BITE Test of the Three-Axis-Accelerometer through the MCDU

TASK 31-33-00-740-801-A
BITE Test of the Three-Axis-Accelerometer through the MCDU

FIN: 6TU

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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 31-32-00-860-008-A	Procedure to Get Access to the SYSTEM REPORT/TEST/INST Page
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 31-33-00-861-074-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) Get access to the CFDIU - SYSTEM REPORT/TEST/INST page (Ref. AMM TASK 31-32-00-860-008).

Subtask 31-33-00-865-106-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/CVR/CTL	4RK	E13
** 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 NOT FOR ALL
121VU	AIDS & RCDR/QAR	14TU	K17
** 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

4. Procedure
Subtask 31-33-00-740-052-A

A. BITE Test of the Three-Axis-Accelerometer through the MCDU

NOTE: You can print the available information only when the PRINT> indication shows on the MCDU screen.

NOTE: If different CFDIU standard is installed, the MCDU display will show FDIU or DFDRS related to the used standard.

ACTION	RESULT
1.On control panel 21VU:	On control panel 21VU:
Push the GND/CTL button.	The blue ON legend comes on.
2.On the MCDU:	On the MCDU display:
Push the line key adjacent to the <FDIU/DFDRS indication.	The DFDRS page comes into view.
Push the line key adjacent to the <GND SCANNING indication.	Make sure that no failure related to ACCELEROMETER is shown.
Push the line key adjacent to the <RETURN indication.	The DFDRS page comes into view.
Push the line key adjacent to the TEST> indication.	The DFDRS TEST page with the initial condition SELECT RCDR GND CTL ON comes into view.
Push the line key adjacent to the <START TEST indication.	Make sure that no failure related to ACCELEROMETER is shown.
Push the line key adjacent to the <TEST CLOSE UP indication.	The close up condition SELECT RCDR GND CTL OFF comes into view.
Push the line key adjacent to the <RETURN indication.	The DFDRS page comes into view.
Push the line key adjacent to the <RETURN indication.	The SYSTEM REPORT/TEST/INST page comes into view.
Push again the line key adjacent to the <RETURN indication.	The MCDU MENU page comes into view.
3.On control panel 21VU:	On control panel 21VU:
Push the GND/CTL button.	The blue ON legend goes off.

5. Close-up
Subtask 31-33-00-862-076-A

A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:34:48 UTC