W DOC AIRBUS | AMM A320F

Removal of the Oxygen-System Test Ports

TASK 35-13-41-000-802-A
Removal of the Oxygen-System Test Ports

WARNING: DO NOT FILL OR REPLACE A CREW OXYGEN CYLINDER OR REPLACE A VALVE ASSEMBLY ON THE CREW OXYGEN SYSTEM WHEN YOU FUEL OR DEFUEL THE AIRCRAFT. KEEP ALL HYDROCARBONS (FUELS, LUBRICANTS, ETC.) AWAY FROM ALL SOURCES OF OXYGEN. OXYGEN BECOMES EXPLOSIVE WHEN IT TOUCHES HYDROCARBONS.
WARNING: CLEAN THE TOOLS AND MAKE SURE YOUR HANDS ARE CLEAN TO PREVENT CONTAMINATION OF THE OXYGEN SYSTEM.
CAUTION: BE VERY CAREFUL WHEN YOU DO WORK ON OR NEAR THE AIR-CONDITIONING DUCTS. THE DUCTS ARE MADE OF THIN MATERIAL AND YOU CAN EASILY BREAK THEM.
CAUTION: PUT DRY AND CLEAN METAL OR PLASTIC PLUGS ON ALL PIPES OR UNITS THAT YOU REMOVE TEMPORARILY. THEN PUT EACH PIPE OR UNIT IN A SEALED VINYL BAG. IF YOU DO NOT OBEY THESE INSTRUCTIONS, CONTAMINATION OF THE OXYGEN SYSTEM CAN OCCUR.
ZONE: 123
ZONE: 210
FIN: 5755HM1 ** ON A/C NOT FOR ALL
FIN: 5755HM2 ** 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)
No specific
AR
BAG - VINYL
No specific
AR
BAG - VINYL, SEALED
No specific
AR
CAP - BLANKING
No specific
AR
PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
123
NOSE GEAR WELL
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
812
 C. Referenced Information
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 35-00-00-860-001-A
Special Precautions When Working on a Gaseous Oxygen System
TASK 35-10-00-870-801-A
Depressurization of the Crew Oxygen System (Manual Shutoff Valve(s) of the Crew Oxygen-Storage Cylinder(s) is (are) Closed)
TASK 52-41-00-010-002-A
Open the Avionics Compartment Doors for Access
F Oxygen Test Ports
3. Job Set-up
Subtask 35-13-41-860-053-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
WARNING: WHEN YOU DO WORK ON THE GASEOUS OXYGEN SYSTEM, MAKE SURE THAT YOU OBEY ALL THE APPLICABLE SAFETY PRECAUTIONS. IF YOU DO NOT OBEY THESE PRECAUTIONS, INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT CAN OCCUR.
   (1) Obey the special precautions when you do work on a gaseous oxygen system (Ref. AMM TASK 35-00-00-860-001).
   (2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 35-13-41-010-051-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Put the ACCESS PLATFORM 2M (6 FT) in position at access door 812.
   (2) Open access door 812 (Ref. AMM TASK 52-41-00-010-002).
   (3) Get access to the avionics compartment.
   (4) Fully close the manual shutoff valves of the crew oxygen-storage cylinders (5750HM1 and 5750HM2).
   (5) Put a WARNING NOTICE(S) in position to tell persons not to open the manual shutoff valves of the crew oxygen-storage cylinders (5750HM1 and 5750HM2).
Subtask 35-13-41-870-051-A ** ON A/C NOT FOR ALL
C. Bleeding of the Crew Oxygen System
   (1) Release the pressure from the crew oxygen system (Ref. AMM TASK 35-10-00-870-801).
   (2) In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU:
  • Put a WARNING NOTICE(S) in position to tell persons not to push the CREW SUPPLY pushbutton switch.
Subtask 35-13-41-865-053-A ** ON A/C NOT FOR ALL
D. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUOXYGEN/CREW/OXY/SPLY1HTHA01
4. Procedure
Subtask 35-13-41-020-051-A ** ON A/C NOT FOR ALL
A. Removal of Oxygen-System Test Port 5755HM1(5755HM2)
CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT EQUIPMENT FROM FLEXIBLE HOSES AND RIGID TUBING. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL CAUSE DAMAGE TO THE HOSES AND TUBES.
   (1) Loosen the nut (4).
   (2) Remove the screws (1) and nuts (2).
   (3) Disconnect the pipe (3) from the test port (5).
   (4) Remove the test port (5).
   (5) Put a PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN on the disconnected pipe (3).
   (6) Put a BAG - VINYL on the disconnected pipe (3).
   (7) Put a CAP - BLANKING on the disconnected port of the test port (5).
   (8) Put the test port (5) in a BAG - VINYL, SEALED.
[Rev.10 from 2021] 2026.04.01 01:04:43 UTC
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