DOC AIRBUS | AMM A320FAPU LP VALVE - Reactivation
TASK 28-29-00-440-002-A
APU LP VALVE - Reactivation
MMEL 28-29-01B
APU LP FUEL VALVE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 28-29-00-860-056-A
Subtask 28-29-00-440-050-A
Subtask 28-29-00-410-053-A
[Rev.10 from 2021]
2026.04.02 07:03:50 UTC
APU LP VALVE - Reactivation
FIN: 14QM
1. Reason for the JobMMEL 28-29-01B
APU LP FUEL VALVE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | STEPLADDER 2.0 M (6.6 FT) |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 28-29-51-400-001-A | Installation of the APU Fuel LP Valve Actuator |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
| TSM 28-29-00-810-801 | APU Fuel Supply Failure |
APU LP Fuel Valve and Actuator (P/N B27000).Subtask 28-29-00-860-056-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002)
Subtask 28-29-00-865-060-A (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002)
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 28-29-00-010-052-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | APU/FUEL/LP VALVE/CTL | 1QF | M40 |
| 121VU | APU/FUEL/LP VALVE/SPLY | 2QF | M39 |
C. Get Access
(1) Open the main landing-gear doors Z734, Z744 (Ref. AMM TASK 32-12-00-010-001).
(2) Put the STEPLADDER 2.0 M (6.6 FT) in position at the main landing-gear bay.
4. Procedure(1) Open the main landing-gear doors Z734, Z744 (Ref. AMM TASK 32-12-00-010-001).
(2) Put the STEPLADDER 2.0 M (6.6 FT) in position at the main landing-gear bay.
Subtask 28-29-00-440-050-A
A. Reactivation of the APU LP Shutoff Valve (Actuator P/N B27000)
(1) If the LP-valve actuator was removed to deactivate the LP shutoff valve do the following steps:
(a) Remove the electrical connectors (2) from the locking device (8).
(b) Remove the nuts (3), the washers (4) and the bonding strap (5) from the actuator mount studs (9).
(c) Remove the locking device (8).
(d) Install the APU-fuel LP-valve actuator (1) (Ref. AMM TASK 28-29-51-400-001).
(2) If the LP shutoff valve was deactivated without a removal of the actuator do following steps:
(a) Remove the tie-wraps from the tied back cables/connectors (2).
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Connect the connectors (2) to the actuator.
Subtask 28-29-00-440-051-A (1) If the LP-valve actuator was removed to deactivate the LP shutoff valve do the following steps:
(a) Remove the electrical connectors (2) from the locking device (8).
(b) Remove the nuts (3), the washers (4) and the bonding strap (5) from the actuator mount studs (9).
(c) Remove the locking device (8).
(d) Install the APU-fuel LP-valve actuator (1) (Ref. AMM TASK 28-29-51-400-001).
(2) If the LP shutoff valve was deactivated without a removal of the actuator do following steps:
(a) Remove the tie-wraps from the tied back cables/connectors (2).
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Connect the connectors (2) to the actuator.
B. Reactivation of the APU LP Shutoff Valve (Actuator P/N A08000)
(1) If the LP-valve actuator was removed to deactivate the LP shutoff valve do the following steps:
(a) Remove the tie-wraps (8) from the tied back cables/connectors (4).
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Remove the screw (3) and the bonding strap (2) from the locking cover (5).
(d) Remove the V-Band clamp (6) and the locking cover (5).
(e) Install the APU-fuel LP-valve actuator (1) (Ref. AMM TASK 28-29-51-400-001).
(2) If the LP shutoff valve was deactivated without a removal of the actuator do following steps:
(a) Remove the tie-wraps (8) from the tied back cables/connectors (4).
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Connect the connectors (4) to the actuator.
Subtask 28-29-00-865-059-A (1) If the LP-valve actuator was removed to deactivate the LP shutoff valve do the following steps:
(a) Remove the tie-wraps (8) from the tied back cables/connectors (4).
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Remove the screw (3) and the bonding strap (2) from the locking cover (5).
(d) Remove the V-Band clamp (6) and the locking cover (5).
(e) Install the APU-fuel LP-valve actuator (1) (Ref. AMM TASK 28-29-51-400-001).
(2) If the LP shutoff valve was deactivated without a removal of the actuator do following steps:
(a) Remove the tie-wraps (8) from the tied back cables/connectors (4).
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Connect the connectors (4) to the actuator.
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 28-29-00-810-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | APU/FUEL/LP VALVE/CTL | 1QF | M40 |
| 121VU | APU/FUEL/LP VALVE/SPLY | 2QF | M39 |
D. Trouble Shooting
(1) Trouble shoot the APU LP Fuel Shutoff-Valve TSM 28-29-00-810-801.
(2) Remove the WARNING NOTICE(S).
(3) Make an entry in the logbook that the APU LP Fuel Shutoff-Valve is reactivated.
5. Close-up(1) Trouble shoot the APU LP Fuel Shutoff-Valve TSM 28-29-00-810-801.
(2) Remove the WARNING NOTICE(S).
(3) Make an entry in the logbook that the APU LP Fuel Shutoff-Valve is reactivated.
Subtask 28-29-00-410-053-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the stepladder.
(3) Close the main landing-gear doors Z734, Z744 (Ref. AMM TASK 32-12-00-410-001).
Subtask 28-29-00-860-057-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the stepladder.
(3) Close the main landing-gear doors Z734, Z744 (Ref. AMM TASK 32-12-00-410-001).