Loss of the Feedback Monitoring from the CAPT PFD DU

TASK 31-63-81-810-944-A
Loss of the Feedback Monitoring from the CAPT PFD DU

1. Possible Causes

DMC-2 [1WT2]
DU-ECAM, UPPER [4WT1]
ND-F/O [3WT2]
DMC-3 [1WT3]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 31-63-00-810-828-A	Loss of the ADC 2 Output Bus by the DMC 2
TSM TASK 31-63-00-810-829-A	Loss of the ADC 3 Output Bus by the DMC 2
TSM TASK 31-63-00-810-837-A	Loss of the ADC 3 Output Bus by the DMC 3
TSM TASK 31-63-00-810-844-A	Loss of the ADC 2 Output Bus by the DMC 3
TSM TASK 31-63-00-810-855-A	Loss of the IRS 2 Output Bus by the DMC 2
TSM TASK 31-63-00-810-856-A	Loss of the IRS 3 Output Bus by the DMC 2
TSM TASK 31-63-00-810-864-A	Loss of the IRS 3 Output Bus by the DMC 3
TSM TASK 31-63-00-810-869-A	Loss of the IRS 2 Output Bus by the DMC 3
TSM TASK 31-63-00-810-991-A	Loss of the ADIRU 1 Data to the DMC
TSM TASK 31-63-00-810-992-A	Loss of the ADIRU 2 Data to the DMC
TSM TASK 31-63-00-810-993-A	Loss of the ADIRU 3 Data to the DMC
TSM TASK 31-63-81-810-960-A	Failure of the A629 BUS from the CAPT PFD DU to the DMC1
TSM TASK 31-63-81-810-969-A	Failure of the A629 BUS from the F/O ND DU to the DMC2
TSM TASK 31-63-81-810-970-A	Failure of the A629 BUS from the Upper ECAM DU to the DMC2
TSM TASK 31-63-81-810-975-A	Failure of the A629 BUS from the F/O ND DU to the DMC3
TSM TASK 31-63-81-810-976-A	Failure of the A629 BUS from the Upper ECAM DU to the DMC3
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002	De-energize the Aircraft Electrical Circuits Supplied from the External Power
AMM 31-60-00-740-004	EIS System Test
AMM 31-60-00-860-001	EIS Start Procedure
AMM 31-60-00-860-002	EIS Stop Procedure
AMM 31-63-22-000-001	Removal of the Display Unit
AMM 31-63-22-400-001	Installation of the Display Unit
AMM 31-63-34-000-001	Removal of the DMC
AMM 31-63-34-400-001	Installation of the DMC

3. Fault Confirmation
Subtask 31-63-81-860-084-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
AMM 24-41-00-861-002
(2) Do the EIS start procedure AMM 31-60-00-860-001

Make sure there is no PFD/ND transfer or no ECAM/ND transfer

(3) On the center pedestal, on the SWITCHING panel 8VU:

set the EIS DMC selector switch to NORM

Subtask 31-63-81-740-330-A ** ON A/C NOT FOR ALL

B. Test
(1) Do the System Test of the DMC2 AMM 31-60-00-740-004

refer tp Para. 4. A.

Subtask 31-63-81-860-085-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) On the center pedestal, on the SWITCHING panel 8VU:

set the EIS DMC selector switch to F/O 3

Subtask 31-63-81-740-331-A ** ON A/C NOT FOR ALL

D. Test
(1) Do the System Test of the DMC3 AMM 31-60-00-740-004

refer to Para. 4.B.

Subtask 31-63-81-740-350-A ** ON A/C NOT FOR ALL

E. Test
(1) Do the System Test of the DMC1 AMM 31-60-00-740-004

refer to Para. 4.C.

4. Fault Isolation
Subtask 31-63-81-810-225-A ** ON A/C NOT FOR ALL

A. If the test gives:
(1) the maintenance message DMC2 (1WT2):

replace the DMC-2 [1WT2] AMM 31-63-34-400-001 and AMM 31-63-34-400-001

(2) the maintenance message DU EWD(4WT1)

replace the DU-ECAM, UPPER [4WT1] AMM 31-63-22-000-001 and AMM 31-63-22-400-001

(3) the maintenance message DU ND FO(3WT2):

replace the ND-F/O [3WT2] AMM 31-63-22-000-001 and AMM 31-63-22-400-001

(4) the maintenance message DU EWD(4WT1)/DMC2(1WT2):

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-970)

(5) the maintenance message DU ND FO(3WT2)/DMC3(1WT3):

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-969)

(6) the maintenance message ADIRU2(1FP2)BUS3 IR/DMC2(1WT2):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-855)

(7) the maintenance message ADIRU3(1FP3)BUS2 IR/DMC2(1WT2):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-856)

(8) the maintenance message ADIRU2(1FP2)BUS1 ADR/DMC2(1WT2):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-828)

(9) the maintenance message ADIRU3(1FP3)BUS2 ADR/DMC2(1WT2):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-829)

(10) the maintenance message ADIRU1(1FP1):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-991)

(11) the maintenance message ADIRU2(1FP2):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-992)

(12) the maintenance message ADIRU3(1FP3):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-993)

Subtask 31-63-81-810-226-A ** ON A/C NOT FOR ALL

B. If the test gives:
(1) the maintenance message DMC3 (1WT3):

replace the DMC-3 [1WT3] AMM 31-63-34-000-001 and AMM 31-63-34-400-001

(2) the maintenance message DU EWD(4WT1):

replace the DU-ECAM, UPPER [4WT1] AMM 31-63-22-000-001 and AMM 31-63-22-400-001

(3) the maintenance message DU ND FO(3WT2):

replace the ND-F/O [3WT2] AMM 31-63-22-000-001 and AMM 31-63-22-400-001

(4) the maintenance message DU EWD(4WT1)/DMC3(1WT3):

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-976)

(5) the maintenance message DU ND FO(3WT2)/DMC3(1WT3):

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-975)

(6) the maintenance message ADIRU2(1FP2)BUS3 IR/DMC3(1WT3):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-869)

(7) the maintenance message ADIRU3(1FP3)BUS1 IR/DMC3(1WT3):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-864)

(8) the maintenance message ADIRU2(1FP2)BUS3 ADR/DMC3(1WT3):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-844)

(9) the maintenance message ADIRU3(1FP3)BUS1 ADR/DMC2(1WT2):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-837)

(10) the maintenance message ADIRU1(1FP1):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-991)

(11) the maintenance message ADIRU2(1FP2):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-992)

(12) the maintenance message ADIRU3(1FP3):

do the fault isolation procedure (Ref. TSM TASK 31-63-00-810-993)

Subtask 31-63-81-810-265-A ** ON A/C NOT FOR ALL

C. If the test gives the maintenance message: DU PFD CAPT(2WT1)/DMC1(1WT1)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-960)

Subtask 31-63-81-860-089-A ** ON A/C NOT FOR ALL

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

[Rev.8 from Aug 2018] 2026.04.04 04:31:07 UTC