Operational Check of DFDR via MCDU

TASK 31-39-00-710-808-A
Operational Check of DFDR via MCDU

FIN: 1TU ** ON A/C NOT FOR ALL
FIN: 3CA1 ** ON A/C NOT FOR ALL
FIN: 3CA2 ** ON A/C NOT FOR ALL

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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
DFDRS TEST

3. Job Set-up
Subtask 31-39-00-861-056-A ** ON A/C NOT FOR ALL

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)

Subtask 31-39-00-865-064-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/MCDU/1	11CA1	B01
** ON A/C NOT FOR ALL
49VU	AUTO FLT/MCDU/1	11CA1	H07
** ON A/C NOT FOR ALL
121VU	RCDR/DFDR	7TU	K16
** ON A/C NOT FOR ALL
121VU	CFDS/CFDIU/SPLY	2TW	J18
121VU	CFDS/CFDIU/BACK/UP	8TW	J17
121VU	RCDR/ACCLRM	9TU	K18
121VU	AIDS & RCDR/FDIMU	5TV	K15
** ON A/C NOT FOR ALL
121VU	AUTO FLT/MCDU/2	11CA2	N20
** ON A/C NOT FOR ALL
121VU	RCDR2 CVR&FDR	42TU	K16
** ON A/C NOT FOR ALL
121VU	CFDS/CFDIU/SPLY	2TW	J41
121VU	CFDS/CFDIU/BACK/UP	8TW	J40
121VU	RCDR/ACCLRM	9TU	K41
121VU	RCDR2 CVR&FDR	42TU	K39
121VU	AIDS & RCDR/FDIMU	5TV	K38

4. Procedure
Subtask 31-39-00-710-060-A ** ON A/C NOT FOR ALL

A. Operational Check of the DFDR System through the MCDU

DFDRS TEST ** ON A/C NOT FOR ALL

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

ACTION	RESULT
1.On overhead panel 21VU:	On overhead panel 21VU:
Push the RCDR/GND CTL button: [31TU]	The blue "ON" legend comes on.
2.On the MCDU front panel:	On the MCDU display:
Push the MCDU MENU button.	The MCDU menu comes into view.
Push the line key adjacent to the <CFDS indication.	The CFDS menu comes into view.
Push the line key adjacent to the <SYSTEM REPORT/TEST indication.	The SYSTEM REPORT/TEST menu comes into view.
Push the line key adjacent to the INST> indication.	The INST menu comes into view.
Push the line key adjacent to the <DFDRS indication.	The DFDRS menu comes into view.
Push the line key adjacent to the <LRU IDENT indication.	The DFDRS LRU IDENTIFICATION menu comes into view. On this page you can read the name of the LRU, the hardware P/N and the software P/N.
Push the line key adjacent to the <RETURN indication.	The DFDRS menu comes into view.
Push the line key adjacent to the TEST> indication.	The DFDRS TEST menu comes into view.
Push the line key adjacent to the <START TEST indication.	The message IN PROGRESS 25S comes into view. After 25s the message TEST OK comes into view.
Push the line key adjacent to the <RETURN indication.	The DFDRS menu comes into view.
Push the MCDU MENU button.	The MCDU menu comes into view.
3.On overhead panel 21VU:	On overhead panel 21VU:
Push the RCDR/GND CTL button: [31TU]	The blue "ON" legend goes off.

5. Close-up
Subtask 31-39-00-710-061-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance 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 08:31:30 UTC