DOC AIRBUS | TSM A320FLoss of the REV Indication in the Thrust Reverser Deployed Position on Engine 2
TASK 78-00-00-810-804-A
Loss of the REV Indication in the Thrust Reverser Deployed Position on Engine 2
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 78-00-00-710-056-A ** ON A/C NOT FOR ALL Subtask 78-00-00-710-056-B ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 78-00-00-810-054-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:37:58 UTC
Loss of the REV Indication in the Thrust Reverser Deployed Position on Engine 2
1. Possible Causes
- aircraft wiring
- RELAY-THRUST REV INHIBITION, ENG 2 [14KS2]
HCU-THRUST REV (4101KS)
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ASM 732516 | |
| AMM 78-30-00-040-040 | Deactivation of the Thrust Reverser System |
| 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 78-31-51-000-040 | Removal of the Hydraulic Control Unit |
| AMM 78-31-51-000-042 | Removal of the Hydraulic Control Unit |
| AMM 78-31-51-400-040 | Installation of the Hydraulic Control Unit |
| AMM 78-31-51-400-042 | Installation of the Hydraulic Control Unit |
Subtask 78-00-00-710-056-A ** ON A/C NOT FOR ALL Subtask 78-00-00-710-056-B ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 78-00-00-810-054-A ** ON A/C NOT FOR ALL
A. If the system confirms the fault:
(a) Do a check and repair the aircraft wiring between:
Subtask 78-00-00-810-054-B ** ON A/C NOT FOR ALL - do a check to make sure that the thrust reverser is not inhibited AMM 78-30-00-040-040.
(a) Do a check and repair the aircraft wiring between:
- the throttle control unit (8KS2)/ECU (4000KS)/HCU (4101KS) and
- the throttle control unit (8KS2)/SEC (1CE1) (1CE3)/EIU 2 (1KS2)/thrust reverser inhibition relay (14KS2) ASM 732516.
- do a check to make sure that there is a hydraulic pressure supply from the aircraft.
- replace the RELAY-THRUST REV INHIBITION, ENG 2 [14KS2] .
- replace the
HCU-THRUST REV (4101KS) AMM 78-31-51-000-040 and AMM 78-31-51-400-040.
A. If the system confirms the fault:
(a) Do a check and repair the aircraft wiring between:
Subtask 78-00-00-710-057-A ** ON A/C NOT FOR ALL - do a check to make sure that the thrust reverser is not inhibited AMM 78-30-00-040-040.
(a) Do a check and repair the aircraft wiring between:
- the throttle control unit (8KS2)/ECU (4000KS)/HCU (4101KS) and
- the throttle control unit (8KS2)/SEC (1CE1) (1CE3)/EIU 2 (1KS2)/thrust reverser inhibition relay (14KS2) ASM 732516.
- do a check to make sure that there is a hydraulic pressure supply from the aircraft.
- replace the RELAY-THRUST REV INHIBITION, ENG 2 [14KS2] .
- replace the
HCU-THRUST REV (4101KS) AMM 78-31-51-000-042 and AMM 78-31-51-400-042.
B. Do the test given in Para. 3.A.