DOC AIRBUS | AMM A320FCold Weather Conditions - Maintenance of the Oxygen System
TASK 12-31-35-660-001-A
Cold Weather Conditions - Maintenance of the Oxygen System
This procedure gives the cold weather maintenance practices for the oxygen system.
2. Job Set-up Information
A. Consumable Materials
B. Referenced Information
3. Job Set-up
Subtask 12-31-35-941-050-A
Subtask 12-31-35-660-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 04:22:18 UTC
Cold Weather Conditions - Maintenance of the Oxygen System
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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobThis procedure gives the cold weather maintenance practices for the oxygen system.
2. Job Set-up Information
A. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14CCB6) | Testing Medium-Leak Detection - Oxygen System |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-14-35-600-001-A | Servicing of the Oxygen-Replenishing |
| 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) |
| TASK 35-11-41-000-001-A | Removal of the Crew Oxygen-Storage Cylinder |
| TASK 35-11-41-000-802-A | Removal of the Crew Oxygen-Storage Cylinders |
| TASK 35-11-41-400-001-A | Installation of the Crew Oxygen-Storage Cylinder |
| TASK 35-11-41-400-802-A | Installation of the Crew Oxygen-Storage Cylinders |
Subtask 12-31-35-941-050-A
A. Not Applicable
4. ProcedureSubtask 12-31-35-660-050-A ** ON A/C NOT FOR ALL
A. Replacement of Crew Oxygen-Storage Cylinder(s) (Ref. AMM TASK 35-11-41-000-001) (Ref. AMM TASK 35-11-41-400-001).
Subtask 12-31-35-660-050-B ** ON A/C NOT FOR ALL NOTE: When you replace the crew oxygen-storage cylinder(s), you must obey the crew-oxygen-storage cylinder removal/installation procedures.
(1) If you replace the oxygen storage cylinder(s) of the crew oxygen system when the ambient temperature is -15 deg.C (5.00 deg.F) or less : - Make sure that the temperature in the oxygen cylinder compartment is more than -15 deg.C (5.00 deg.F). If this temperature is -15 deg.C (5.00 deg.F) or less, the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) used to do the leak test will freeze.
NOTE: We recommend to replace the crew oxygen-storage cylinder after a flight but before the compartment temperature is -15 deg.C (5.00 deg.F), or you can do this task while you pre-condition the aircraft on the ground (Ref. AMM TASK 12-33-21-618-001).
A. Replacement of Crew Oxygen-Storage Cylinder(s) (Ref. AMM TASK 35-11-41-000-802) (Ref. AMM TASK 35-11-41-400-802).
Subtask 12-31-35-660-051-A NOTE: When you replace the crew oxygen-storage cylinder(s), you must obey the crew-oxygen-storage cylinder removal/installation procedures.
(1) If you replace the oxygen storage cylinder(s) of the crew oxygen system when the ambient temperature is -15 deg.C (5.00 deg.F) or less: - Make sure that the temperature in the oxygen cylinder compartment is more than -15 deg.C (5.00 deg.F). If this temperature is -15 deg.C (5.00 deg.F) or less, the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) used to do the leak test will freeze.
NOTE: We recommend to replace the crew oxygen-storage cylinder after a flight but before the compartment temperature is -15 deg.C (5.00 deg.F), or you can do this task while you pre-condition the aircraft on the ground (Ref. AMM TASK 12-33-21-618-001).
B. Replenishment of Crew Oxygen-Storage Cylinder(s) (Ref. AMM TASK 12-14-35-600-001).
(2) We recommend to fill the crew oxygen-storage cylinder before the temperature in the oxygen cylinder compartment is -15 deg.C (5.00 deg.F) but only after:
NOTE: When you fill the crew oxygen-storage cylinder(s), you must obey the oxygen-cylinder replenishment procedure.
NOTE: The maximum charging pressure of the crew oxygen-storage cylinder changes with the ambient temperature
(1) Make sure that the pressure at which you pressurize the crew oxygen-storage cylinder is not more than the maximum charging pressure. (2) We recommend to fill the crew oxygen-storage cylinder before the temperature in the oxygen cylinder compartment is -15 deg.C (5.00 deg.F) but only after:
- The aircraft network is de-energized.
- The aircraft and equipment are grounded.