SH Chapter 4 - Automatic Flight Flashcards
1) What is the function of the Flight Control Unit?
Short term interface between crew and FMGC
2) What do dashes in the FCU display windows along with the adjacent white dot indicate?
In managed guidance
3) How is Selected Guidance engaged?
Pulling the knob out and dialing the selected parameter
4) Does Selected or Managed Guidance have priority?
Selected
5) Will the FCU Altitude window ever display dashes?
No
6) What are the main components of the FMGS?
- 2 FMGU
- 2 MCDU
- 1 FCU
- 2 Flight Augmentation Computers (FACs)
7) What are the functions of the Flight Management Guidance Computers?
Flight Management - Navigation and management of Nav radios - Management of Flight Planning - Prediction & optimization of performance - Display management Flight Guidance - AP Command - FD Command - A/THR Command
8) What are the 4 modes of FMGS operation?
- Dual mode (normal mode)
- Independent mode (each FMGC controlled by its MCDU)
- Single mode (one FMGC only)
- Backup navigation mode
9) How does autopilot selection influence master FMGS logic?
- One AP engaged, the related FMGC is master
- Two APs engaged, FMGC 1 is master
- No AP engaged, FD1 on, FMGC 1 is master. FD2 on and FD1 off, FMGC 2 is master
10) If an amber SELECT OFFSIDE RNG/MODE message is displayed on the ND, what action should the crew take?
Change the scale or mode on EFIS to match the other side ND
11) What is the difference between the large and small fonts utilized in the MCDU?
Large are crew entry and modifiable data. Small is defaulted/computed and non modifiable data
12) What do amber box prompts on the MCDU indicate?
Mandatory data
13) What is VLS?
Lowest selectable speed
14) What are the 2 modes of flight guidance?
Managed and selected
15) What is the Managed mode of flight guidance used for?
Commanding long term lateral, vertical and speed profiles via MCDU
16) What is the Selected mode of flight guidance used for?
Commanding short term lateral, vertical and speed profiles via MCDU
17) Can both autopilots be engaged during any phase of flight?
Only when the localizer/glide slope, rollout or go around mode is armed or engaged
18) What is Ground Speed Mini?
Speed target that accounts for gusts or wind changes (magenta speed bug)
19) What does it mean when you see the magenta target airspeed triangle above VAPP on approach?
Ground speed mini has computed headwind is higher than entered in MCDU
20) Is the Ground Speed Mini function available in selected speed?
No
21) What are 3 ways to disconnect the A/THR?
- Thrust levers to idle
- Instinctive button
- A/THR pb on FCU
22) How do you disconnect the A/THR for the remainder of the flight?
Pushing and holding instinctive button for at least 15 seconds
23) What would you lose if you held down the Instinctive Disconnect Pushbutton for more than 15 seconds?
A/THR for remainder of flight
24) What happens to thrust and what annunciates on the FMA when you reach Alpha Floor?
Thrust gots to TOGA and A FLOOR displayed in green surrounded by flashing amber box
25) What occurs during Alpha Floor protection after speed increases above VLS?
TOGA LK
26) How do you regain normal A/THR when in TOGA LK?
Disengage A/THR and reengage with A/THR pb
27) When is Alpha Floor Protection active?
In normal law, from lift off to 100’ AGL on landing
28) When would Thrust Lock occur?
When levers in CL (MCT with OEI) and the
A/THR pb is pushed, or A/THR disconnects due to failure
29) How do you confirm all autopilot, FD, and A/THR inputs?
FMA
30) What does each column mean on the FMA portion?
From left to right, A/THR operation, AP/FD vertical modes, AP/FD lateral modes, approach capabilities, AP/FD & A/THR engagement status
31) How is the crew made aware of mode changes on the FMA?
White box displayed for 10 seconds around any mode change
32) How are armed/engaged modes displayed on the FMA?
Engaged is in green and armed in blue or magenta
33) Under Normal Law, what do the FACs provide?
Four main functions:
Yaw- Damping, turn coordination, rudder trim & rudder travel limitation
Flight Envelope - PFD speed scale management & alpha floor protection
Low-energy Aural Alert - “Speed, speed, speed”
Windshear detection - Aural and visual
34) How do you determine the validity of the navigation database?
Status page of MCDC under Data
35) What input does each FMGC use for position determination?
Each FMGC from a mix IRS position & GPS position or computed radio position
36) When would a Takeoff Shift be entered on the PERF TO page?
When taking off from an intersection. Entered in PERF Take Off page
37) Where do you enter the Zero Fuel Weight?
Init B
38) What occurs when managed NAV mode is engaged and the aircraft overflies a flight plan discontinuity?
NAV mode automatically reverts to HDG (TRK) mode
