(b)
Keep the oxygen away from ignition sources (heat, sparks, flame) and other material that can cause an ignition.
(c)
Keep oxygen away from flammable material, fuel, paint thinners, solvents, and all other material that can burn.
(d)
Use only aviation grade oxygen that you can breathe, for the oxygen system.
(e)
Oxygen other than aviation grade can be satisfactory for you to breathe but it can contain too much water.
(f)
Too much water in the oxygen can freeze and can cause clogged lines, regulators, and valves of the oxygen system.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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ALL ú ú 01 Page 303 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
WARNING: YOU MUST OPEN VALVES SLOWLY OR HIGH TEMPERATURES CAN
_______ OCCUR. THIS CAN CAUSE A FIRE OR EXPLOSION AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(g)
When you slowly and fully open the shutoff valve, the risk of a fire or an explosion will decrease.
(h)
To open the valve on the crew oxygen cylinder, do the steps that follow: 1) Supply electrical power (AMM 24-22-00/201). 2) Make sure you close the OXYGEN SYSTEM IND circuit breaker
on the P18 panel.
CAUTION: DO NOT TIGHTEN THE VALVE MORE THAN THE GIVEN TORQUE.
_______ DAMAGE TO THE VALVE CAN OCCUR.
3) Slowly and fully open the shutoff valve on the oxygen cylinder. 4) Do not tighten the valve more than 25 pound-inches
(Hand tight). 5) Close the shutoff valve 1/4 of a turn. 6) When you put the system back to its initial condition, you
must keep the valve in this position with lockwire.
7) Immediately make sure the pressure indication on the aft overhead panel is approximately the same as the indication on the oxygen cylinder gage.
B. Equipment
(1)
Caps and Plugs - Clean, Packaged (for oxygen ports and open lines)
(2)
Oxygen Cylinders - Fully Charged and Serviceable
C. Consumable Materials
(1)
G00091 Compound - Oxygen System Leak Detection (MIL-PRF-25567)
(2)
G01505 Copper Lockwire - 0.020 inch diameter
D. References
(1) AMM 35-00-00/201, Oxygen
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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ALL ú ú 02 Page 304 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(2)
AMM 20-40-11/201, Static Grounding
(3)
AMM 20-30-51/201, Miscellaneous Materials
(4)
AMM 20-10-44/401, Lockwire
(5)
AMM 20-50-11/201, Standard Torque Values
E. Access
(1) Location Zone
208 Forward Cargo Compartment, Right
F. Procedure - Prepare for the Removal of the Oxygen Cylinder
S 863-023
(1)
Make sure that you ground the airplane correctly (AMM 20-40-11/201).
S 863-090
(2)
Remove the electrical power (AMM 24-22-00/201).
S 163-012
(3)
Make sure that the items that follow are clean:
(a)
Your hands, clothing, tools, oxygen cylinders and all other items that you use for maintenance on the oxygen system.
(b)
Make sure all materials are free from contamination.
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