W DOC AIRBUS | AMM A320F

Removal of the Outflow Valve (From Outside)

TASK 21-31-51-000-006-A
Removal of the Outflow Valve (From Outside)

WARNING: MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
FIN: 10HL ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 1M(3 FT)
No specific
1
ACCESS PLATFORM 2M (6 FT)
No specific
1
ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific
AR
BOOMSET 600 OHMS
No specific
AR
CAP - BLANKING
No specific
AR
HEADSET 600 OHMS
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
 B. Referenced Information
REFERENCE
DESIGNATION
TASK 23-44-00-700-001-A
Operational Test of the Service Interphone
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)
F Outflow Valve 10HL ** ON A/C NOT FOR ALL
F Outflow Valve 10HL ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 21-31-51-861-050-A ** ON A/C NOT FOR ALL
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 21-31-51-865-065-A ** ON A/C NOT FOR ALL
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/CAB/PRESS/CTL11HLD09
122VUAIR COND/AFT CARGO VENT/FAN30HNS22
122VUAIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/SPLY6HUU19
122VUAIR COND/CAB PRESS/CTL/MAN3HLY23
122VUAIR COND/CAB PRESS/CTL/22HLY22
Subtask 21-31-51-010-062-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 1M(3 FT) in position at the avionics access door 824 in Zone 126.
WARNING: OPEN THE ACCESS DOOR AND MAKE SURE IT STAYS OPEN. ATTACH A WARNING NOTICE TO THE ACCESS DOOR TO TELL PERSONS NOT TO CLOSE IT. THIS IS TO PREVENT ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT BY THE AIR CONDITIONING SYSTEM IF ALL THE OTHER CABIN OPENINGS ARE CLOSED. PRESSURIZATION OF THE AIRCRAFT CAN BE DANGEROUS. IT CAN CAUSE A DOOR TO OPEN WITH EXPLOSIVE FORCE WHICH CAN CAUSE INJURY AND/OR DAMAGE.
   (2) Open the avionics access door 824.
   (3) Put the ACCESS PLATFORM 2M (6 FT) in position below the outflow valve, in zone 172.
   (4) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the access panel 312AR.
   (5) Remove the access panel 312AR.
Subtask 21-31-51-869-050-A ** ON A/C NOT FOR ALL
D. Energize the service interphone system (Ref. AMM TASK 23-44-00-700-001).
4. Procedure
Subtask 21-31-51-020-061-A ** ON A/C NOT FOR ALL
A. Preparation for Removal of the Outflow Valve
NOTE: The outflow valve must be in the open position for this part of the procedure.
   (1) Through the open outflow valve:
     (a) Disconnect the electrical connectors (1) 10HL-B, (3) 10HL-A, (23) 10HL-E and (26) 10HL-D.
     (b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
     (c) Bonding strap removal:
       1 Remove the nut (29), the bolt (27), the washers (28) and disconnect the bonding strap (4).
NOTE: This step is only applicable for outflow valves P/N 9023-15703-81 and previous.
       2 Remove the bolt (27), the washer (28) and disconnect the bonding strap (4).
NOTE: This step is only applicable for outflow valves P/N 20790-01AA and subsequent.
     (d) Remove the bolts (22), the washers (21) and (where installed) the washers (24).
Subtask 21-31-51-865-113-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
122VUAIR COND/CAB PRESS/CTL/MAN3HLY23
Subtask 21-31-51-860-050-A ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE OUTFLOW VALVES ARE CLEAR. MOVEMENT OF THE OUTFLOW VALVES CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
   (1) Close the outflow valve from the cockpit:
NOTE: For this procedure we recommend that a minimum of two persons are in constant contact with each other through the service interphone system. One person must operate the outflow valve from the cockpit, the other must be at the outflow valve.
     (a) In the zone 312, connect the BOOMSET 600 OHMS to the service interphone jack 13RJ.
     (b) In the cockpit:
  • on the CAPT jack panel, connect the HEADSET 600 OHMS to the related connector,
  • on the overhead panel 50VU make sure that the ON legend on the SVCE INT OVRD pushbutton switch is off,
  • on the CABIN PRESS panel 25VU make sure that the MODE SEL pushbutton switch is in the MAN position and,
  • on the CABIN PRESS panel 25VU set the MAN V/S CTL toggle switch to the DN position to close the outflow valve.
Subtask 21-31-51-865-067-A ** ON A/C NOT FOR ALL
D. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
122VUAIR COND/CAB PRESS/CTL/MAN3HLY23
Subtask 21-31-51-020-057-A ** ON A/C NOT FOR ALL
E. Removal of the Outflow Valve
WARNING: SUPPORT THE UNIT/ASSEMBLY. THE UNIT/ASSEMBLY IS HEAVY. IF YOU DO NOT SUPPORT IT, IT WILL FALL. THIS CAN CAUSE INJURY TO PERSONS, AND/OR DAMAGE TO EQUIPMENT.
   (1) Remove the screws (7).
     (a) Identify the screws for the installation procedure.
   (2) Carefully lift the outflow valve (5) and move it to one side to get access to the electrical connector (2) 10HL-C.
   (3) Disconnect the electrical connector (2) 10HL-C.
   (4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
   (5) Lift and carefully remove the outflow valve (5) through the hole in the aircraft skin.
NOTE: The outflow valve weighs approx. 12.5 kg (27.5578 lb).
     (a) Prevent damage to the gasket (6) and keep the location pins (8) with the outflow valve (5).
[Rev.10 from 2021] 2026.04.02 06:11:15 UTC
"WTRUIB" 2025