W DOC AIRBUS | AMM A320F

Installation of the Pressure Switch

TASK 38-42-16-400-001-A
Installation of the Pressure Switch

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
FIN: 10MD ** 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 2M (6 FT)
 B. Consumable Materials
REFERENCE
DESIGNATION
No specific
inflation-deflation adaptor kit (50/psi)
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
131NW, 132PW, 161DW, 162DW
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
2
NUT
AIPC 38-42-04-11-170
3
PIN
AIPC 38-42-04-11-180
2
NUT
AIPC 38-42-84-10-310
3
PIN
AIPC 38-42-84-10-320
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 12-15-38-613-001-A
Fill the Potable Water Tank System (Aircraft Electrical Power Available)
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 25-54-12-000-001-A
Removal of the Forward Cargo-Compartment Partition
TASK 38-10-00-614-002-A
Depressurization of the Potable Water System
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
F Pressure Switch 10MD
3. Job Set-up
Subtask 38-42-16-860-053-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
   (2) Make sure that the potable water system is depressurized (Ref. AMM TASK 38-10-00-614-002).
   (3) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.
   (4) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position.
   (5) Make sure that the FWD cargo-compartment door is open and safetied (Ref. AMM TASK 52-30-00-860-001).
   (6) Make sure that access panels 131NW, 132PW are removed (Ref. AMM TASK 25-54-12-000-001).
Subtask 38-42-16-865-051-A ** ON A/C NOT FOR ALL
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
2001VUWATER SYS-AIR-COMPRESSOR19MDF01
4. Procedure
WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
Subtask 38-42-16-560-050-A ** ON A/C NOT FOR ALL
A. Preparation for Installation
   (1) Make sure that the parts retained from the removed component are clean and in the correct condition.
   (2) Clean the component interfaces and the adjacent area.
   (3) Do an inspection of the component interfaces and the adjacent area.
   (4) Remove the blanking plug from the pressure switch (4).
   (5) Install the new AIPC 38-42-04-11-170 NUT (2) or AIPC 38-42-84-10-310 NUT (2) on the pressure switch (4) and install a new AIPC 38-42-04-11-180 PIN (3) or AIPC 38-42-84-10-320 PIN (3) in the nut (2).
   (6) Remove the blanking plug from the union (1).
Subtask 38-42-16-420-050-A ** ON A/C NOT FOR ALL
B. Installation of the Pressure Switch 10MD
   (1) Remove the PLUG-BLANKING from each disconnected line end.
   (2) Clean the component interfaces and the adjacent area.
   (3) Do an inspection of the component interfaces and the adjacent area.
   (4) Install the pressure switch (3) on the union (1).
   (5) Tighten the union nut (2) of the pressure switch (3).
   (6) Remove the CAP-BLANKING from each electrical connector and receptacle.
   (7) Make sure that all the electrical connections are clean and in the correct condition.
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
   (8) Connect the electrical connector (4) to the pressure switch (3).
   (9) Remove the WARNING NOTICE(S).
Subtask 38-42-16-860-052-A ** ON A/C NOT FOR ALL
C. Preparation for Test
   (1) Remove the cap (6) from the test connection.
   (2) Connect an inflation-deflation adaptor kit (50/psi) to the test connection.
   (3) Fill the potable water tank with 50 l (13.2085 USgal) of water (Ref. AMM TASK 12-15-38-613-001).
Subtask 38-42-16-865-054-A ** ON A/C NOT FOR ALL
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
2001VUWATER SYS-AIR-COMPRESSOR19MDF01
Subtask 38-42-16-720-050-C ** ON A/C NOT FOR ALL
E. Do this test.
ACTION
RESULT
1.At service panel 171AL:
  • open the service panel 171AL and then push and hold the door limit switch 5MA.
In the air system:
  • the compressor 8MD starts to operate.
  • the air pressure increases.
NOTE: The pressure gage of the adaptor kit shows the pressure in the tank.

2.In the air system:
  • the pressure in the tank is 28 psi (1.9305 bar).
In the air system:
  • the compressor 8MD stops.
3.In a lavatory:
  • operate a water faucet.
In the lavatory:
  • water flows into the washbasin.

In the air system:
  • the pressure decreases.
  • when the pressure reaches 25 psi (1.7237 bar) the compressor 8MD operates.
5. Close-up
Subtask 38-42-16-480-050-A ** ON A/C NOT FOR ALL
A. Removal of the Test Equipment
F Pressure Switch 10MD ** ON A/C NOT FOR ALL
NOTE: The pressure in the system is released when you remove the adaptor kit.
   (1) Remove the inflation/deflation adaptor kit and install the cap (6) on the union (1).
Subtask 38-42-16-410-050-A ** ON A/C NOT FOR ALL
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the access panels 161DW 162DW on the aft wall of the AFT cargo compartment.
   (3) Close the AFT cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
   (4) Remove the access platform(s).
Subtask 38-42-16-862-050-A ** ON A/C NOT FOR ALL
C. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:26:01 UTC
"WTRUIB" 2025