W DOC AIRBUS | AMM A320F

Reactivation of the Vent Valve

TASK 28-28-00-440-003-A
Reactivation of the Vent Valve

WARNING: OBEY THE FUEL SAFETY PROCEDURES.
FIN: 167QM1 ** ON A/C NOT FOR ALL
FIN: 167QM2 ** ON A/C NOT FOR ALL
1. Reason for the Job
MMEL 28-28-06A
ACT VENT VALVE
MMEL 28-28-06D
ACT VENT VALVE
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT)
No specific
AR
BRIDGE-WIRE
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
TIE WRAP(S)
No specific
1
WARNING NOTICE(S)
T720521
AR
TOOL-VALVE LOCKING
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
252BG
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 24-42-00-861-001-A
Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A
De-energize the Ground Service Network Supplied from the External Power
TASK 28-00-00-910-001-A
Fuel Safety Procedures
TASK 28-11-49-000-001-A
Removal of the ACT Integrated Impact Wall
TASK 28-11-49-400-001-A
Installation of the ACT Integrated Impact Wall
TASK 28-28-35-000-001-A
Removal of the ACT Vent Shut-off Valve
TASK 28-28-35-400-001-A
Installation of the ACT Vent Shut-off Valve
TASK 28-28-55-400-001-A
Installation of the ACT Vent Shut-off Valve Actuator
TASK 52-30-00-860-001-A
Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A
Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 53-42-12-000-001-A
Removal of the Cabin Floor Panels from FR47 thru FR64
TSM 28-28-00-810-836
Fuel - ACT Pressure is Incorrectly Released through the ACT Vent System
TSM 28-28-00-810-839
Fuel - ACT Auto Transfer System - Pressurization Fault
F ACT Vent Valve 167QM
3. Job Set-up
Subtask 28-28-00-860-081-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
   (2) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
   (3) Put a WARNING NOTICE(S) in position:
  • On the APU section of the overhead panel 25VU, to tell persons not to operate the APU/MASTER SW pushbutton switch.
  • On the refuel/defuel control panel 801VU.
  • On the FUEL section of the panel 40VU, to tell persons not to operate the fuel system.
  • On the ENG/APU FIRE panel located on the overhead panel 20VU, to tell persons not to operate the fire extinguishing system.
Subtask 28-28-00-010-056-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
   (2) Put an ACCESS PLATFORM 2M (6 FT) in position at the aft cargo door opening.
   (3) Loosen the quick-release fasteners to remove the right Integrated Impact Wall (Ref. AMM TASK 28-11-49-000-001).
Subtask 28-28-00-010-056-C ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
   (2) Put an ACCESS PLATFORM 2M (6 FT) in position at the aft cargo door opening.
   (3) Remove the right Integrated Impact Wall (Ref. AMM TASK 28-11-49-000-001) to get access to the ACT2.
   (4) Remove the cabin floor panel 252BG (Ref. AMM TASK 53-42-12-000-001) to get access to the ACT1.
   (5) Remove the applicable access panel from the ceiling of the cargo-compartment.
Subtask 28-28-00-865-064-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUACT1/REFUEL & SPLY33QUL29
121VUACT1/CTL & SPLY9QHP29
4. Procedure
Subtask 28-28-00-440-052-A ** ON A/C NOT FOR ALL
A. Reactivation of the Vent Valve
   (1) Remove the T720521 TOOL-VALVE LOCKING (32) from the vent valve (28):
     (a) Loosen the screw (27) and disconnect the V-clamp (26) from the locking tool (32).
     (b) Remove the locking tool (32) from the V-flange of the vent valve (28).
   (2) Remove and discard the TIE WRAP(S) to disconnect the electrical connector (23) from the electrical harness.
   (3) Remove the CAP-BLANKING from each electrical connector and receptacle.
   (4) Remove the BRIDGE-WIRE (shunt) from the electrical connector (23).
   (5) Do an inspection of the component interfaces and the adjacent area.
   (6) Make sure that all the electrical connections are clean and in the correct condition.
   (7) If the removed actuator (25) of the vent valve (28) is unserviceable, replace the ACT Vent Shut-off Valve Actuator (Ref. AMM TASK 28-28-55-400-001).
   (8) If the vent valve (28) has a failure in the open position, replace the ACT Vent Shut-off Valve (Ref. AMM TASK 28-28-35-000-001) (Ref. AMM TASK 28-28-35-400-001).
   (9) If the fault continues:
Subtask 28-28-00-440-052-B ** ON A/C NOT FOR ALL
A. Reactivation of the Vent Valve
NOTE: The subsequent procedure is the same for each installed ACT. Therefore only one procedure is given. Differences between each ACT are given where applicable.
   (1) Remove the T720521 TOOL-VALVE LOCKING (32) from the vent valve (28):
     (a) Loosen the screw (27) and disconnect the V-clamp (26) from the locking tool (32).
     (b) Remove the locking tool (32) from the V-flange of the vent valve (28).
   (2) Remove and discard the TIE WRAP(S) to disconnect the electrical connector (23) from the attached electrical harness.
   (3) Remove the CAP-BLANKING from each electrical connector and receptacle.
   (4) Remove the BRIDGE-WIRE (shunt) from the electrical connector (23).
   (5) Do an inspection of the component interfaces and the adjacent area.
   (6) Make sure that all the electrical connections are clean and in the correct condition.
   (7) If the removed actuator (25) of the vent valve (28) is unserviceable, replace the ACT Vent Shut-off Valve Actuator (Ref. AMM TASK 28-28-55-400-001).
   (8) If the vent valve (28) has a failure in the open position, replace the ACT Vent Shut-off Valve (Ref. AMM TASK 28-28-35-000-001) (Ref. AMM TASK 28-28-35-400-001).
   (9) If the fault continues:
5. Close-up
Subtask 28-28-00-865-065-A ** ON A/C NOT FOR ALL
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUACT1/REFUEL & SPLY33QUL29
121VUACT1/CTL & SPLY9QHP29
Subtask 28-28-00-860-082-A ** ON A/C NOT FOR ALL
B. Put the aircraft back to the serviceable condition.
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the right Integrated Impact Wall (Ref. AMM TASK 28-11-49-400-001).
   (3) Remove the access platform(s).
   (4) Close the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
   (5) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
   (6) Remove the WARNING NOTICE(S).
   (7) Close the applicable entry in the aircraft technical log book.
Subtask 28-28-00-860-082-C ** ON A/C NOT FOR ALL
B. Put the aircraft back to the serviceable condition.
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the access panel in the ceiling of the cargo compartment.
   (3) Install the cabin floor panel 252BG (Ref. AMM TASK 53-42-12-000-001).
   (4) Install the right Integrated Impact Wall (Ref. AMM TASK 28-11-49-400-001).
   (5) Remove the access platform(s).
   (6) Close the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
   (7) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
   (8) Remove the WARNING NOTICE(S).
   (9) Close the applicable entry in the aircraft technical log book.
[Rev.10 from 2021] 2026.04.02 06:17:49 UTC
"WTRUIB" 2025