DOC AIRBUS | TSM A320FFault of the System Pressure Indication of the Yellow Hydraulic System
TASK 29-13-00-810-816-A
Fault of the System Pressure Indication of the Yellow Hydraulic System
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 29-13-00-710-067-A 4. Fault Isolation
Subtask 29-13-00-810-070-A
[Rev.8 from Aug 2018]
2026.04.04 04:29:27 UTC
Fault of the System Pressure Indication of the Yellow Hydraulic System
1. Possible Causes
- TIME RELAY [3816GX]
- RELAY-TIME [6MJ]
- SYSTEM-PRESS-SW [3151GN]
- RELAY-SCCB PWR SPLY [3811GX]
- wiring
- terminal block 1862VT
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ESPM 2046100 | |
| AMM 22-91-00-710-001 | Ground Scanning of the AFS |
| AMM 29-13-00-710-002 | Operational Test of the Yellow Hydraulic System |
| AWM 293201 | |
| AMM 29-32-12-000-003 | Removal of the System Pressure Switch |
| AMM 29-32-12-400-003 | Installation of the System Pressure Switch |
Subtask 29-13-00-710-067-A 4. Fault Isolation
Subtask 29-13-00-810-070-A
A. If the test gives:
(1) If the ground scanning shows the messages:
(2) If the fault continues:
(a) Do a check of the wiring between:
Subtask 29-13-00-710-068-A - The message HYD Y SYS LO PR on the upper ECAM DU.
- A system pressure indication of 3000 psi on the lower ECAM DU.
- An intermittent PTU indication in amber on the lower ECAM DU.
(1) If the ground scanning shows the messages:
- AFS: HYD 3151GN
- AFS: ELAC
- SFCC 2: WRONG INHIBIT SIGN FROM CARGO DOOR YELLOW SYSTEM
(2) If the fault continues:
- Replace RELAY-TIME [6MJ] .
- Replace SYSTEM-PRESS-SW [3151GN] AMM 29-32-12-000-003 and AMM 29-32-12-400-003.
- Replace RELAY-SCCB PWR SPLY [3811GX] ESPM 2046100.
(a) Do a check of the wiring between:
- SYSTEM-PRESS-SW [3151GN] connector A/C and terminal block 1862VT pin 43/H AWM 293201.
- SYSTEM-PRESS-SW [3151GN] connector A/A and the GND AWM 293201.
B. Do the fault confirmation procedure as given in Para. 3. to make sure that the operation is correct.