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Water Waste

6 with optional 8

1. How many water tanks

283l (75gal)

2. What is the water tank capacity


3. What powers the automatic water filling

Tanks 3 and 4

4. Where are the tank level sensors


5. What kind of sensor are the level sensors

A temperature sensor integrated with level sensor

6. What ensures their accuracy


7. What do they transmit to


8. Where is the depress valve

1,3,5,7 LH 2,4,6,8 RH

9. How are the water tanks numbered and location

2 LH side of aft Cargo

10. Where are the water compressors and how many


11. What is the normal operating pressure of the pot water sys

At the top

12. Where is the air manifold in relation to the tanks

2 px sw (lo and hi) o/px vlv (130psi), gnd px connection, filters and a check vlv

13. What are the components of the manifold

RHS of aft cargo

14. Where is the potable treatment module located

A circulation pump, a scaling inhibition module (uses a magnetic tube), a heater, and a control unit

15. What are it’s components

On gnd if water temp of tanks <10C and OFF >13c. In Flight if ambient temp of the heating disinfection unit <10C

16. When does the pump run

<10 ambient or if water <6 if the pump is running

17. When does the heater come on


18. What temp does a lavatory water heater heat to

Lavatory Water Supply-Assembly Control-Device

19. What controls the lav water temp


20. How long does cleaning mode last

lights to show 115v 28v, heater, cleaning mode lighted button

21. What indications are there on the LWSACD

MPI fitted to toilet or GWDU frame

22. What is the LWSACD connected to? And where does that device live


23. What is the main controller of the potable water sys

CIDS directors

24. What manages the data exchange between potable water and A/C systems

FAPs, OMS, LGERS, Coding Module for location info.

25. What systems does it talk to

Quantity,Pre-selection,Status Information, Service relevant failures,Maintenance Information

26. What does the PWIP display

Water Qty graph, Fault area, Func Mes area, Maint required area.

27. What are the main area of the display

potable water quantity, A/C configuration (location of lavatories and galleys),system status, failure messages, Water pre-selection ("Pre-Select" button), Optional isolation ("Shut Off LH" and "Shut Off RH" buttons), system depressurisation ("Shut Down" button).

28. What is on the water/waste FAP display

PWIP open depress valve, Compressors off, Depress valve closed after 5s (opens again after landing), water heaters off (due to low water level). The toilets will still work

29. What will happen with an inflight water supply shutdown

Tanks (with separator and filter), vacuum generators and waste drain valves, overboard check valves, toilet assy, GWDUs, Hi lvl sensor, 2 absolute px sensors,

30. Components of the waste system include

MD LH side, MD RH side,UD LH side, UD RH side.

31. How are the pipes arranged

On ground and below 1600ft

32. When do the vacuum generators operate

4 -> 9psi below cabin px

33. What is the pressure generated

2. 1 Fwd and 1 Aft

34. How many drain masts and where

under floor area behind the bulk cargo

35. Where are the waste tanks

MD is 675 ltrs, UD is 373 ltrs

36. What is the capacity of the tanks

Dry and Wet. Dry needs flush pressed twice in 1 second

37. What flush Modes does the GWDU have and how are they initiated

OFF is ready to use, Green is wet flushing, Flashing Green is dry flushing. Amber shows it can’t be used.

38. What do the light colours of the GWDU signify


39. What must you remember to do to use the GWDU

It starts an auto dry flush whether closed or not. BUT ONLY 3 times! It then stops the water supply

40. What happens if it get too full


41. What will happen after 3 attempts to clear the BOWL FULL signal

MCI(Motor Controller Interface) next to bulk cargo door.

42. What controls the Vac blowers and where are they

The MCI is connected to the MPI and the service panel and the tank high level sensor

43. What are they connected to

MPIs,MCIs,Hydrostatic and ambient px sensors, high level sensors. They talk by CAN bus.

44. Which waste components have microprocessors and how are they connected


45. How does waste sys this info get to the A/C systems and which sytems


46. What is the main controller of the waste system

1 Bar Graph 0-100% for water, LH + RH (UD and MD) Bar Graphs for waste

47. How does the FAP display the water and the waste qty

The last preselect from memory or 100% if there isn’t one.

48. What will the water tanks be filled to if no preselect


49. What is the maximum psi for manual fill

5 mins

50. How long after selecting ‘DRAIN’ in the PWSP does the FWD drain vlv open


51. What is the diameter of the waste drain pipe outlet

35 l

52. How many litres is the precharge per tank

Through the rinse lines at a maximum pressure of 50 psi

53. How is it applied


54. What will the level show on the FAP afterwards

Caution light top left of FAP with a message window on both FAP and PWIP

55. What and where are the indications of pot water failure

Every 6 months

56. How often is pot water disinfection done

Via OMS task or on PWIP (hold button for more than 5s) Close all shutoff valves and fill to 100%

57. How is it done

They run automatically

58. What about the humidifiers

Landing Gear

4. doors. Front 2 hydraulic rear 2 mechanical

1. How many NLG doors and how are they operated

4. Main hydraulic, Auxiliary mechanical (with main door), Fixed fairing door and hinged door (both gear driven)

2. How many WLG doors and how are they operated

4. Inner hydraulic, centre hydraulic, outer hydraulic, auxiliary mechanical

3. How many BLG doors and how are they operated

upper and lower drag strut, double lock link, 2 downlock springs

4. What are the main components of the NLG

Side stay, Lock links, 3 Down lock springs

5. What are the main components of the WLG

Upper and lower drag braces, Lock links, Down lock springs

6. What are the main components of the BLG

On approach gear down and locked (Known extension length). OPMS in CPIOM G using each OPTS (Oleo-Pressure and Temperature Sensor) via L/G RDCs

7. When and how is self test of oleo extension done

On GND all the time but can only do px (unknown extension) Gross check and cross-reference check with like gear

8. When is the oleo px check done

DC1 DC2 and DC ESS

9. What are the power supplies

3 on lock link, 2 on shock to show extended and centred

10. NLG prox sensors. How many and where

By LGRDCS 4A and 4B

11. How is NLG sensor data collected

3 on lock link, 2 on torque link to show extended, 2 double prox sensors on bogie beam

12. WLG prox sensors. How many and where

By LGRDCS 4A and 4B

13. How is WLG sensor data collected

3 on lock link, 2 on shock to show extended (WoW sensors), 4 prox sensors on bogie beam, 2 on rear axle for steering locked

14. BLG prox sensors. How many and where

By LGRDCS 5A and 5B

15. How is BLG sensor data collected

10.5 degs

16. What is the BLG bogie trim angle

2 near hinges for full open, 2 on uplocks for full closed (sys1 and sys2)

17. NLG doors. How many sensors and where

near hinges for full open, 2 on uplocks for full closed (sys1 and sys2)

18. WLG doors. How many sensors and where

near hinges for full open, 2 on uplocks for full closed (sys1 and sys2)

19. BLG doors. How many sensors and where

WLG and BLG on piston end, bogie beam, cylinder, pintle frame, WLG axles

20. Where is New Protective Material used

High Velocity Oxygen Fuel method applies a coating of Tungsten Carbide Cobalt Chromium

21. How is it made

Dry Nitrogen and MIL-PRF-87257

22. What is the shock filled with

Nitrogen fill at top, fluid drain refill at bottom

23. Where is it serviced

Green for primary and red for secondary

24. How do you know which seal is in use

3 times by closing changeover valve

25. How many times can you activate the secondary and how is it done

The changeover valve must be opened within 7 days

26. What are the secondary seals limitation

NLG and WLG changeover valve is tightened into manifold, BLG it need 3 anti-clock turns and the cap fitted on back to front to show red

27. What are the differences between NLG, BLG and WLG seals

Red Washer underneath, BLG=141, WLG=127 NLG=84

28. how many bloody greasing points and how are they recognised

Load Analysis Tool uses 20 flight parameter inputs and 20 structural load outputs and a neural network. SAR(Smart Access Recorder) is from ACMS

29. What tool do you use after hard landing

All landings < 100ft until <10kts

30. When is SAR data recorded

Send SAR data to Airbus

31. What must you remember to do after completing the Load Analysis for a hard landing

Use the DFDR but send data to airbus to remove 30 day flying limit

32. What can you use if SAR data is not available

GREEN for NLG and WLG, YELLOW for BLG (Yellow Belly!)

33. What LG are done by Which HYD

CPIOM 3+4 receive AFDX signal, 1+2 discrete to L/G RDCs, 28Vdc from SSPC in SEPSC to valves and unlocks.

34. Landing Gear lever talks to what to get gear to move

Neutral held by springs until solenoid operates

35. Where are the selector valves when uncommanded

LGCIS Landing Gear Control Indication System. Sys 1 and 2. Selector valves have a solenoid for each system.

36. How many control systems are there in the LG control and what are they

2 CPIOMs, 2 LGRDCs, prox sensors

37. What is in each system

Only sys 1 has an independent downlink indication circuit.

38. What is a key difference between each system

They take it in turns swapping each full extend/retract cycle on the UP cycle

39. Which sys is in control and which monitoring

CPIOM-G 1+3 sys 1 and 2+4 sys 2

40. What controls the gear operating sequence

CPIOM 1+3 from DC1 and 2+4 from DC2

41. What are their power supplies

door bypass valves, cut-out valves and vent valves

42. Which valves do not operate in normal mode

BLG only. Centre door has 2 (for folding), inner and outer have 1 each.

43. Which doors having locking devices in the actuators and why

1x NUA(dual motor sys1 and sys2) and 2xEUA (A and B)

44. How many actuators on an unlock and what are they

28VDC from SSPC in SEPDC from LGRDC

45. What is the signal for normal and from where

FFCMs( Free Fall Control Modules) or Ground Door Opening Control Handle

46. What is the signal for emergency and from where

G3 and G4 via SSPC from AFDX

47. Which CPIOMs do Uplocks and selector valves

Send discrete signals to LGRDCs for grounding for uplocks and valves selector valves

48. What do CPIOM G3 and G4 do

4 LGRDCs. 4A, 4B, 5A, 5B (A for sys1 and B for sys2) using ARINC 429

49. What is the interface between the sensors and the CPIOMs and what bus type

NLG and WLG to LGRDC 4A and 4B, BLG is 5A and 5B

50. What are their power supplies and which parts of the LG

4 fro relative movement

51. How many sensors on Bogie Beams

Downlocked and shock not fully extended from LGRDCs

52. How is GND/FLIGHT calculated

2 independent channels A and B. A from DC1 and B from DC ESS

53. What is the Free Fall channels and how are they powered


54. Which system is used for Ground Door Opening

Bypass Valves.

55. Which valves for Ground Door Opening

DC ESS or 24v external battery

56. How can you power this

3 cut out and 5 vent that connect supply to return

57. What are the valves in the Free Fall system and what do they achieve

It is a timer system not sequential in 6 steps. 0-7s cut out valve, 7-14s Vent valves, 14-23.5s EUA energised for NLG and WLG doors, 23.5s to 44s Gear EUA for free fall, 44-53.5s BLG door EUA, 53.5 to 63.5s BLG Gear EUA

58. How does the Free Fall System work and what is the method

DC brushless motors

59. What type of motor are the vent and cut out valves

Only the BLG doors can touch the wheels

60. Why don’t the NLG and WLG doors have internal locks

Maint panels removed (to prevent damages to tyres as it folds) and simulate full gear extension using false targets

61. How are the doors closed from a non-normal config

A/C on gnd or one shock not fully extended

62. When is the L/G lever baulk engaged

The BLG Outer door. It weighs 35Kgs

63. Which door safety collar needs special care

The inner doors. Remove maint panel first!

64. Which door needs manual opening and what must you remember

It goes in to intermediate mode so the doors move slowly

65. What happens to the bypass valve on ground closing and why

280kts by software

66. Max airspeed for L/G down and how is it controlled

Below 800ft and gear not down and locked but in landing config

67. When does red flash on L/G control lever

Wheels and tyres

Nose Static Interface Unit (NSIU) and Combined Wheel Speed Interface Unit (CWSIU).

1. What are the interface units called

Rotating Pressure Sensor Assembly (RPSA) which has a px sensor and an antenna

2. What do all the wheels have

It uses an adapter attached to the rotating antenna, the rest use Axle Equipment Drive Shaft (AEDS)

3. How is the nose different


4. what does the tachometer of the CWSIU talk to

LGRDC for px ind

5. What do the static antennas talk to

137tonne 250mm stroke for type V dome

6. What are the spec pf the A380 jack

Normal, Alternate, Emergency, Ultimate, Parking

7. What are the 5 modes of Brake Control System

WLG Left BLG and right BLG

8. What are the 3 braking groups

Primary is digital (CPIOM G(BCS) and IRDC) secondary is analogue (EBCU)

9. What are the 2 redundant systems of the braking system

Primary with Normal and Alternate, Secondary with emergency and ultimate

10. Which system is used with which mode

Park brake handle to PBSELV 4000psi from accumulators body gear only

11. Describe the parking brake ops

12hrs on 3deg slope (1000psi req at each brake)

12. How long can the accumulators supply hydraulic power

ACCUS REINFLATE button.Signal goes to BLG and WLG ECU

13. How can you repressuries if accumulators low before eng starts and what are the signals

Pedal braking (max 2600psi) and Retraction braking, Auto brake, Antiskid

14. What are the normal braking mode functions

NBSELV (2 BLG 1 WLG) and NSV (4 BLG, 4 WLG) in series

15. Which valves and how are they connected and how many

Alternate is the same as normal but no retraction braking

16. What is different for alternate

ABSELV (2 BLG 1 WLG) and ASV (4 BLG, 4 WLG) in series

17. Which valves and how are they connected and how many

Bogie shuttle valve chooses highest pressure

18. How is Normal and Alternate selected

Only pedal braking max 1700psi for RTO. EBCU uses the ABSELV and ASV

19. How does Emergency mode work

Antiskid to off

20. How is Emergency mode selected

Parking brake handle operated. Operates parking brakes of BLG and alternate circuits using EBCU of WLG (max 1700psi) if ground spoilers were selected (ie landing) and BLG 4000. EBCU controls pressures

21. How does Ultimate mode work

Parking brake valves and ULT PRIM discrete

22. What get the WLG involved in Ultimate

GND Spoilers or GND speed and wheel speed < 15kts, 1 eng running and on GND

23. What sets the ULT PRIM discrete

To help prevent assymeteric eng movements

24. Why include WLG in emergency

DC1 or DC2

25. What are the power supplies of CPIOM


26. What are the power supplies of EBCU

BLG is 115 AC2, WLG is 115 AC3

27. What are the power supplies of LEHGS


28. What are the power supplies of Parking brake


29. What are the power supplies of LGRDC

2 accumulators and the related LEHGS

30. How do you depressurise the alternate barking circuits

The ACCU REINFLATE button which runs the WLG and BLG LEHGS

31. How do you repressurise the accumulators

Using the Accumulator and reservoir refill function in BCS part of CMS

32. How do you repressurise LEHGS

ECAM Wheel page show Antiskid/autobrakes, PFD shows brake config, EWD shows memos and triple indicator that show BLG ACCu px and BLG alt brake Px.

33. What displays are there in the cockpit

Alternate braking LP return line

34. How is the LEHGS reservoir refilled normally

LVDT for visual indicator

35. How is LEHGS reservoir level monitored

To prevent take off with hot brake and to prevent hot brake being retracted and to monitor residual braking

36. Main Functions of BTMS

Brake Temperature Compensation Modules. WLG bogie top surface, BLG aft left surface of bogie

37. Where do BTS send their data and where are they

To LGRDCs via analogue and ARINC429 to CPIOM G3+4

38. And where do these modules send data and how

Left BLG and WLG DC1 and right DC2

39. How are the BTMSs energised

Tyre px transmitted is digitised by RPSA via rotating antenna. Static antenna in NSIU or CWSIU to LGRDCs. Each of which can have 8. ARINC 429 to CPIOM G3+4 and AFDX to the rest of the fuckin world

40. What is TPIS journey

BLG and WLG essentially the same. 2x NBSELV (solenoid op to isolate hydraulics. Only 1 on WLG) 4 NSV (Normal Servo Valves) which are torque motors to regulate px to an axle. 4x BSV (Bogie shuttle valve) to pairs of wheels. Return to LP. 2x return accumulators to smooth brake release.

41. Describe the Hyd components of the normal braking sys

CPIOM and IRDC. Brake pedals, Anti/auto brake and retraction

42. What controls normal braking and what has input

In normal and alternate F/Os pedal to CPIOM via NBPTU (Normal Brake Pedal Transmitter Unit)

43. How are braking inputs transmitted

> 5 m/s

44. When is anti skid active

G1,3 for sys 1 G2,4 for sys 2. DC1 and DC2. G1,2 for COM and G3,4 for MON. BCS receives BPTU or auto brake. CPIOMs send signals to IRDC via ARINC429 and SEPDC via AFDX. Relays and MON from SEPDC to NBSELV

45. Describe the CPIOMs for braking


46. how are IRDCS connected

RTO push button and rotary LO,2,3,HI and DISARM

47. What are the auto brake modes

LEHGS(which cannot be serviced), ECU (can be independent from BCS)

48. Components of Alternate braking

Keeps HP accumulators pressurised.

49. What else does LEHGS do

If accumulator > 4233psi. Otherwise braking pressure from pedals max 1740psi RTO to 1000psi landing

50. In alternate mode when is anti skid avail


51. How many appllictions of brake in Alternate and no accumulator

The EBCU instead of CPIOM and IRDC

52. What controls the emergency mode

LEHGS and the high-pressure accumulator

53. Where does the power come from in emergency mode

7 for 5.5 hrs

54. How many applications on landing after Had Loss

1000psi landing 1740psi RTO

55. What are the pressures applied to brakes in emergency mode

DC 1+2, CPIOMS, IRDC, ADCN, NBPTU lost, anti skid to off

56. What triggers emergency mode

Only BLG in emergency

57. What if IRDC 3 is lost

Captains BPTU (analogue) to EBPTU to EBCU to ABSELV and ASV

58. What is the data path in Emergency

CPIOM inhibit or Antiskid on

59. How can emergency be cancelled

28VDC ESS or HOT BUS if it fails

60. What are the power supplies of the EBCU

BLG has 2 ARVs, WLG has 1. Both have 2 accumulators

61. For the filling of the WLG and BLG alternate circuits what are the differences

After eng start if HP accumulator is < 4859psi or LEHGS not full. Inhibited > 30kts or in flight

62. When does the ARV operate

Selector UP, NBSELV activated (with 500psi) until NLG unlocked or 3s have passed

63. When does inflight braking occur

At least 2 GND spoilers deployed, Hyd available, 2 FCCs, Auto brake set, WLG and BLG compressed

64. What is required to allow auto brake

Lowest BLG accumulator and lowest R and L Alternate PX

65. What does the triple gauge show

F/O to CPIOM, Capts to EBCU

66. What are the brake pedal out outs


67. Max pedal psi

Alternate Emergency mode is when Hyd power is lost and LEHGS supplies Hyd. Emergency Braking is when CPIOMs are lost and signal comes from Capts via EBCU only

68. Difference between Alternate Emergency Mode and Emergency Braking

CPIOM fails or Anti skid switch is set to off

69. What are the conditions that leads to emergency braking

Normal, Alternate, Emergency, Ultimate, Parking

70. What are the braking modes

Lowest Accumulator but HIGHEST brake px

71. What does triple px indicator show when Parking Brake set

Use CMS whee change function which brakes at 435psi

72. What do you do for a wheel change

Ages! Wait 4 to 5 mins with engine switch ON. ENG 1or2 for Green, 3or4 for yellow and appropriate hydraulics.

73. How long does LEHGS take to fill and what do you need to do

Steering System

Normal and Alternate

1. What are the N/WS modes

Powered by Green Hyd via NSSELV. WSCS (in CPIOM) , rudder pedals, hand wheel, autopilot

2. What powers it and where are commands from

The LEHGS using the accumulator and the ASSELV

3. What powers it in alternate mode

DC1 or DC2 with 115 AC3 for LEHGS

4. What are the power supplies

handwheels: +/- 70°, pedals: +/- 6°, Mechanical stops: +/- 75°, Over-steering condition: +/- 73.5

5. What are the nose wheel steering limits

Yellow Hyd from eng 3,4 or elec pumps 115 VAC 3+4

6. Power for BLG steering

WSCS when N/WS > 20degs and speed < 30kts and yellow available

7. What controls it and when is it available


8. What are the BLG Steering limits

CPIOM (WSCS) to IRDC to Bay Mounted Sel Vlv (BMSELV) to SSELV and EHSV

9. What is signal path

Lock selector Valves. They lock the steering wheels

10. What are LSELV


11. Maximum dimension ‘H’ before towing

Brake on,NWS disconnect fault, BWS fault (flashes on oversteer),

12. What are the 3 amber lights on Steering Disconnect Panel


13. Max towing steering angle

AC BUS 3 or 4, ENG 3 and 4 off, N/WS >14degs, Tow switch in tow pos, Park brake off

14. Conditions to activate EMP during towing

WSCS Accum filling via CMS. LEGHS fills itself from LP return.

15. How do you refill the HP accumulator and LEHGS reservoir

Via PRIM 1,2,3

16. How do rudder pedals supply steerig inputs

Isolate the steering system from the rudder pedals inputs

17. What does "PEDAL DISC" button do

Green Hyd and one eng switch(1or2) to ON and 1 main gear compressed and disconnect switch not pinned

18. what is needed to operate Normal Steering

for hand wheels >40kts it reduces proportionally until 100kts when it is 0; For pedals 6degs up until 100kts and then decrease to 2degs by 150kts

19. How is steering angle affected by a/c speed on T/O

For pedals 0 degs at 150kts then 6 degs froml 100kts

20. How is steering angle affected by a/c speed on Landing

11degs inboard and 15degs outboard

21. What are the max angles of BLG steering

analogue from hand wheels and to PRIM for pedals. Both go to CPIOM

22. N/WS signals from hand wheel and rudder pedals are

The CPIOMs G1 & G2 do the monitoring (CPIOM MON) and G3 & G4 do the commanding (CPIOM COM).

23. For steering which CPIOM do monitoring and control

ENG start switch, towing switch, GND from LGCIS

24. What discrete signals do the CPIOMs receive

Via AFDX to SEPDC and via ARINC 429 to the ECU

25. How do CPIOMs send out orders

RVDT from steering

26. What Feedback do the CPIOMs receive

Discrete from RELAY MON

27. how are ARV, NSSELV and ASSELV controlled

Analogue from CPIOM

28. How is the EHSV controlled

keep the pressure in the block at 216psi

29. What does the pressure maintaining valve do

They prevent cavitation by controlling return rate in return line

30. How do the anti shimmy valves work

21.25degs but between 21 and 21.5 only one is rotating the N/WS

31. At what point do the retract/extend actuators change to extend/extend

TOW switch not ON, PARK BRK on, EMP u/s, BWS fault, NWS stationary for 120s, NWS <10 deg for 20s

32. What are the conditions of the EMP auto start inhibition

NWS @ 14degs but only moves at 20degs. From 20kts to 30knots it decrease to 0degs

33. When does BWS become active

6. inhibited, free castor self centre and lock, Semi Active, Semi active Transient Unlock, Active, Transent lock

34. How many BWS system rates are there and what are they

6degs per second

35. What is the maximum steering rate

flight controls

Control, Computation, Actuation, Indication

1. What are the 4 blocks of the Primary (and Secondary) flight control system

PRIM1 and SEC1 = DC ESS, PRIM2 and SEC2 = DC EHA, PRIM3 and SEC3 DC 1

2. What are the computer power supplies

Green and yellow hydraulics

3. What powers the electrical backup system

AC ESS BUS (E1), AC EHA (E2), AC BUS 1 (E3).

4. What are the Servo Control Power supplies

side stick, rudder pedal etc/ PRIM, SEC,elec backup, FCDC/ flight cont surface/ PFD,SD,EWD

5. Primary Flight control /computation/actuation/indication is

Flap lever/ SFCCs/ surfaces and transitions/ PFD

6. Secondary Flight control /computation/actuation/indication is

1 = DC ESS, 2 = DC 2

7. SFCC power supplies

FLAP =Green and yellow hyd, Slat = green and elec motor AC ESS

8. What powers the flap PCU and the Slat PCU

14 that transit analogue data to Backup Control Module etc

9. How many potentiometers in the SSTDU

Locked by a solenoid

10. What happens to Side Stick when AP engaged

The pedal feel and trim unit, pedal damper and friction unit and 2 transducer units.

11. What are the rudder pedals connected to

The pedal feel and trim unit

12. Which of the rudder units gives position info

No Sir it is not!

13. With speed brake arming and position is spoiler deflection proportional to lever position

No. In Automatic Mode they are inhibited. They are for manual use only

14. Are the Pitch Trim Switches always useable

The Backup Control Module

15. What do the Pitch Trim Switches connect to

SEC 1 and SEC 3

16. What is the Rudder Trim Switch connected to

Accelerometer Units, Gyrometer Units

17. What else has an input to primary flight controls

14 4 give vertical (Z) 4 give lateral(Y). these 8 are in fwd cargo centre line. 3 each outboard Pylon for vertical for LAF

18. How many Accelerometers and where

19. How many rate Gyros

Analogue feedback of surface deflection to all computers except Backup Control Module for Law calculation

20. What do the elevator and rudder transducer units do

3 px sensors and 1 px switch in each manifold. BCM doesn’t get told though

21. How is the availability of the hydraulics know by the Flight Control Computers

2 LRUs called Flight Control and Guidance Units (FCGUs) A and B

22. What makes up a PRIM

It is an LRU with A + B

23. How makes up a SEC

A or B is COM or MON depending on what it is connected to. COM creates order, MON verifies it and sends if happy. COM and MON both receive the feedback

24. How do the channels of SEC and PRIM work

Via the FCDC in CPIOM-C

25. How are PRIMs and SECs connected to the ADCN

PRIMs and FCDCs but not SECs

26. Which of PRIMS SECS and FCDC talk to CDS


27. What sends data to FWS

Ailerons, Elevators, and all spoilers except 5 and 6

28. Locations of conventional servos

HP inlet and filter, LP outlet, accumulator, mode LVT (Elevator has a servo spool LVT as well), bleeding device, mode solenoid valve, and a Servo valve(obvs!), LVDT for the rod and RVTD of the surface( elevator only)

29. List components of Aileron and Elevator conventional Servo

HP filter, Solenoid valve and the Servo Valve

30. Which are LRUs

Active and Damping

31. What are conventional Servo modes


32. What does the inner loop control feedback

HP filter and inlet, LP outlet, Maintenance device, Servo Valve

33. List components of spoiler conventional Servo

HP filter and Servo valve

34. Which are LRU’s

Hydraulic(extend by order blocking valve open), Retracted (return to 0 if lost command ), Blocking (In case of hyd loss- can’t be extended blocking valve closed), Maintenance

35. What are the conventional spoiler servo operating modes and how

OBD aileron, MBD aileron, elevators

36. Where are EHAs installed

HP inlet LP outlet, mode solenoid valve, mode LVT, accumulator, hyd pump, AC motor and Electronic Module

37. What are the components of the EHAs

Only the Electronic Module

38. What bits are LRUs

Active (normal mode when paired servo is in damping mode) and Damping (normal mode when the paired conventional servo is operating)

39. What are EHAs operating modes and how

28VDC for the Electronic module control and monitoring and 115v via RCCB for the electric motor

40. What are the EHA power supplies


41. Can you use active mode on the GND

Rudders and spoilers 5 and 6

42. Where are EBHA installed

It is slower

43. How does the electrical mode of the EHBAS compare with the hydraulic mode

HP inlet and filter, LP outlet, accum, elec motor, hyd pump, mode solenoid for each of elec and hyd motor, an LVT for each of Elec, hyd and servo valve spool, Servo valve and the electronic module.

44. What are the main components of the EBHA

Hyd mode solenoid, Servo valve, HP Filter, Electronic Unit

45. Which are LRUs

Damping(no electrical power supplied), Electrical Active (using Electronic Module and 115v via RCCB), Hydraulic Active( the normal mode for an EBHA. No 115v)

46. What are the Rudder EBHA operating modes

The differential pressure LVDT

47. What prevents force fighting

Electrical Active

48. Which mode is inhibited on ground

landing gear down, flaps and slats out, when high rate is required, eng out (High hinge movement), before landing

49. Conditions when rudder EBHA is All In

HP inlet and filter, LP outlet, Solenoid valve. ac motor, hyd pump, accum, servo valve, mode LVT, Electronic Module, Motor drain filter, Maintenance device

50. What are the spoiler EBHA components

HP filter, solenoid valve, servo valve, Electronic Module and Motor drain filter.

51. Which are LRUs

Retracted modes, Hyd active, Elec active, Blocking, maintenance

52. What are the spoiler operating modes

3 PRIMs, 3 SECs. Perform Computation (calculating orders from pilots or Flight Guidance Computers and giving them) and Execution (Actually making it happen)

53. Describe the computers of the Flight Control Sys and state what functions they perform

Only ONE PRIM is master

54. What is the master

MASTER sends orders to the other 5 computers that verify the data and control there own surfaces (EXECUTE) whilst monitoring them (inner control loop). MASTER checks how things are going by looking at a/c response (outer loop) --- and does it’s own surface EXECUTION of course

55. How are orders given and checked

Normal (Pitch control Laws, Lateral control Laws, Protections) . Alternate

56. Describe the Flight Control Laws

Nz vertical. Controls the a/c through load factor demand. The pitch is adjusted according to the loading given by an input. Corrects for pitch in roll and does pitch trim etc

57. Describe the Normal Pitch Laws

Y* Controls roll and yaw. Also provides dutch roll damping and yaw damping (on ground)

58. Describe the Lateral Normal Law

AOA (prevents stall at low speed and wind), Load Factor (-1g to 2.5g and 0g to 2g hi lift), Pitch attitude (-15 to 30, -15 to 25 lo spd), High speed, Bank Angle (66degs, 60degs hi lift)

59. Describe the Normal Protections

The controls are less efficient. The protections can be overridden except Load Factor Prot

60. How is Alternate Law different

Uses stabilised Direct pitch law. THS is now manual, Roll Direct law and Yaw Alternate Law with Yaw Damping. NO PROTECTIONS

61. How is Direct Law different

O/B 2 conventional (1 computer), M/B and I/B by 1 conventional (connected to Backup Module of I/B) and 1 EHA.(1 PRIM and 1 SEC each).

62. How are the ailerons driven and controlled

Asymmetrical ops is allowed except for O/B where opposite equivalent servo is also locked out.

63. What happens with Aileron failures

Each rudder by 2 EBHAs. 1 PRIM and 1 SEC connected to each. Upper EBHA of each rudder is connected to a Backup Control Module. Upper is Active, Lower is Damping in Normal Mode

64. How are the rudders driven and controlled

Each is controlled by 1 conventional and 1 EHA. 1 PRIM and 1 SEC to each servo. O/B elevator servos connected to Backup Control Modules. G hyd on L, Y hyd on R

65. How are the Elevators driven and controlled

2 hydraulic motors (1 PRIM and 1 SEC each) and 1 electric (only on earlier a/c) (only 1 PRIM). Yellow Hyd connected to Backup Control Module

66. How is the THS moved and controlled

G and Y HCM, Ballscrew, gearbox, A and B position resolvers, Secondary Load path Loading Det Dev

67. What are the components of the THS

Hyd motor/brake assy, Hyd Vlv Block, Servo vlv with LVT, Brake SOV A and enable SOV B, Px Sw

68. What are the components of the HCM

Hyd motor and pos sensors and POB with LVT

69. What are the components of the HMB assy

SULLDD and SLLLDD (upper and lower!) detects secondary loading and stops operation (by order of PRIMs)

70. How is the SLLDD arranged and what do they do

1 servo per spoiler. All except 5 and 6 are conventional. 5 and 6 are EBHA. All controlled by 1 computer

71. How are spoilers controlled and driven

Opposite is locked out for all but EBHA

72. What happens for a servo failure

Ailerons plus spoilers 3 to 8 and rudder for yaw. spoilers do not fully deflect for roll function

73. How is roll performed

Inner is the computer in control of it’s surface, Outer is the MASTER looking at the response of the aircraft using gyros ADIRU (to PRIM and SEC) and rate and gyros (to PRIM only and used as primary feedback)

74. What constitutes the inner and outer loops

The lateral function coordinated turns. Helps with Dutch Roll prevention

75. What does the rudder do

Using PRIMs only

76. How is rudder travel limitation achieved

Yaw rate gyro and accelerator units and ADIRU. The gyro and accell are the primary sources

77. Where else does rudder info include

The Pedal Feel and Trim Unit using springs. 2 trim motor (active/stby) and 4 RVDT

78. How is rudder feel provided and what else does it have

To the SECs. Then to the Pedal Feel and Trim Unit to move motors. The PRIMs and SECs then signal EBHA to trim Rudder

79. Where are rudder trim commands sent

FG talk to MASTER who talks to SEC to move pedals

80. How is rudder trim done in AP

The upper rudder has a cam device between it and the a/c structure to avoid free play around 0degs

81. What does the rudder have to aid passenger comfort

Slat/flap pos. Fully ext = .25degs/s and fully in = .15degs/s

82. What affects THS movement rate and what are the rates

It resets to 0degs

83. What happens to the THS after landing

Automatic. In normal Pitch Trim switches are isolated

84. What has priority for THS, Manual or Automatic

Pitch gyros (only to PRIMs) and accels and ADIRU

85. Where else does elevator and THS info come from

1 to 8 all vary depending on speed/ lever pos etc. THS adjust pitch. Roll takes precedent. AOA and Go-around retracts them.

86. What things happen with spoilers

All spoilers and ailerons full up. Prevents bounce on touch down, decelerates it and sticks it to the runway

87. When and how lift dumping

WLG down, wheel speeds, level armed, all throttles at idle and one at reverse

88. What triggers the lift dumping

When on one WLG touches down

89. When does phased lift dumping occur

Avoids interference between spoilers and flaps. Lifts spoilers 5degs if 1. On gnd < 60kts flaps moving. 2. On gnd 1 eng running. Uses LGERS, ADIRS, EECs and SFCC

90. What is spoiler lift function and what computers are involved

Passive Turbulence Alleviation (Loads during manoeuvres using ailerons and spoiler 6 to 8 and inner elevators. stops 5s after) and Active Turbulence Alleviation (uses acceloromters on o/b pylons. PTA + >240kts. uses I/B and M/B ailerons. no pitch) Not avail with full flaps

91. Types of LAF and what are they

RAT providing electrics but not hyd, or 1 EMP or hyd GND cart, or both Hyd px and at least 1 engine per wing

92. What are the conditions to lift EHA and EBHA electrical inhibition on the ground

When all PRIMs and SECs are lost or not powered. Normally PRIM2 and SEC2 send inhibit to the POWER SUPPLIES

93. When does the Backup Control Module come in to play and how does it know

2 backup power supply units and a Backup Control Module

94. What is the Backup Control System made up of

When PRIM 2 and SEC 2 don’t send inhibit to Power Supply Units

95. When is the BCM ENERGISED

When PRIM1+3 and SEC1+3 don’t send inhibit to BCM

96. When is the BCM ACTIVATED

Whenever it is Energised and Activated

97. When is the BCM module operative

If all computers off and 1 hyd powered own ground

98. When could it become operative

It takes pilot orders (from specific side stick sensors and RVDT in PFTU and pitch trim sw) and controls surfaces using its own gyros (1yaw, 1pitch… no roll gyro)

99. How does the BCM work

conventional servos for I/B ailerons and O/B elevators, rudder EBHAs, THS if all computers lost. If P3+S3 ok then it only centres O/B elevators

100. What surfaces does it control

Aileron = -28 -> +38, Elev= -20 -> +35, Rudder= +-30, spoiler 1,2 =0->35, spoiler3,8=0->50

101. What are the ranges of the control surfaces on the flight control ECAM page

with any hyd running

102. When is the EBHA and EHA inhibition cancelled

enter ZFW and ZFCG in FMS

103. How do you get the green box for pitch trim

By a cyan index between the 2 surface indications and on pitch trim sw module

104. How is rudder trim position display

Max roll deviation. Removed in flight

105. What does a green line over the spoilers represent

An amber rectangle = deployed and u/s, an amber number = stowed and u/s

106. What are the spoiler fault indications

It’s symmetrical twin is blocked so long as its not an EBHA

107. What else happens if a spoiler fails

Secondary Flight Control Computers

108. What does SFCC stand for

Manual from Slat/Flap control lever and 5 Auto for protection. Slat Baulk, Slat Alpha lock, Flap Load Relief, Flap Auto Command, Slat/Flap Cruise Baulk

109. What are the 2 types of command and how

2. Slat and Flap are separate channels in each one

110. How many SFCC are there and how are internals arranged

Flap lever positions 2 to Full only. Moves them back a setting if CAS > 2.5 Kts over max (VFE + 2.5kts)

111. When is the Flap Load Relief function available

In Position 1 only. Gives 2 positions according to airspeed. CAS < 212kts = 1+F. At 212kts the Flaps retract

112. When is the Flap Auto Command activated

SFCC1 controls and monitors electrical, SFCC2 does Hydraulic (For flaps I guess 1 does Green and the other does yellow maybe)

113. Which SFCC component controls which parts of the slat PCU

SFCC sends to enable solenoid vlv. Then brake solenoid vlv. POB releases and SFCC controls servo valve

114. How does the hydraulic side of the flap or slat PCU work

By the SFCC

115. How is the Hydraulic pressure monitored

115VAC from SFCC controlled RCCB. POB released as are the WTBs when signal from SFCC received by Electronic Module

116. How does the electrical side of the slat PCU work and where is the power from

Electrics on slats are energised to release by SFCC. Only 1 of the 2 solenoids needed. The flap WTB are hydraulic and controlled by SFCC. They each are suppled by BOTH hyd circuits

117. How are the wingtip brakes released

By the Asymmetry Pick-Off Position Units (APPUs) being compared to Feedback Pick-off Position Units (FPPUs) and also the the switches of the flap interconnection strut

118. How are the flap/slat positions monitored

Overspeed, asymmetry, runaway, uncommanded movement or a jam. Also control level failure or misalignment of the flaps

119. What can be the abnormal operations monitored by the SFCCs

The detecting channel powers off its POB and WTB. If the other channel doesn’t detect the same fault then dual control concept kicks in and takes over operations. Otherwise the system is locked out

120. What happens when and abnormal operation is detected by the SFCCs

the APPUs

121. What measures overspeed


122. What measures uncommanded movement or jam

Adjacent flap prox switch is FAR

123. How is misalignment detected

SFCCs check both valid and invalid position including out of detent

124. How is the flap lever monitored

The slat PCU electric motor is inhibited on ground if no hydraulic power. If green hyd is available slats can run at full speed with electrical power on and the flaps at half speed. If only yellow then slats can’t move. An on ground function can overcome the inhibit

125. Which parts of the slat/flap are inhibited and when

1 x T-gearbox, 2x bevel gearboxes, 2 x Kink gearboxes.

126. What are the slat sys gearboxes per side

Transmission shafts, steady bearings and system torque limiters

127. What is on the drive side of the slats

2 per surface. 12 geared rotary and 4 droop nose

128. How many slat actuators per surface and what are they

2 solenoids (1 to each SFCC), brake system, sensor and target (only to SFCC 1 !!), manual release

129. What makes up slat WTB

2 solenoid valves and 2 hyd blocks (1 to each SFCC), brake system, sensor and target (only to SFCC 1 !!), manual release

130. What makes up flap WTB

One is enough to release it. An initial pull in current is supplied to release it and then a lower current holds it.

131. Describe the slat WTB solenoid

each pre flight. WTB ON = no power = FAR, WTB OFF = powered = NEAR

132. When is the WTB prox switch tested and what does it send (flap and slat)


133. What are the slat and flap WTBs lubricated with