DOC AIRBUS | TSM A320FREV Indication Stays Amber on Engine 1 or 2
TASK 78-00-00-810-802-A
REV Indication Stays Amber on Engine 1 or 2
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 78-00-00-710-052-A ** ON A/C NOT FOR ALL
Subtask 78-00-00-810-051-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:37:58 UTC
REV Indication Stays Amber on Engine 1 or 2
1. Possible Causes
- DMC-1 [1WT1]
- LATCH-BLOCKER DOOR, UPPER R [3002KM1]
- LATCH-BLOCKER DOOR, LOWER R [3002KM2]
- LATCH-BLOCKER DOOR, LOWER L [3002KM3]
- LATCH-BLOCKER DOOR, UPPER L [3002KM4]
- lower blocker door
- upper blocker door
- ACTUATOR-BLOCKER DOOR, UPPER R [3001KM1]
- ACTUATOR-BLOCKER DOOR, LOWER R [3001KM2]
- ACTUATOR-BLOCKER DOOR, LOWER L [3001KM3]
- ACTUATOR-BLOCKER DOOR, UPPER L [3001KM4]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 31-63-34-000-001 | Removal of the DMC |
| AMM 31-63-34-400-001 | Installation of the DMC |
| AMM 78-31-00-710-040 | Operational Test of the Thrust Reverser System |
| AMM 78-31-00-710-042 | Operational Test of the Thrust Reverser System |
| AMM 78-31-19-000-001 | Removal of the Blocker Door Latches |
| AMM 78-31-19-000-040 | Removal of the Blocker Door Latches |
| AMM 78-31-19-400-001 | Installation of the Blocker Door Latches |
| AMM 78-31-19-400-040 | Installation of the Blocker Door Latches |
| AMM 78-31-41-000-001 | Removal of the Blocker Door Hydraulic Actuator |
| AMM 78-31-41-000-040 | Removal of the Blocker Door Hydraulic Actuators |
| AMM 78-31-41-400-001 | Installation of the Blocker Door Hydraulic Actuator |
| AMM 78-31-41-400-040 | Installation of the Blocker Door Hydraulic Actuators |
| AMM 78-32-41-000-001 | Removal of the Lower Blocker Door |
| AMM 78-32-41-000-002 | Removal of the Upper Blocker Door |
| AMM 78-32-41-000-040 | Removal of the Lower Blocker Door |
| AMM 78-32-41-000-041 | Removal of the Upper Blocker Door |
| AMM 78-32-41-400-001 | Installation of the Lower Blocker Door |
| AMM 78-32-41-400-002 | Installation of the Upper Blocker Door |
| AMM 78-32-41-400-040 | Installation of the Lower Blocker Door |
| AMM 78-32-41-400-041 | Installation of the Upper Blocker Door |
Subtask 78-00-00-710-052-A ** ON A/C NOT FOR ALL
A. Test
(1) Do a check to see if the REV indication stays amber on the upper ECAM display unit with the DMC3 switched on.
4. Fault Isolation(1) Do a check to see if the REV indication stays amber on the upper ECAM display unit with the DMC3 switched on.
Subtask 78-00-00-810-051-A ** ON A/C NOT FOR ALL
A. If the REV indication does not stay amber on the upper ECAM display unit with the DMC3 switched on:
(1) Replace the DMC-1 [1WT1] AMM 31-63-34-000-001 and AMM 31-63-34-400-001.
Subtask 78-00-00-810-052-A ** ON A/C NOT FOR ALL (1) Replace the DMC-1 [1WT1] AMM 31-63-34-000-001 and AMM 31-63-34-400-001.
B. If the REV indication stays amber on on the upper ECAM display unit with the DMC3 switched on:
(1) Manually unlock the latches to make sure that the blocker doors operate correctly.
(a) If the blocker door does not operate correctly:
Subtask 78-00-00-710-053-A ** ON A/C NOT FOR ALL Subtask 78-00-00-810-052-B ** ON A/C NOT FOR ALL (1) Manually unlock the latches to make sure that the blocker doors operate correctly.
(a) If the blocker door does not operate correctly:
- replace the defective: LATCH-BLOCKER DOOR, UPPER R [3002KM1] or LATCH-BLOCKER DOOR, LOWER R [3002KM2] or LATCH-BLOCKER DOOR, LOWER L [3002KM3] or LATCH-BLOCKER DOOR, UPPER L [3002KM4] AMM 78-31-19-000-040 and AMM 78-31-19-400-040.
- manually release the actuator to make sure that the blocker door or the hydraulic actuator operates correctly.
- replace the defective lower blocker door AMM 78-32-41-000-040 AMM 78-32-41-400-040 or
- replace the defective upper blocker door AMM 78-32-41-000-041 AMM 78-32-41-400-041.
- replace the defective: ACTUATOR-BLOCKER DOOR, UPPER R [3001KM1] or ACTUATOR-BLOCKER DOOR, LOWER R [3001KM2] or ACTUATOR-BLOCKER DOOR, LOWER L [3001KM3] ACTUATOR-BLOCKER DOOR, UPPER L [3001KM4] AMM 78-31-41-000-040 AMM 78-31-41-400-040.
D. If the REV indication stays amber on on the upper ECAM display unit with the DMC3 switched on:
(1) Manually unlock the latches to make sure that the blocker doors operate correctly.
(a) If the blocker door does not operate correctly:
Subtask 78-00-00-710-053-B ** ON A/C NOT FOR ALL (1) Manually unlock the latches to make sure that the blocker doors operate correctly.
(a) If the blocker door does not operate correctly:
- replace the defective: LATCH-BLOCKER DOOR, UPPER R [3002KM1] or LATCH-BLOCKER DOOR, LOWER R [3002KM2] or LATCH-BLOCKER DOOR, LOWER L [3002KM3] or LATCH-BLOCKER DOOR, UPPER L [3002KM4] AMM 78-31-19-000-001 and AMM 78-31-19-400-001.
- manually release the actuator to make sure that the blocker door or the hydraulic actuator operates correctly.
- replace the defective lower blocker door AMM 78-32-41-000-001 AMM 78-32-41-400-001 or
- replace the defective upper blocker door AMM 78-32-41-000-002 AMM 78-32-41-400-002.
- replace the defective: ACTUATOR-BLOCKER DOOR, UPPER R [3001KM1] or ACTUATOR-BLOCKER DOOR, LOWER R [3001KM2] or ACTUATOR-BLOCKER DOOR, LOWER L [3001KM3] ACTUATOR-BLOCKER DOOR, UPPER L [3001KM4] AMM 78-31-41-000-001 AMM 78-31-41-400-001.