DOC AIRBUS | AMM A320FCheck Connecting Hose, Mask and Pressure on Cylinder Pressure Gauge
TASK 35-32-42-210-002-A
Check Connecting Hose, Mask and Pressure on Cylinder Pressure Gauge
Refer to the MPD TASK: 353000-01
CHECK CONNECTING HOSE, MASK AND PRESSURE ON CYLINDER PRESSURE GAUGE.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 35-32-42-860-062-A
Subtask 35-32-42-210-055-A
Subtask 35-32-42-410-057-A
[Rev.10 from 2021]
2026.04.01 04:25:22 UTC
Check Connecting Hose, Mask and Pressure on Cylinder Pressure Gauge
WARNING:
KEEP ALL HYDROCARBONS (FUELS, LUBRICANTS, ETC.) AWAY FROM ALL SOURCE 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:
MAKE SURE THAT YOU OBEY THE MANUFACTURER'S INSTRUCTIONS AND NATIONAL HAZARDOUS MATERIAL REGULATIONS WHEN YOU MOVE OR KEEP THIS EQUIPMENT IN STORAGE:
- CHEMICAL OXYGEN GENERATORS
- PROTECTIVE BREATHING EQUIPMENT
- FIXED AND PORTABLE OXYGEN CYLINDERS.
WARNING:
WHEN YOU MOVE OXYGEN EQUIPMENT OR KEEP IT IN STORAGE, MAKE SURE THAT YOU OBEY:
- THE MANUFACTURER'S INSTRUCTIONS, AND
- ALL NATIONAL HAZARDOUS MATERIAL REGULATIONS RELATED TO FIXED AND PORTABLE OXYGEN CYLINDERS.
ZONE: 200
1. Reason for the JobRefer to the MPD TASK: 353000-01
CHECK CONNECTING HOSE, MASK AND PRESSURE ON CYLINDER PRESSURE GAUGE.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | THERMOMETER 50 DEG C (122 DEG F) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 200 | UPPER HALF FUSELAGE |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 24-42-00-862-001-A | De-energize the Ground Service Network Supplied from the External Power |
| TASK 35-00-00-860-001-A | Special Precautions When Working on a Gaseous Oxygen System |
| TASK 35-32-42-000-001-A | Removal of the Portable Oxygen Cylinder |
| TASK 35-32-42-400-001-A | Installation of the Portable Oxygen Cylinder |
| TASK 35-32-00-00 | CABIN ATTENDANTS PORTABLE DEVICES - DESCRIPTION AND OPERATION |
Cylinder Pressure/Temperature Correction GraphSubtask 35-32-42-860-062-A
A. Aircraft Maintenance Configuration
(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 ground service network
(Ref. AMM TASK 24-42-00-861-001).
Subtask 35-32-42-010-061-A (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 ground service network
(Ref. AMM TASK 24-42-00-861-001).
B. Get Access
(1) For the location of portable oxygen cylinder(s) refer to Para. Component Location (Ref. AMM D/O 35-32-00-00).
(2) If necessary, open the related door(s) to get access to the portable oxygen cylinder(s).
(3) If necessary, remove the portable oxygen cylinder(s) (Ref. AMM TASK 35-32-42-000-001).
4. Procedure(1) For the location of portable oxygen cylinder(s) refer to Para. Component Location (Ref. AMM D/O 35-32-00-00).
(2) If necessary, open the related door(s) to get access to the portable oxygen cylinder(s).
(3) If necessary, remove the portable oxygen cylinder(s) (Ref. AMM TASK 35-32-42-000-001).
Subtask 35-32-42-210-055-A
A. Visual Check of the Masks, the Flexible Hoses and the Pressure Gages of the Portable Oxygen Cylinders
(a) Use the THERMOMETER 50 DEG C (122 DEG F) and measure the temperature near the portable oxygen cylinder.
(b) Read the pressure on the pressure gage.
(c) Calculate the correct pressure value as follows:
1 Select the correct coefficient related to the temperature in the portable oxygen-cylinder area:
2 Calculate the adjusted temperature pressure:
(d) Use one of the tables that follow to calculate the quantity of oxygen necessary for each portable oxygen cylinder:
1 Refer to the table that follows for part number series 5500/5600/9700/9800:
(2) You can ignore the steps that follow if you have an approved procedure to make sure that there is sufficient oxygen available before each flight given by the local airworthiness authorities:
(a) Calculate the total quantity of oxygen in all the portable oxygen cylinders installed in the aircraft.
(b) Make sure that the quantity of the available oxygen obeys the airworthiness instructions for the aircraft configurations.
(3) Carefully remove each connected oxygen mask from the applicable stowage bag.
(4) Make sure that oxygen mask is not disconnected from the related portable oxygen cylinder (Ref. AMM TASK 35-32-42-000-001).
(5) Make sure that:
Subtask 35-32-42-614-053-A NOTE: The related filling-ratio graphs give more information related to the available oxygen in the portable oxygen cylinders.
(1) Calculate the quantity of oxygen necessary for each portable oxygen cylinder as follows: (a) Use the THERMOMETER 50 DEG C (122 DEG F) and measure the temperature near the portable oxygen cylinder.
(b) Read the pressure on the pressure gage.
(c) Calculate the correct pressure value as follows:
1 Select the correct coefficient related to the temperature in the portable oxygen-cylinder area:
| Temperature (deg K) | Temperature (deg F) | Temperature (deg C) | Corrective coefficient |
|---|---|---|---|
| 233.15 | -40 | -40.00 | 0.79 |
| 235.93 | -35 | -37.22 | 0.80 |
| 238.71 | -30 | -34.44 | 0.81 |
| 241.48 | -25 | -31.67 | 0.82 |
| 244.26 | -20 | -28.89 | 0.83 |
| 247.04 | -15 | -26.11 | 0.84 |
| 249.82 | -10 | -23.33 | 0.85 |
| 252.59 | -5 | -20.56 | 0.86 |
| 255.37 | 0 | -17.78 | 0.87 |
| 258.15 | 5 | -15.00 | 0.88 |
| 260.93 | 10 | -12.22 | 0.89 |
| 263.71 | 15 | -9.44 | 0.90 |
| 266.48 | 20 | -6.67 | 0.91 |
| 269.26 | 25 | -3.89 | 0.92 |
| 272.04 | 30 | -1.11 | 0.92 |
| 274.82 | 35 | 1.67 | 0.93 |
| 277.59 | 40 | 4.44 | 0.94 |
| 280.37 | 45 | 7.22 | 0.95 |
| 283.15 | 50 | 10.00 | 0.96 |
| 285.93 | 55 | 12.78 | 0.97 |
| 288.71 | 60 | 15.56 | 0.98 |
| 291.48 | 65 | 18.33 | 0.99 |
| 294.26 | 70 | 21.11 | 1.00 |
| 297.04 | 75 | 23.89 | 1.01 |
| 299.82 | 80 | 26.67 | 1.02 |
| 302.59 | 85 | 29.44 | 1.03 |
| 305.37 | 90 | 32.22 | 1.04 |
| 308.15 | 95 | 35.00 | 1.05 |
| 310.93 | 100 | 37.78 | 1.06 |
| 313.71 | 105 | 40.56 | 1.07 |
| 316.48 | 110 | 43.33 | 1.08 |
| 319.26 | 115 | 46.11 | 1.09 |
| 322.04 | 120 | 48.89 | 1.09 |
| Pressure on the pressure gage |
| Actual pressure=------------------------- |
| Corrective coefficient |
(d) Use one of the tables that follow to calculate the quantity of oxygen necessary for each portable oxygen cylinder:
1 Refer to the table that follows for part number series 5500/5600/9700/9800:
NOTE: The maximum fill pressure is 1800 psi (124.11 bar).
| Actual Pressure (Psig) | Usable Oxygen Volume in 4.25 Cuft Oxygen Cylinder (Liters Normal Temperature-Pressure Dry) | Usable Oxygen Volume in 7.15 Cuft Oxygen Cylinder (Liters Normal Temperature-Pressure Dry) | Usable Oxygen Volume in 11 Cuft Oxygen Cylinder (Liters Normal Temperature-Pressure Dry) |
|---|---|---|---|
| 100 | 0 | 0 | 0 |
| 200 | 6 | 10 | 16 |
| 300 | 12 | 21 | 32 |
| 400 | 18 | 31 | 48 |
| 500 | 25 | 42 | 65 |
| 600 | 31 | 53 | 81 |
| 700 | 38 | 64 | 98 |
| 800 | 44 | 75 | 115 |
| 900 | 51 | 86 | 132 |
| 1000 | 57 | 97 | 149 |
| 1100 | 64 | 108 | 166 |
| 1200 | 71 | 119 | 183 |
| 1300 | 77 | 130 | 201 |
| 1400 | 84 | 141 | 218 |
| 1500 | 91 | 153 | 235 |
| 1600 | 97 | 164 | 252 |
| 1700 | 104 | 175 | 269 |
| 1800 | 110 | 186 | 287 |
NOTE: The normal temperature-pressure dry is 21 DEG.C (70 DEG.F) with no water content.
2 Refer to the table that follows for part number series 3552/AV20145XX/3559: NOTE: The maximum fill pressure is 1850 psi (127.55 bar).
| Actual Pressure (Psig) | Usable Oxygen Volume in 4.25 Cuft Oxygen Cylinder (Liters Normal Temperature-Pressure Dry) | Usable Oxygen Volume in 7.15 Cuft Oxygen Cylinder (Liters Normal Temperature-Pressure Dry) | Usable Oxygen Volume in 11 Cuft Oxygen Cylinder (Liters Normal Temperature-Pressure Dry) |
|---|---|---|---|
| 100 | 0 | 0 | 0 |
| 200 | 6 | 10 | 16 |
| 300 | 12 | 21 | 32 |
| 400 | 18 | 31 | 48 |
| 500 | 25 | 42 | 65 |
| 600 | 31 | 53 | 81 |
| 700 | 38 | 64 | 98 |
| 800 | 44 | 75 | 115 |
| 900 | 51 | 86 | 132 |
| 1000 | 57 | 97 | 149 |
| 1100 | 64 | 108 | 166 |
| 1200 | 71 | 119 | 183 |
| 1300 | 77 | 130 | 201 |
| 1400 | 84 | 141 | 218 |
| 1500 | 91 | 153 | 235 |
| 1600 | 97 | 164 | 252 |
| 1700 | 104 | 175 | 269 |
| 1800 | 110 | 186 | 287 |
| 1850 | 114 | 192 | 295 |
NOTE: The normal temperature-pressure dry is 21 DEG.C (70 DEG.F) with no water content.
3 Refer to the table that follows for part number series AV2014478/AV2014603/708-021-01: NOTE: The maximum fill pressure is 3625 psi (249.93 bar).
| Gage Reading | Actual Pressure (Psig) | Usable Oxygen Volume (Liters Normal Temperature-Pressure Dry) |
|---|---|---|
| Empty | 300 | 0 |
| One-Quarter | 900 | 25 |
| Half | 1800 | 58 |
| Three-Quarters | 2700 | 91 |
| Full | 3625 | 125 |
NOTE: The normal temperature-pressure dry is 21 DEG.C (70 DEG.F) with no water content.
(e) Record the quantity of oxygen in the portable oxygen cylinder. (2) You can ignore the steps that follow if you have an approved procedure to make sure that there is sufficient oxygen available before each flight given by the local airworthiness authorities:
(a) Calculate the total quantity of oxygen in all the portable oxygen cylinders installed in the aircraft.
(b) Make sure that the quantity of the available oxygen obeys the airworthiness instructions for the aircraft configurations.
(3) Carefully remove each connected oxygen mask from the applicable stowage bag.
(4) Make sure that oxygen mask is not disconnected from the related portable oxygen cylinder (Ref. AMM TASK 35-32-42-000-001).
(5) Make sure that:
- The flexible hose of the oxygen mask has no damage, permanent kinks, cracks and/or discoloration.
- The oxygen mask is clean and has no damage, cracks, deformation and/or discoloration.
B. Filling of the Portable Oxygen Cylinder(s)
(1) If the quantity of oxygen available is not sufficient, fill the applicable portable oxygen cylinder(s):
(a) Remove the portable oxygen cylinder(s) (Ref. AMM TASK 35-32-42-000-001).
(b) Send the portable oxygen cylinder(s) to the workshop and fill it (them) to the correct pressure.
(c) Install the filled portable oxygen cylinder(s) (Ref. AMM TASK 35-32-42-400-001).
5. Close-up(1) If the quantity of oxygen available is not sufficient, fill the applicable portable oxygen cylinder(s):
(a) Remove the portable oxygen cylinder(s) (Ref. AMM TASK 35-32-42-000-001).
(b) Send the portable oxygen cylinder(s) to the workshop and fill it (them) to the correct pressure.
(c) Install the filled portable oxygen cylinder(s) (Ref. AMM TASK 35-32-42-400-001).
Subtask 35-32-42-410-057-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) If you removed the portable oxygen cylinder(s), install them (Ref. AMM TASK 35-32-42-400-001).
(3) Close all doors.
Subtask 35-32-42-860-063-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) If you removed the portable oxygen cylinder(s), install them (Ref. AMM TASK 35-32-42-400-001).
(3) Close all doors.
B. Put the aircraft back to its initial configuration.
(1) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(1) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).