W DOC AIRBUS | AMM A320F

Installation of the Pressure Service Check-Valve

TASK 36-11-56-400-001-A
Installation of the Pressure Service Check-Valve

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
FIN: 7270HM
FIN: 7272HM
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 3M (10 FT)- ADJUSTABLE
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 3.3 and 3 m.daN (24.34 and 22.12 lbf.ft ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.03QDB1)
Dry lubricant-Anti Seizing PTFE Loaded -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
191BB, 192FB
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
3
O-RING
AIPC 36-11-03-06-150
3
O-RING
AIPC 36-11-83-01-020
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 12-33-21-618-001-A
Pre-conditioning through the LP Ground Connection (Aircraft Electrical Power Available)
TASK 12-33-21-618-001-A-01
Pre-conditioning through the HP Ground Connection
TASK 12-33-21-618-001-A-02
Pre-conditioning with the APU
TASK 12-33-21-618-001-A-03
Pre-conditioning through the LP Ground Connection (Aircraft Electrical Power Not Available)
F Pressure Service Check-Valve 7270HM, 7272HM
3. Job Set-up
Subtask 36-11-56-860-051-A
A. Aircraft Maintenance Configuration
   (1) Make sure that the WARNING NOTICE(S) are in position:
  • in the cockpit on the Engine Control Panel 115VU to tell persons not to start the engine(s)
  • in the cockpit on the AIR COND Overhead Control Panel 30VU to tell persons not to push in the APU BLEED pushbutton switch
  • on the HP ground connector to tell persons not to pressurize the pneumatic system.
   (2) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below zone 190.
Subtask 36-11-56-865-051-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
** ON A/C ALL
49VUAIR BLEED/X FEED/VALVE/BAT2HVD13
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 2/MONG3HA2D12
49VUAIR BLEED/ENG 1/CTL2HA1D11
** ON A/C NOT FOR ALL
122VUAIR BLEED/ENG 2/CTL3HA2Z23
122VUAIR BLEED/ENG 2/MONG2HA2Z22
** ON A/C ALL
122VUAIR BLEED/X FEED VALVE/NORM1HVZ20
** ON A/C NOT FOR ALL
122VUAIR BLEED/ENG 1/MONG3HA1Z23
122VUAIR BLEED/ENG 2/CTL2HA2Z22
4. Procedure
Subtask 36-11-56-420-050-A
A. Installation of the Pressure Service Check-Valve
   (1) Remove the blanking caps from the union (1) of the elbow (5) and the connector (4).
   (2) Make sure that the threads of these parts are clean and in the correct condition:
  • the union (1) of the elbow (5)
  • the pressure service check-valve (2)
  • the connector (4).
   (3) Apply a small quantity of the Dry lubricant-Anti Seizing PTFE Loaded - (Material No.03QDB1) to the threads of the pressure service check-valve (2).
   (4) Put the pressure service check-valve (2) with the new AIPC 36-11-03-06-150 O-RING (3) or AIPC 36-11-83-01-020 O-RING (3) in their installation positions in the connector (4).
   (5) TORQUE the pressure service check-valve (2) to between 3.3 and 3 m.daN (24.34 and 22.12 lbf.ft ) T.
   (6) Put the elbow (5) in its installation position on the pressure service check-valve (2).
   (7) TORQUE the union (1) of the elbow (5) to between 3.3 and 3 m.daN (24.34 and 22.12 lbf.ft ) T.
Subtask 36-11-56-865-052-A
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
** ON A/C ALL
49VUAIR BLEED/X FEED/VALVE/BAT2HVD13
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 2/MONG3HA2D12
49VUAIR BLEED/ENG 1/CTL2HA1D11
** ON A/C NOT FOR ALL
122VUAIR BLEED/ENG 2/CTL3HA2Z23
122VUAIR BLEED/ENG 2/MONG2HA2Z22
** ON A/C ALL
122VUAIR BLEED/X FEED VALVE/NORM1HVZ20
** ON A/C NOT FOR ALL
122VUAIR BLEED/ENG 1/MONG3HA1Z23
122VUAIR BLEED/ENG 2/CTL2HA2Z22
Subtask 36-11-56-710-050-A
C. Test
   (1) Do the ground air pre-conditioning with the HP Ground Connection (Ref. AMM TASK 12-33-21-618-001), or with the APU (Ref. AMM TASK 12-33-21-618-001).
   (2) Make sure that there are no leaks at the connections.
5. Close-up
Subtask 36-11-56-410-050-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the access panel 191BB or 192FB.
Subtask 36-11-56-860-052-A
B. Put the aircraft back to its initial configuration.
   (1) Remove the access platform(s).
   (2) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 01:14:02 UTC
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