Flight Data Interface and Management Unit (FDIMU) DFDRS Software Load Procedure

TASK 31-33-00-710-013-A
Flight Data Interface and Management Unit (FDIMU) DFDRS Software Load Procedure

ZONE: 120
ZONE: 210
FIN: 10TV ** ON A/C NOT FOR ALL

1. Reason for the Job

NOTE: You can load the FDIMU DFDRS software through the Portable Data Loader (PDL) or the Multipurpose Disk Drive Unit (MDDU).

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
YV68A100	1	PORTABLE DATA LOADER
YV68A110	1	PORTABLE DATA LOADER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
120	AVIONICS COMPARTMENT
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
824

C. 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 31-36-00-740-012-A	Test of the Flight Data Interface and Management Unit (FDIMU)
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
TASK 31-33-00-00	DIGITAL FLIGHT DATA RECORDING SYSTEM (DFDRS) - INTERCONNECTION - DESCRIPTION AND OPERATION

3. Job Set-up
Subtask 31-33-00-860-084-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) Make sure that the aircraft is in the Ground configuration (the landing gear is compressed and all engines are stopped).

Subtask 31-33-00-010-059-A ** ON A/C NOT FOR ALL

B. Get access to the avionics compartment.
(1) Open access door 824 (Ref. AMM TASK 52-41-00-010-002).
(2) For the location of this component, refer to paragraph Component Location
(Ref. AMM D/O 31-33-00-00).

Subtask 31-33-00-865-075-A ** ON A/C NOT FOR ALL

C. Open, safety and tag these circuit breakers in this sequence:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	AIDS & RCDR/FDIMU	5TV	K15

Subtask 31-33-00-865-127-A ** ON A/C NOT FOR ALL

D. 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
121VU	CFDS/CFDIU/SPLY	2TW	J18
121VU	CFDS/CFDIU/BACK/UP	8TW	J17
121VU	RCDR/ACCLRM	9TU	K18
121VU	RCDR/DFDR	7TU	K16
121VU	AIDS & RCDR/FDIMU	5TV	K15
121VU	ENGINE/ENG1 AND 2/EVMU	1EV	R44
** ON A/C NOT FOR ALL
121VU	PDL/PWR/SPLY	14TD	K19
** ON A/C NOT FOR ALL
121VU	DLS&/DLRB/SPLY	5TD	J15

Subtask 31-33-00-860-062-A ** ON A/C NOT FOR ALL

E. Aircraft Maintenance Configuration for the FDIMU DFDRS Software Load through the PDL
(1) On the front panel of the FDIMU, open the flap to get access to the OPERATIONAL/STORAGE switch.
(2) Make sure that the OPERATIONAL ON/OFF switch is in the ON position.

NOTE: This enables the battery backup buffering of all internal AIDS data stored in the volatile memory in case of external power shut-down.

(3) On the PDL, make sure that the ON/OFF switch is in OFF position.
(4) Connect the adapter cable to the FDIMU front connector.
(5) Connect the adapter cable to the YV68A100 PORTABLE DATA LOADER interface.
(6) Make sure that disk [10TV1] is not in the non write-protected status (write-protection is OFF).

NOTE: Depending on the software version, there can be more than one software disks.

Subtask 31-33-00-860-062-D ** ON A/C NOT FOR ALL

E. Aircraft Maintenance Configuration for the FDIMU DFDRS Software Load through the Portable Data Loader (PDL)
(1) On the front panel of the FDIMU, open the flap to get access to the OPERATIONAL/STORAGE switch.
(2) Make sure that the OPERATIONAL ON/OFF switch is in the ON position.

NOTE: This enables the battery backup buffering of all internal AIDS data stored in the volatile memory in case of external power shut-down.

(3) On the Portable Data Loader (PDL), make sure that the ON/OFF switch is in OFF position.
(4) Connect the Adapter Cable to the FDIMU front connector.
(5) Connect the Adapter Cable to the YV68A110 PORTABLE DATA LOADER interface.
(6) Make sure that all [10TV1] non-writeprotected status (writeprotection OFF).

NOTE: Depending on the software version, there can be more than one software disks.

Subtask 31-33-00-860-055-A ** ON A/C NOT FOR ALL

F. Aircraft Maintenance Configuration for the FDIMU DFDRS Software Load through the Multipurpose Disk Drive Unit (MDDU)
(1) On the front panel of the FDIMU open the flap to get access to the OPERATIONAL/STORAGE switch.
(2) Make sure that the OPERATIONAL ON/OFF switch is in the ON position.

NOTE: This enables the battery backup buffering of all internal AIDS data stored in the volatile memory in case of external power shut-down.

(3) Make sure that all [10TV1] are in non-writeprotected status (writeprotection OFF).

NOTE: Depending on the software version there could be more than one software disks.

Subtask 31-33-00-860-055-E ** ON A/C NOT FOR ALL

F. Aircraft Maintenance Configuration for the FDIMU DFDRS Software Load through the Multipurpose Disk Drive Unit (MDDU)

(1) On the front panel of the FDIMU open the flap to get access to the OPERATIONAL/STORAGE switch.
(2) Make sure that the OPERATIONAL ON/OFF switch is in the ON position.

NOTE: This enables the battery backup buffering of all internal AIDS data stored in the volatile memory in case of external power shut-down.

(3) Make sure that the subsequent disk is in the non-write-protected status (write-protection OFF): [10TV1]

NOTE: Depending on the software version, there can be more than one software disks.

Subtask 31-33-00-865-090-A ** ON A/C NOT FOR ALL

G. Close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	AIDS & RCDR/FDIMU	5TV	K15

Subtask 31-33-00-865-073-A ** ON A/C NOT FOR ALL

H. 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
121VU	CFDS/CFDIU/SPLY	2TW	J18
121VU	CFDS/CFDIU/BACK/UP	8TW	J17
121VU	DATA/LOADER/SPLY	3TD	J16
121VU	RCDR/ACCLRM	9TU	K18
121VU	RCDR/DFDR	7TU	K16
121VU	AIDS & RCDR/FDIMU	5TV	K15
121VU	ENGINE/ENG1 AND 2/EVMU	1EV	R44
** ON A/C NOT FOR ALL
121VU	DLS&/DLRB/SPLY	5TD	J15

4. Procedure
Subtask 31-33-00-710-075-A ** ON A/C NOT FOR ALL

A. FDIU (part of the FDIMU) Software Load Procedure through the Multipurpose Disk Drive Unit (MDDU)

ACTION	RESULT
On the overhead panel, on the Data Loading Selector:	On the Data Loading Selector display:
Put the data loading selector ON/OFF switch to the ON position.	The DB/N:XXXXXXXX and PUSH NEXT/PREV indications show.
Push the NEXT or PREV key until the FDR SYS NOT SELECTED indication shows on the display.	The FDR SYS NOT SELECTED indication shows.
Push the SEL CTL key.	The FDR SYS SELECTED indication shows.
On the Center Pedestal, on the MDDU:	On the MDDU display:
Open the floppy disk access door.	The MDDU READY indication shows.
Put the software disk (FDIU SW) into the MDDU. NOTE: If there are more than one software disks, load all disks until the loading process is completed.	These indications show in a short time: READY, WAIT RESPONSE, TRANSF IN PROG.
NOTE: Dependently from the MDDU P/N it can show the BUS-number and the file-sizes between the messages TRANSF IN PROG and TRANSF COMPLETE. The file-sizes decrease to zero during the data loading. This shows the progress of the data loading.
Wait until the TRANSF COMPLETE indication comes on.	The TRANSF COMPLETE indication shows after the load procedure is completed correctly.
Push the EJECT button and remove the software disk.	The MDDU READY indication shows.
Close the floppy disk access door.
On the Data Loading Selector panel:	On the Data Loading Selector display:
Push the SEL CTL key.	The FDR SYS NOT SELECTED indication shows.
Set the ON/OFF switch to OFF.

Subtask 31-33-00-710-075-E ** ON A/C NOT FOR ALL

A. FDIU (part of the FDIMU) Software Load Procedure through the Multipurpose Disk Drive Unit (MDDU)

ACTION	RESULT
On the overhead panel, on the Data Loading Selector:	On the Data Loading Selector display:
Put the data loading selector ON/OFF switch to the ON position.	The DB/N:XXXXXXXX and PUSH NEXT/PREV indications show.
Push the NEXT or PREV key until the FDR SYS NOT SELECTED indication shows on the display.	The FDR SYS NOT SELECTED indication shows.
Push the SEL CTL key.	The FDR SYS SELECTED indication shows.
On the Center Pedestal, on the MDDU:	On the MDDU display:
Open the floppy-disk access door.	The MDDU READY indication shows.
Put the software disk into the MDDU. NOTE: If there are more than one software disks, load all disks until the loading process is completed.	These indications show in a short time: READY, WAIT RESPONSE, TRANSF IN PROG.
NOTE: Dependently from the MDDU P/N it can show the BUS-number and the file-sizes between the messages TRANSF IN PROG and TRANSF COMPLETE. The file-sizes decrease to zero during the data loading. This shows the progress of the data loading.
Wait until the TRANSF COMPLETE indication comes on.	The TRANSF COMPLETE indication shows after the load procedure is completed correctly.
Push the EJECT button and remove the software disk.	The MDDU READY indication shows.
Close the floppy-disk access door.
On the Data Loading Selector panel:	On the Data Loading Selector display:
Push the SEL CTL key.	The FDR SYS NOT SELECTED indication shows.
Set the ON/OFF switch to OFF.

Subtask 31-33-00-710-075-G ** ON A/C NOT FOR ALL

A. FDIU (part of the FDIMU) Software Load Procedure through the Multipurpose Disk Drive Unit (MDDU)

ACTION	RESULT
On the overhead panel, on the Data Loading Selector:	On the Data Loading Selector display:
Put the data loading selector ON/OFF switch to the ON position.	The DB/N:XXXXXXXX and PUSH NEXT/PREV indications show.
Push the NEXT or PREV key until the FDR SYS NOT SELECTED indication shows on the display.	The FDR SYS NOT SELECTED indication shows.
Push the SEL CTL key.	The FDR SYS SELECTED indication shows.
On the Center Pedestal, on the MDDU:	On the MDDU display:
Open the floppy disk access door.	The MDDU READY indication shows.
Put the software disk (FDIU-Software) into the MDDU. NOTE: If there are more than one software disks, load all disks until the loading process is completed.	These indications show in a short time: READY, WAIT RESPONSE, TRANSF IN PROG.
NOTE: Dependently from the MDDU P/N it can show the BUS-number and the file-sizes between the messages TRANSF IN PROG and TRANSF COMPLETE. The file-sizes decrease to zero during the data loading. This shows the progress of the data loading.
Wait until the TRANSF COMPLETE indication comes on.	The TRANSF COMPLETE indication shows after the load procedure is completed correctly.
Push the EJECT button and remove the software disk.	The MDDU READY indication shows.
Close the floppy disk access door.
On the Data Loading Selector panel:	On the Data Loading Selector display:
Push the SEL CTL key.	The FDR SYS NOT SELECTED indication shows.
Set the ON/OFF switch to OFF.

Subtask 31-33-00-710-095-C ** ON A/C NOT FOR ALL

B. FDIU (part of the FDIMU) Software Load Procedure through the PDL

ACTION	RESULT
On the PDL:	On the PDL display:
Put the ON/OFF switch to the "ON" position.	The Software Loading in Progress.
Put the software disk (FDIU SW) into the PDL disk drive. NOTE: If there are more than one software disks, load all disks until the loading process is completed.	READY, WAIT RESPONSE, TRANSF IN PROG come into view. NOTE: Depending on the PDL P/N, the display can show the BUS-number and the file-sizes between the messages TRANSF IN PROG and TRANSF COMPLETE. The file-sizes decrease to zero during the data loading. This shows the progress of the data loading.
Wait until the TRANSF COMPLETE indication comes on.	TRANSF COMPLETE comes into view after the load procedure completes correctly.
Push the EJECT button and remove the software disk.
Put the ON/OFF switch to the "OFF" position.

5. Close-up
Subtask 31-33-00-865-076-A ** ON A/C NOT FOR ALL

A. Open this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	AIDS & RCDR/FDIMU	5TV	K15

Subtask 31-33-00-860-057-B ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration after the FDIMU DFDRS Software-Load through the PDL
(1) Disconnect the adapter cable from the FDIMU.
(2) Disconnect the adapter cable from the PDL.
(3) Close the door on the front of the FDIMU.

Subtask 31-33-00-865-077-A ** ON A/C NOT FOR ALL

C. Close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	AIDS & RCDR/FDIMU	5TV	K15

Subtask 31-33-00-710-076-A ** ON A/C NOT FOR ALL

D. Test
(1) Do the test of the FDIMU (Ref. AMM TASK 31-36-00-740-012).

Subtask 31-33-00-410-058-A ** ON A/C NOT FOR ALL

E. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

Subtask 31-33-00-860-056-A ** ON A/C NOT FOR ALL

F. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:34:12 UTC