AFCS Flashcards
What height does AP constantly need to be monitored below?
Below 3000ft AGL
What does the AFCP miscompare MSG mean?
Difference in PFD modes detected between pilots
Where would you find; Active Vertical modes Armed vertical modes Active Lateral modes Armed vertical modes
Active Vertical modes: Top RH corner PFD
Armed vertical modes: below active mode
Active Lateral modes: Top LH corner PFD
Armed vertical modes: below active mode
Error Message Locations
SYS STATUS
Scratchpad
Equipment history pgs
What happens in the last 1000ft in the CLB with AP engaged?
- 900ft: “ALTITUDE AQUIRED” verbal
- Digital readout and bug flashes amber 2s.
- 250’ ALTC mode entered
- Digital readout and bug flashes amber 2s.
- At preselected ALT AP auto changes from ALTC to ALT (holding).
What is the caution around using Vs in the CLB?
No auto throttle, can stall.
At high speed operations, a/c will respond quickly to large movements of VS wheel, can result in personnel injury and structural damage
What does pressing the BIT button do in flight?
You cannot run a BIT on ACP in flight
What does the TOGA button do? When airborne
- Disconnects AP.
- Commands wings level.
- Pitch attitude targeting 1.2Vs.
- Sequences waypoints and transitions FMS from descent to climb.
- Changes waypoint sequencing from manual to auto after MAPt.
What does an amber FD1 mean?
AFCP 1 is now providing all FD guidance
Primary and Secondary ways to disconnect AP
Primary: - Press AP disconnect button Sec: Loss of AFCP power. Overriding trim. TOGA pressed. AFCP failure. Loss of ATT/HDG info.
How would you trim the A/C with AP engaged?
Disconnect applicable axis channel, trim a/c, re-engage axis channel
When is Yaw damp active?
Whenever the AP lateral channel is engaged
When in ALT mode and you change the Vs wheel, will it do anything?
No
What happens when you push HDG & CRSE buttons on the NCP
HDG: Will align HDG bug to present HDG
CRSE: Will cause the CDI bar to centre and the CRSE pointer to point to the navaid station
if the AP is engaged, what happens to both the AP and the FD when you turn the FD OFF
The FD and AP will remain on in the background
explain rumour vs truth
PFD is truth source, shows what is actually active
NCP is rumour source
What are the 3 ways to tell AP is engaged
Annunciator bar on ACP
AP annunciator on PFD, with arrows
Annunciator on NCP
Explain why PFD command selection is important whilst using AP
PFD CMD selects which pilot PFD is in command;
- AFCPS utilise the nav source selected by PFDs CMDs DCP
If you lost LH DC, can you use AP still?
Lose rudder, elevator and aileron servos
Lose AP control panel
AFCP Power Supplies
AFCP 1 PAVS DC bus
AFCP 2 CAVS DC bus
AFCP Locations
AFCP 1 LH under deck rack
AFCP 2 RH under deck rack
Two AFCP functions
Flight Director function
Autopilot function
