When another lateral mode becomes active
When does LNAV engage?
- lnav is armed and pass through 200ft
- above 200ft and nav button is pressed
What is the bank angle limit when in LOC mode?
35 degrees
When does the automatic transition from roll to track occur on takeoff?
- speed above 100kts
- bank angle is at 3 degrees or below for more than 10 seconds
When is TO mode activated?
When TOGA button is pressed on the ground
What speed does TO mode hold when AEO?
V2 + 10
What speed does TO mode hold when OEI?
Less than V2 = guides v2
V2 to V2 + 10 = holds present speed
Greater than V2 + 10 = guides v2 + 10
When is ASEL inhibited?
During windshear escape and within 400ft of selected altitude during a go around
What are the two ILS checkpoints?
1500ft RA = system starts trying to engage highest capability available
800ft RA = system freezes the highest capability available
At what height does the crab technique change to the side slip technique?
150ft RA
What is a fail passive system?
A system that in the event of a failure causes no significant deviation of flight path or attiude
What happens at 1500ft during an autoland?
- rudder pedal check performed
What happens between 1500ft and 800ft during an autoland?
- AUTOLAND 1 becomes active
- ALIGN and FLARE modes are armed
What happens at 800ft during an autoland?
Pitch up trim commanded
What happens at 150ft during an autoland?
- ALIGN engages
- RLOUT and RETD arm
What happens at 50ft during an autoland?
FLARE engages
What happens at 30ft during an autoland?
RETD engages
What happens at main gear touchdown during an autoland?
- RLOUT and DROT engage
- auto throttle disengages
During an autoland how long after touchdown does the AP disconnect?
5 seconds
What does the thrust management system consist of?
Autothrottle
Thrust rating system
TLA trim
When does the AT engage on the ground?
- no failures
- AT button pressed
- TLA above 50 degrees
When does the AT engage in flight?
- no failures
- AT button pressed
- at or above 400ft AGL
When is the AT automatically disengaged?
- after touchdown
- thrust levers beyond toga
- reverse thrust during RTO
When is HOLD mode engaged?
At or above 60kts during takeoff roll
When is RETD mode armed?
- rad alt valid
- AT engaged
- slat/flaps 5 or full
- rad alt below 150ft
What is the purpose of TLA trim?
Synchronises N1 when AT is disengaged
