Loss of the Feedback Monitoring from the Upper ECAM DU

TASK 31-63-81-810-978-A
Loss of the Feedback Monitoring from the Upper ECAM DU

1. Possible Causes

DMC-3 [1WT3]
PFD-CAPT [2WT1]
PFD-F/O [2WT2]
DMC-2 [1WT2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 31-63-00-810-874-A	Loss of the EEC 1 Channel A Output Bus by the DMC 1
TSM TASK 31-63-00-810-875-A	Loss of the EEC 1 Channel B Output Bus by the DMC 1
TSM TASK 31-63-00-810-876-A	Loss of the EEC 2 Channel A Output Bus by the DMC 1
TSM TASK 31-63-00-810-877-A	Loss of the EEC 2 Channel B Output Bus by the DMC 1
TSM TASK 31-63-00-810-882-A	Loss of the EEC 1 Channel A Output Bus by the DMC 2
TSM TASK 31-63-00-810-883-A	Loss of the EEC 1 Channel B Output Bus by the DMC 2
TSM TASK 31-63-00-810-884-A	Loss of the EEC 2 Channel A Output Bus by the DMC 2
TSM TASK 31-63-00-810-885-A	Loss of the EEC 2 Channel B Output Bus by the DMC 2
TSM TASK 31-63-00-810-890-A	Loss of the EEC 1 Channel A Output Bus by the DMC 3
TSM TASK 31-63-00-810-891-A	Loss of the EEC 1 Channel B Output Bus by the DMC 3
TSM TASK 31-63-00-810-892-A	Loss of the EEC 2 Channel A Output Bus by the DMC 3
TSM TASK 31-63-00-810-893-A	Loss of the EEC 2 Channel B Output Bus by the DMC 3
TSM TASK 31-63-81-810-922-A	Loss of the EEC 1 Buses by the DMC 1
TSM TASK 31-63-81-810-923-A	Loss of the EEC 1 Buses by the DMC 2
TSM TASK 31-63-81-810-924-A	Loss of the EEC 1 Buses by the DMC 3
TSM TASK 31-63-81-810-925-A	Loss of the EEC 2 Buses by the DMC 1
TSM TASK 31-63-81-810-926-A	Loss of the EEC 2 Buses by the DMC 2
TSM TASK 31-63-81-810-927-A	Loss of the EEC 2 Buses by the DMC 3
TSM TASK 31-63-81-810-960-A	Failure of the A629 BUS from the CAPT PFD DU to the DMC1
TSM TASK 31-63-81-810-964-A	Failure of the A629 BUS from the Upper ECAM DU to the DMC1
TSM TASK 31-63-81-810-968-A	Failure of the A629 BUS from the F/O PFD DU to the DMC2
TSM TASK 31-63-81-810-973-A	Failure of the A629 BUS from the CAPT ND DU to the DMC3
TSM TASK 31-63-81-810-974-A	Failure of the A629 BUS from the F/O PFD 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 31-63-81-860-087-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 31-63-81-740-347-A ** ON A/C NOT FOR ALL

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

refer to Para. 4.A.

Subtask 31-63-81-740-348-A ** ON A/C NOT FOR ALL

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

refer tp Para. 4. B.

Subtask 31-63-81-740-351-A ** ON A/C NOT FOR ALL

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

refer to Para. 4.C.

4. Fault Isolation
Subtask 31-63-81-810-263-A ** ON A/C NOT FOR ALL

A. 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 PFD CAPT(2WT1)

replace the PFD-CAPT [2WT1] AMM 31-63-22-000-001 and AMM 31-63-22-400-001

(3) the maintenance message: DU PFD FO(2WT2)

replace the PFD-F/O [2WT2] AMM 31-63-22-000-001 and AMM 31-63-22-400-001

(4) the maintenance message: DU PFD CAPT(2WT1)/DMC3(1WT3)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-973)

(5) the maintenance message: DU PFD FO(2WT2)/DMC3(1WT3)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-974)

(6) the maintenance message: DU PFD FO(2WT2)/DMC3(1WT3)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-974)

(7) the maintenance message: EEC(E1-4000KS)BUS EEC1A/DMC3(1WT3)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-890)

(8) the maintenance message: EEC(E1-4000KS)BUS EEC1B/DMC3(1WT3)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-891)

(9) the maintenance message: EEC(E2-4000KS)BUS EEC2A/DMC3(1WT3)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-892)

(10) the maintenance message: EEC(E2-4000KS)BUS EEC2B/DMC3(1WT3)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-893)

(11) the maintenance message: EEC(E1-4000KS)/DMC3(1WT3)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-924)

(12) the maintenance message: EEC(E2-4000KS)/DMC3(1WT3)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-927)

Subtask 31-63-81-810-264-A ** ON A/C NOT FOR ALL

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

replace the DMC-2 [1WT2] AMM 31-63-34-000-001 and AMM 31-63-34-400-001

(2) the maintenance message: DU PFD FO(2WT2)

replace the PFD-F/O [2WT2] AMM 31-63-22-000-001 and AMM 31-63-22-400-001

(3) the maintenance message: DU PFD FO(2WT2)/DMC2(1WT2)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-968)

(4) the maintenance message: EEC(E1-4000KS)BUS EEC1A/DMC2(1WT2)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-882)

(5) the maintenance message: EEC(E1-4000KS)BUS EEC1B/DMC2(1WT2)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-883)

(6) the maintenance message: EEC(E2-4000KS)BUS EEC2A/DMC2(1WT2)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-884)

(7) the maintenance message: EEC(E2-4000KS)BUS EEC2B/DMC2(1WT2)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-885)

(8) the maintenance message: EEC(E1-4000KS)/DMC2(1WT2)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-923)

(9) the maintenance message: EEC(E2-4000KS)/DMC2(1WT2)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-926)

Subtask 31-63-81-810-266-A ** ON A/C NOT FOR ALL

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

replace the PFD-CAPT [2WT1] AMM 31-63-22-000-001 and AMM 31-63-22-400-001

(2) the maintenance message: DU PFD CAPT(2WT1)/DMC1(1WT1)

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

(3) the maintenance message: DU EWD(4WT1)/DMC1(1WT1)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-964)

(4) the maintenance message: EEC(E1-4000KS)BUS EEC1A/DMC1(1WT1)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-874)

(5) the maintenance message: EEC(E1-4000KS)BUS EEC1B/DMC1(1WT1)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-875)

(6) the maintenance message: EEC(E2-4000KS)BUS EEC2A/DMC1(1WT1)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-876)

(7) the maintenance message: EEC(E2-4000KS)BUS EEC2B/DMC1(1WT1)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-00-810-877)

(8) the maintenance message: EEC(E1-4000KS)/DMC1(1WT12)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-922)

(9) the maintenance message: EEC(E2-4000KS)/DMC1(1WT1)

do the relative fault isolation procedure (Ref. TSM TASK 31-63-81-810-925)

Subtask 31-63-81-860-088-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 04:31:11 UTC