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Book 2 Review


Modules talk to ADCN, modules contain APPS. LRU’s talk to IOMs to get on to ACDN

1. Difference between LRU and LRM

VM is a smart panel talks digitally to ACDN and is dual channel.

2. Difference between VU and VM

AFDX cable on ADCN network by AFDX sw’s.

3. LRM data transfer by

22 option for 23

4. Number of CPIOMs in the system

A-G 7

5. How many types of CPIOM

8 (type A) spilt into side 1 (odd) and side 2 (even)

6. Number of IOMs in the system

For redundancy

7. Why are the IOMs mirrored

AFDX end sys, part of CPU board.

8. AFDX connects to what in the CPIOM

IOMs (429, discrete, LRUs)

9. LRMs connect to outside of AFDX via

3- 4( at a 36 EBAS, OHDS, PADS) and( ATA 21 SCS option)

10. CPIOM ‘A’ has what apps/sub apps and how many


11. What CPIOM controls the energy apps

- 28vdc

12. What power to the IOMs

- 28vdc

13. What power to the CPIOMs

ADCN has AFDX switches A and B networks 8 switches each 8,10,18 don’t exist

14. What does the ADCN comprise of

1 to 9 (no number 8)

15. AFDX switch numbering on network A

11 to 19 (no number 10, 18)

16. AFDX switch numbering on network B

It’s the MP-FAP or the cabin laptop

17. What are the HMIs for accessing the COMM/cabin domain

Data discarded and MM generated. crc last 4-byte data is checked

18. Cyclic Redundancy check fails you get

both A and B networks operating. Normal ops is virtual link to both networks

19. A normal virtual link is

CKPT effect MAINTENANCE TIME LIMITED ITEM class 4 MEL item a/c effect no - after1000fh goes to class 1 – level 1

20. AFDX single sw loss

2 and 6 failed is allowed with B repair interval

21. Double AFDX switch fault REDUNDANCY DEGRADED on ECAM is sw’s


22. MULTI AFDX sw fault on one network. What happens

multiple sw fail on both networks) CLASS1 ( level 2 fault, single chime, master caution) no go

23. Multiple AFDX sw fault-NETWORK DEGRADED is

class 1 level 2 no go ( back up in air is ARINC 429 !) (ECAM AVIONICS NETWORK ALL SWITCHES FAULT)

24. All AFDX sw’s lost

class 4 fault, no a/c effect after 1000fh class1 level1 maintenance time limted item – mel c

25. Single AFDX cable loss is a

It is a class 1 level 1- a/c effect -(no go) (ECAM AVIONICS NETWORK MULTIPLE CABLE FAULT)

26. Multi cable fault. What happens

redundancy they share the same data. mirrored a1<->a2 a3<->a4 etc (side1<->side2)

27. IOM’S are mirrored 1 side and 2 side for

none class 4 fault – 1000fh it goes class 1 level 1

28. CKPT effect for single IOM fail

yes (avionics network multiple IOM fault(REDUNDANCY DEGRADED))no go- no a/c effect- class 1 level 1 fault

29. CKPT effect for multi IOM (non mirrored) fail

yes (avionic network multiple IOM fault (NETWORK DEGRADED)no go- sys effect-class 1 level 2 fault- master caution and chime

30. CKPT effect for multiple mirrored IOM loss

2 and 4 side 2 IOM loss- class1 level 1 -ECAM (AVIONICS NETWORK DOUBLE IOM FAULT)

31. THE two IOM’S that can be inop (special case) non-mirrored are

Only of same type and may need reprogramming

32. Are CPIOM fully interchangeable

Avionics computers freeze their config

33. How does ENG start affect SPP

FIN - Functional Identification Number

34. How are software apps identified in the AMM

apps are done by ATA chapter

35. Where do you find the software for an IOM

no STS will relate to fuel

36. If a CPIOM F fails will the pilot see a CPIOM F message

an IOM converts non-AFDX data, coming from conventional LRUS, into AFDX data used within the ADCN and vice versa.

37. What is the purpose of an IOM


38. How do non subscribers connect to system


HMI’S - MPFAP and cabin laptop

1. Access to cabin domain via

select sw to (NSS AV) .

2. To connect to avionic domain from the OIT

bidirectional gateway/security function between AV. world and AV. domain.

3. Avionic domain the SCI does what


4. Avionic domain data to FLT-OPS domain and cabin domain is via

One Way Diode. An electrical device that gives a single way of communication from its left to its right

5. OWD is

(MAINT GND connection) SW on o/h MAINT panel must be selected.

6. To use PMAT the


7. What units have back up fans


8. Avionic domain printer is

- no.2

9. FLT/OPS printer is

the upper avionics.(2900VU)

10. Location of most of the NSS equipment /boxes is in

main avionics.

11. TPU’S of the NSS system are in the

supplies DVI info to OIT from laptops data info from FLIGHT OPS domain.They make the physical segregation between the Avionics domain and the Flight Ops domain.

12. TPU what does it do

(NSS master switch p/bsw)

13. Hard shut down of NSS is via the


14. F/O OIT access with batt power and on ground via

, battery is not charging

15. Laptop led blinks red means

static data and dynamic data.

16. ANSU OPS- the type of data on the hard disk is


17. What is process for data storage backup in NSS called

To use the PMAT you have to select the MAINT GND CONNECTION switch on the maintenance panel (only 1 PMAT connection at a time and no tests with CAUTION)

18. How do you use PMAT

Isolates NSS/avionics world from the aircraft systems incase of system failure or it is comprimised. It’s a hard shutdown

19. What does NSS MASTER Switch do

DC from HOT BATT BUS, DC BUS and DC ESS BUS used if AC power lost. After 5 seconds a shutdown begins (upto 120s) F/O OIT, OIT-TPU and ARU-AFMR use HOT BAT BUSS up to 120s to preserve data.

20. How do we ensure an orderly shutdown of NSS

An advisory has occurred and the appropriate page has been selected

21. On ECP, steady light on p/b indicates what

An advisory has occurred and the appropriate page needs to be selected

22. On ECP, flashing light on p/b indicates what

Avionics and Flt Ops

23. What domains can be displayed on OIT

Secure Interface Router Unit to connect PMATS AND FAPS and ACARS and the avionic domain

24. SIRU

Servers to supply computing and memory resources to Onboard Information System OIS

25. ANSU ops

Secure Communication Interfaces are gateways(firewall) between the avionics world LRU/LRM and OIS apps and the open world

26. SCI

Passive and active

27. What modes does SCI operate in

Exchange data between avionics world, NSS and HMI

28. ARU ops

supplies aircraft parameters and avionics data from the AVIONICS WORLD to the NSS for recording and for ACMS application needs

29. CDAM

Additional Control Device can be used as a backup of the keyboard for limited functions.

30. ACD

Portable Maintenance Access Terminal is used for access to the Avionics Domain from outside the cockpit

31. PMAT


32. Which domains do the OMT and OIT connect to


33. Which domain does the PILOT's Laptops connect to



1. CMS application is in which Domain and which server

ANSU-OPS 2, has ability to run in battery only mode, backup fan

2. Which is master ANSU-OPS

System stops until P/Ns are the same

3. What happens if ANSU 1 and 2 have different APP p/n’s


4. Access to the CMS can be from

Class 1

5. Failure Classification causing a FD Effect


6. ELOG Book DB lives where

Airman on ground

7. Legal repository for the e-log


8. How to make ELOG entry from Cabin

SCI (Secure Communication Interfaces)

9. To perform Data Loading ANSU-OPS data goes to A/C systems via?

Ground only

10. In what A/C condition is Interactive Mode Available

4 Digit random verification code to be entered in a limited time period

11. Test with caution, what comes up on OMT

Sync is done manually after failure, replacement, Replication is done normally and the master copies to the slave

12. Auto synchronisation of ANSU-OPS database

Is an APP that collect data for moving MAP and other NSS apps etc

13. What is the function of the ABDC (Avionics Broadcast Data Collector) in ACMS


14. CDAM (Centralized Data Acquisition Module) Data Acquisition function is in which world


15. Where is the OMS ACMS DLCS and Main software repository stored

Normal (on ground and in flight) and interactive(and only)

16. What are the 2 OMS mode

Using Real Time Monitoring Function

17. How can the ACMS be used to aid real time fault diagnosis


18. Which LRU is used to load Avionic software

Apps are done by ATA chapter

19. Where do you find the software for a IOM

FIN - Functional Identification Number

20. How is the software identified

Core, config, app

21. What order do you load CPIOM software


22. Can PMAT be used in air

Last CMS data recording stopped for > 120s, >3 eng running for >180s, CAS> 80 kts or a new flight number entered.

23. When is PFR recording launched

System bite, FWS

24. where does the CMF get its fault info from

Indicating and Recording

CAN BUS (for the KCCU) and AFDX ARINC 429 also (incase AFDX fails) fibre for video

1. What are the types of data bus on CDS

CAPTS (DC BUS 1 as backup)

2. Which display systems are powered by the DC ESS BUS in FD

DC BUS 1 and DC BUS 2

3. Which bus is for F/O display system

Hard PP activates the screen positions pre installed application software

4. How do you know the position of the Display Units in flight deck? Hard Pin Programme or Software Pin Programme

Non-critical systems

5. What is SPP for

On the CDS reconfiguration control panels (1313VU/1314VU)

6. Where do you perform manual ND/PFD switching

L1 and R1

7. Where is EWD not available

3 A/C sys or STS, Permanent data, ATC mail box

8. SD Page has how many boxes

Use arrows on keyboard

9. How do you control cursor after track ball failure

GPS1 only from MMR1

10. Where is the normal clock time signal from


11. In degraded mode how long is accuracy considered to be maintained


12. Backup time data is from

C2 STS has priority on the EWD

13. Location of STS page is on which DU

14. MORE in a square box. What does it mean how is it accessed? More info to see for STS. The CLR button on the ECP (or the MORE button??)?????????????


15. Where do aircraft limitations display

ACDN and Arinc 429 backup

16. FWS to CDS/DU, what kind of connection

CPIOM-C1/2(FWS) sends discrete to lights Sounds from FMS to AMU then to speakers

17. What lights the ATTN getters

ABN PROC button on ECP

18. How does pilot select abnormal procedures

C1 and C2

19. Which CPIOM for FWS

IOMs 7 and 8

20. Which IOM’s for FWS

Class 4

21. What class of alert accumulates a time limit

Any detected failure with neither Flight Deck Effect nor Cabin Effect but to be fixed within a time period. 500/1000hrs cat c becomes class 1 if not fixed

22. Definition of Class 4 fault

Flt ph 1 and 12

23. when does flt ph class 4 become class 1

Level 1- crew monitoring (no sound, advisory msg, master caution), level 2 - immediate crew awareness (single chime, advisory, master caution), level 3 - immediate crew reaction (continuous chime, repetitive noise or specific noise, master warnin

24. Airbus Emergency Levels

Designed to allow monitoring of minor faults or allow airlines to manage repair of faults

25. Time Limited Philosophy

AFDX and Canbus/discrete for backup control

26. ECP to FWS connection and backup

All except 7,8,11. Can only be triggered in 5,6,9 and 10. All others are a fault

27. Which flight phase is the tail strike warning inhibited


28. Where does Tail Strike ind appear

Fibre optics

29. How is data transferred from CMV to CDS


30. Video will display on all except


31. FD Acquisition data transfers to FDR via

Aft RHS of upper deck

32. Location of the FDR

Aft cargo fwd end

33. where is 3 axis gyro located

Analogue Arinc 717 havard bi-phase

34. what is the output of the 3 axis gyro


35. what hosts the FDIAF

5mins after power up, 1 eng running, in the air, 5 mins after eng off

36. Automatic FDR recording mode

From the RCDR P/B on overhead panel

37. How does pilot set the recording mode


38. How many CAN busses on an overhead ICP


39. Who has the most limited access to the eLog

Flight Limitation Zone

40. Where is the flap/slat information displayed

CAPT MFD (P/B can switch to SD) and EWD

41. Which CDS displays are powered on battery

The clock backup and to ADCN if clock in SET or U/S

42. What is the time function of the ADIRU for

The failure causes loss of other systems (eg Hyd failure causes others sys fail)

43. What is primary failure

The failure caused by the primary system (eg the flaps)

44. What is a secondary failure

A failure that doesn’t affect other systems (eg Fuel Pump)

45. What is an independent failure

Emergency config. Immediate action required. Continuous Chime. Red Master Warning. Flashing. Red warning msg on EWD. SD sys (if there is one)

46. What are the indications and audio for level 3 messages

Abnormal config. Immediate awareness but not action. Single Chime. Amber Master Caution. Message on EWD if there is one and SD sys if there is one.

47. What are the indications and audio for level 2 messages

Monitor config. Amber msg on EWD. SD sys page if exists

48. What are the indications and audio for level 1 messages

Via discrete ARINC429 and AFDX to the switches and CDS.Data comes from FWS (CPIOM C1,2 IOM 7,8)

49. How are they transmitted

8 cruise

50. What is the default flight phase

500/1000 hrs

51. What timers are associated with class 4 messages

Concentrates Video signals from multiple sources (Concentrator and Multiplexer for Video)

52. What does the CMV do


53. What systems are connected to CMV

Using Fibre optics.

54. What and how are pictures displayed on the CDS for CMV

2 probes, 2 loops in series. done by flt phase as to fault or strike Level 2 for strike with LAND ANSA (Ph 6,7,11)

55. what is in the tail strike system

Segregated canbus

56. what backup signal output from KCCU

Self monitored and monitored in a loop by another DU

57. how are DU’s monitored for failure

Electrical power


1. What AC BUS normally powered

115v 150KVA 370-770Hz


115v 120KVA 400Hz


115v 70KVA 370-800Hz



5. APU and ENG GGPCU interchangeable


6. APU and ENG GEN interchangeable


7. AC BUS 1 priority supply


8. Where do you see battery condition

AC BUS 2 (TR1) and AC BUS 3 (TR2)

9. DC1 and DC2 normally powered by

AC Bus 2 and DC Bus 1

10. TR1A Power supply

Rectifies AC-DC up to 300A, Controls the Battery Line Contactor

11. TR does what


12. A primary function of Batteries


13. Lost 4 Engines and RAT is deploying. Which BUS is powered

Static inverter

14. What powers the AC EMER BUS


15. GND SRVC from which GND PWR

SPDBs (1-6 cabin, 7-8 cargo)

16. What manages the commercial loads

1,2,3,4,ESS and EMER

17. What are the main AC busses

Physical check,

18. What 3 ways can the state of some thermal cbs be determined

AC BUS1 with AC BUS4 as a backup

19. Which main Bus normally supplies the AC essential Bus

AC BUS 4 and RAT

20. What alternative sources does the AC ESS BUS have

21. What indications are there of VFG bite messages

No needs to be replaced

22. Can a VFG be reconnected after being disconnected

23. How is each battery connected in a batteries only condition on the ground

Till it dribbles out of over flow and shows on sight glass

24. What is the procedure for filling the VFG with oil

Who knows!!!

25. What are the names of the power distribution centres/boxes and where are they located

Use the c/b control switch

26. If you are trying to change the state of electronic cb's and it is not working what might you have forgotten to do

27. What are the functions of the GGPCU

28. How will SPDBs be affected if the ADCN network to them fails

Onside TRU powered from HOT BATT BUS

29. what controls and protects battery

Closes IBLC

30. what happens if TRU fails


31. how many buses can a single ext source or generator supply

Static inv powers it until RAT deploys

32. what happens if theres no power to AC ESS bus


33. what looks after power of RAT and main generator

SRPS -Safe Redundant Power Supply (4 cards)

34. what supplies power to cards in PEPDC

DC ESS and static inv to get AC EMERG (DC BUS 1 and DC BUS2 NOT supplied)

35. what do you get if BATT 1 and ESS BATT selected

ELEC DC page (the OMT; F/O OIT is also powered on BAT only)

36. what indications do you get on batt power only on power up

AC and DC EHA buses for TEFO only (because HYD pwr is lost!)

37. whats difference for TEFO and LMES

RAT continues to operate the bus.

38. Following a TEFO with RAT supplying AC ESS BUS. If all power is recovered what will then feed the AC ESS BUS

select Bat 2, and if ADIRU is on ground with the remote ctrl c/b switch PDMC2 and OMT powered to check/isolate SEPDC and RCCBMS

39. To use control and monitoring devices on bat only


40. Normal GND power connection sequence


41. DC BUS ESS normal config for Bat and LC


42. How does DC BUS 1 connect to DC ESS BUS


43. In normal config how does TRA2 connects to which AC BUS

STATIC INV or the emergency generator via the AC ESS BUS

44. In EMERGENCY config how does AC EMER BUS powered

Main Avionics

45. Where is the location of the PEPDC

2 - side 1 and side 2

46. How many sides does PEPDC have

PEDMU (4 cards 1.1, 1.2, 2.1, 2.2)

47. In the PEPDC which LRU provides interfaces to the electronic units that interface with (LRM/LRU/PCDM/RCCBs)

Through the PEDMU

48. How does PEPDC command data loading from the open world

Memorisation of the CB condition connected to the RCCB (It is not connected to PEDMU OR RCCB only to RCCBM)¯\_(ツ)_/¯ I got lost on this one! Can’t even make out his words on the recording

49. What is the function of the STRM


50. Which CPIOM controls electrical network

Fan air

51. How is VFG oil cooled


52. Signal of the POR for the gen to be connected is controlled and monitored by


53. Which LRUs in Electrical sys manage and control the LCs


54. Another function of the PCDM (Primary Contactor Driver Modules) to control the transfer circuit. What is being controlled

5 and 6

55. The GGPCU for GEN A and B is

ELC1 (to connect BAT 1 to DC ESS BUS) and IBLC1 to connect DC BUS 1 to DC BUS ESS

56. In the Emergency Power Center which contactors for emergency power supply


57. For transfer circuit of DC contactor in control is


58. How do you reset a TR


59. Which LRUs are responsible for the control and power supply of loads below 15A

Through OIT/ OMT / PMAT

60. How do you access the reset of RCCDs or SSCB

Capts l1 l2 l3 EWD (SD) on F/O side OIT etc.

61. On capts side and f/o side what is powered when on BATT power only