DOC AIRBUS | AMM A320FFunctional Test of the Three-Axis-Accelerometer with the MCDU
TASK 31-33-00-720-803-A
Functional Test of the Three-Axis-Accelerometer with the MCDU
Self explanatory
2. Job Set-up Information
A. Referenced Information
3. Job Set-up
Subtask 31-33-00-861-077-A
Subtask 31-33-00-720-052-A
Subtask 31-33-00-862-079-A
[Rev.10 from 2021]
2026.04.01 00:34:51 UTC
Functional Test of the Three-Axis-Accelerometer with the MCDU
FIN: 6TU
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TASK 08-21-00-200-001-A | Quick Leveling Using the Attitude Monitor |
| TASK 08-21-00-200-001-A-01 | Quick Leveling with a Spirit Level in the FWD Cargo Compartment |
| TASK 08-21-00-200-001-A-02 | Quick Leveling Procedure with the ADIRU |
| TASK 08-21-00-200-001-A-03 | Quick Leveling with a Spirit Level in the Passenger Compartment |
| TASK 08-22-00-200-001-A | Precise Leveling |
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 31-36-00-740-008-A | Access to the Parameter Call-Up Menus |
| TASK 34-10-00-860-004-A | Inertial Reference (IR) Alignment-Procedure |
| TASK 34-10-00-860-004-A-01 | Automatic Inertial Reference (IR) Alignment-Procedure |
| TASK 34-10-00-860-004-A-02 | Inertial Reference (IR) Alignment-Procedure to do a Check of the Links between each Flight Management and Guidance Computer (FMGC) and the three Air Data/Inertial Reference Units (ADIRUs) |
| TASK 34-10-00-860-005-A | ADIRS Stop Procedure |
Subtask 31-33-00-861-077-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Before you continue with this procedure make sure that the aircraft is levelled (Ref. AMM TASK 08-21-00-200-001) using the Attitude Monitor or (Ref. AMM TASK 08-22-00-200-001).
(a) Make sure the ADIRS is set to NAV (Ref. AMM TASK 34-10-00-860-004).
Subtask 31-33-00-865-110-A (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Before you continue with this procedure make sure that the aircraft is levelled (Ref. AMM TASK 08-21-00-200-001) using the Attitude Monitor or (Ref. AMM TASK 08-22-00-200-001).
(a) Make sure the ADIRS is set to NAV (Ref. AMM TASK 34-10-00-860-004).
B. Make sure that this(these) circuit breaker(s) is(are) closed:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AUTO FLT/MCDU/1 | 11CA1 | B01 |
| ** ON A/C ALL | |||
| 49VU | SDAC/1 AND 2/28VDC/ESS BUS | 12WV | F05 |
| 49VU | SDAC/1/SPLY | 3WV | F04 |
| 49VU | SDAC/2/26VAC SYNC/AC ESS BUS | 6WV | F03 |
| 49VU | SDAC/1/26VAC SYNC/AC ESS BUS | 5WV | F02 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AUTO FLT/MCDU/1 | 11CA1 | H07 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | EIS/SDAC/1/BUS1/26VAC SYNC AC | 9WV | Q04 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | RCDR/DFDR | 7TU | K16 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | RCDR/ACCLRM | 9TU | K18 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | FDIU | 8TU | K17 |
| ** ON A/C ALL | |||
| 121VU | AUTO FLT/MCDU/2 | 11CA2 | N20 |
| 121VU | HYDRAULIC/HYD/QTY/IND | 1831GQ | P35 |
| 121VU | EIS/SDAC/2/SPLY | 2WV | Q06 |
| 121VU | EIS/SDAC/2/BUS1/26VAC SYNC AC | 10WV | Q05 |
| 121VU | EIS/SDAC/1/BUS2/26VAC SYNC AC | 7WV | Q03 |
| 121VU | EIS/SDAC/2/BUS2/26VAC SYNC AC | 8WV | Q02 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | AIDS & RCDR/FDIMU | 5TV | K15 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | RCDR2 CVR&FDR | 42TU | K16 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | RCDR/ACCLRM | 9TU | K41 |
| 121VU | RCDR2 CVR&FDR | 42TU | K39 |
| 121VU | AIDS & RCDR/FDIMU | 5TV | K38 |
Subtask 31-33-00-720-052-A
A. Functional Test of the Accelerometer
(1) Get access to the ALPHA CALL Up menu (Ref. AMM TASK 31-36-00-740-008).
(2) Enter alpha call-ups LATA, LONA, VRTA, ROLL and PTCH.
(3) On the ALPHA CALL UP page, make sure that these alpha call-ups show the correct values:
(5) If the values of the PTCH and/or ROLL are in the range between -01.0 deg. and +01.0 deg., then the values of LATA, LONA and VRTA, shown on the ALPHA CALL UP page, can be used.
(6) If the values of the PTCH and/or ROLL are out of the range between -01.0 deg. and +01.0 deg., then the values of LATA, LONA and VRTA, shown on the ALPHA CALL UP page, can not be used.
(a) Use alignment formula to calculate the values of LATA, LONA and VRTA with the values of PTCH and ROLL to get the correct values which can be used.
5. Close-up(1) Get access to the ALPHA CALL Up menu (Ref. AMM TASK 31-36-00-740-008).
(2) Enter alpha call-ups LATA, LONA, VRTA, ROLL and PTCH.
(3) On the ALPHA CALL UP page, make sure that these alpha call-ups show the correct values:
- For LATA the value is between -0.04 and +0.04 (nominal 0 g)
- For LONA the value is between -0.04 and +0.04 (nominal 0 g)
- For VRTA the value is between +0.9 and +1.1 (nominal 1 g).
(5) If the values of the PTCH and/or ROLL are in the range between -01.0 deg. and +01.0 deg., then the values of LATA, LONA and VRTA, shown on the ALPHA CALL UP page, can be used.
(6) If the values of the PTCH and/or ROLL are out of the range between -01.0 deg. and +01.0 deg., then the values of LATA, LONA and VRTA, shown on the ALPHA CALL UP page, can not be used.
(a) Use alignment formula to calculate the values of LATA, LONA and VRTA with the values of PTCH and ROLL to get the correct values which can be used.
| +-----------------------------------------------------------------------------+ |
| ! Alignment Formula ! |
| !-----------------------------------------------------------------------------! |
| ! Change Pitch and Roll ! ! |
| ! Angle degree (deg) to ! Angle (Xrad) = 2Pi/360 x Angle (deg) ! |
| ! Angle radius (rad) ! ! |
| !-----------------------!-----------------------------------------------------! |
| ! ! LATA (angle rad) = Sin (roll rad) x Cos (pitch rad) ! |
| ! Change Angle(rad) !-----------------------------------------------------! |
| ! to acceleration ! LONA (angle rad) = Sin (pitch rad) x Cos (roll rad) ! |
| ! !-----------------------------------------------------! |
| ! ! VRTA (angle rad) = Cos (roll rad) x Cos (pitch rad) ! |
| +-----------------------------------------------------------------------------+ |
NOTE: If necessary, you can calculate the values of LATA, LONA and VRTA with the alignment formula. Thus, you must use a pocket calculator with a Degree/Radian conversion function.
Subtask 31-33-00-862-079-A
A. Put the aircraft back to its initial configuration.
(1) Lower the aircraft (Ref. AMM TASK 08-21-00-200-001).
(2) Stop the ADIRS (Ref. AMM TASK 34-10-00-860-005).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(1) Lower the aircraft (Ref. AMM TASK 08-21-00-200-001).
(2) Stop the ADIRS (Ref. AMM TASK 34-10-00-860-005).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).