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发表于 2014-2-4 09:24:10
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来自： 中国贵州遵义
TASK 35-00-00-910-802
(1) Make sure only approved persons do maintenance on the oxygen systems. Approved persons
are personnel who are trained and understand the dangers and procedures to safely do
maintenance on oxygen systems.
(2) To make sure the airplane is electrically grounded, do this task: Static Grounding,
TASK 20-40-11-910-801.
SUBTASK 35-00-00-610-004
WARNING: DO NOT ALLOW OIL, GREASE, DIRT OR OTHER FLAMMABLE MATERIALS TO TOUCH
OXYGEN SYSTEM COMPONENTS. THESE MATERIALS WHEN EXPOSED TO
PRESSURIZED OXYGEN CAN IGNITE AND CAUSE AN EXPLOSION. A FIRE OR
EXPLOSION CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3) Make sure the maintenance area is clean and free from these hazards:
(a) Flammable materials
NOTE: Flammable materials include; oil, grease, gasoline, kerosene, cleaning solvents
etc.
(b) Contamination sources
NOTE: Contamination sources include; dust, lint, metal filings, human skin, or other
organic materials.
(c) Potential ignition sources
NOTE: Potential ignition sources include; hot exhaust, sparks, flame and burning
cigarettes.
(d) Make sure the fittings are clean and free of contamination, and unwanted material.
(e) Use only approved procedures to clean oxygen system components, do this task: Clean
the Oxygen System Components, TASK 35-00-00-100-801.
(f) Make sure your hands, clothing, equipment, and tools are clean and free of petroleum
products.
(g) Use white protective gloves, G50140 or lint-free gloves, G01306 to do the work on the
oxygen system.
NOTE: Only use protective gloves, G50140 to clean the oxygen system and lint-free
gloves, G01306 for general maintenance of the oxygen system.
SUBTASK 35-00-00-100-002
WARNING: USE ONLY OXYGEN-CLEAN COMPONENTS IN THE OXYGEN SYSTEM. IF YOU DO NOT
USE OXYGEN-CLEAN COMPONENTS, A FIRE OR AN EXPLOSION CAN OCCUR. THIS
CAN CAUSE DAMAGE TO EQUIPMENT OR INJURIES TO PERSONS.
(4) Make sure the fittings are clean and free of contamination, and threaded chips.
NOTE: Oxygen clean fittings come from a sealed package labeled for oxygen system
installation. Make sure that you use only oxygen clean fittings. Some fittings used in the
oxygen system are the same as fittings in other systems and are not oxygen clean. If it
is necessary to clean parts, use the applicable oxygen procedures to clean the parts.
This also applies to tube caps or plugs which must be as clean as the installation connections.
WARNING: OPEN OXYGEN SYSTEM VALVES SLOWLY. IF YOU OPEN A VALVE QUICKLY, THE
TEMPERATURE OF THE OXYGEN CAN INCREASE. THIS CAN CAUSE A FIRE OR AN
EXPLOSION. A FIRE OR EXPLOSION CAN CAUSE INJURY TO PERSONS AND
DAMAGE TO EQUIPMENT.
(5) Open the oxygen system valves slowly.
NOTE: This will stop the quick (rapid) pressurization of the oxygen system. If the oxygen
system is pressurized too quickly, it possible to get gas compression and a subsequent
temperature increase.
SUBTASK 35-00-00-910-006
WARNING: DO NOT STAND OR SIT IN FRONT OF A HIGH PRESSURE OXYGEN SYSTEM
REGULATOR (ABOVE 1000 PSI, 6895 KPA) THAT IS PRESSURIZED. IF THE
REGULATOR FAILS, COMPONENTS OF THE REGULATOR CAN HIT AND INJURE YOU.
(6) Do not sit or stand in front of a high pressure regulator.
SUBTASK 35-00-00-910-007
WARNING: DO NOT USE GASKETS OR LUBRICANTS WHEN YOU CONNECT THE FITTINGS IN THE
OXYGEN SYSTEM. THE GASKETS OR LUBRICANTS CAN CAUSE A FIRE OR AN
EXPLOSION WHEN THEY ARE EXPOSED TO PRESSURIZED OXYGEN. A FIRE OR
EXPLOSION CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(7) Do not use gaskets or lubricants when you connect oxygen system fittings and tubing.
SUBTASK 35-00-00-420-001
WARNING: DO NOT USE THE B-NUT TO PULL THE FITTINGS INTO ALIGNMENT. IF THE FITTINGS
ARE NOT CORRECTLY ALIGNED, A CRACK CAN OCCUR WHICH CAN CAUSE A FIRE
OR EXPLOSION. A FIRE OR EXPLOSION CAN CAUSE INJURY TO PERSONS AND
DAMAGE TO EQUIPMENT.
(8) If two fittings are connected with a B-nut, make sure the fittings are aligned before you tighten
the B-nut.
SUBTASK 35-00-00-910-008
(9) Do not tighten the fittings while the oxygen system is pressurized.
SUBTASK 35-00-00-420-002
WARNING: DO NOT INSTALL LOW PRESSURE HOSES IN THE HIGH PRESSURE SYSTEM. THE
LOW PRESSURE OXYGEN HOSE CAN BURST AND POSSIBLY CAUSE A FIRE OR
EXPLOSION. A FIRE OR EXPLOSION CAN CAUSE INJURY TO PERSONS AND
DAMAGE TO EQUIPMENT.
(10) Do not connect the low pressure oxygen hoses in the high pressure system.
NOTE: Flexible hose assemblies are used in the high and low pressure systems and can be
connected to standard tubing connectors. Low pressure hoses operate at pressures
of100 psig (689 kPa) and must not be installed in the high pressure system. High
pressure can be more than 1850 psig (12,755 kPa).
WARNING: KEEP A GAP BETWEEN THE ELECTRICAL WIRING AND THE OXYGEN HOSES TO
PREVENT CHAFFING. CHAFFING CAN CAUSE DAMAGE TO THE ELECTRICAL WIRING
OR OXYGEN HOSES AND CAUSE A FIRE OR EXPLOSION. A FIRE OR EXPLOSION CAN
CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(11) Keep a 2 in. (51 mm) gap between the oxygen hose and the electrical wiring when the crew
oxygen boxes and crew mask stowage boxes are closed.
NOTE: If the gap is less than 2 in. (51 mm), install a clamp hose around the wiring as
necessary to stop the chaffing.
SUBTASK 35-00-00-860-004
CAUTION: MANUALLY OPEN AND CLOSE THE SHUTOFF VALVE, (25 IN-LB (2.8 NM), MAXIMUM).
IF YOU TIGHTEN THE VALVE ON THE OXYGEN CYLINDER MORE THAN 25 IN-LB
(2.8 NM), YOU CAN CAUSE DAMAGE TO THE SHUTOFF VALVE.
(12) Use only your hand to open or close the valves in the oxygen system.
SUBTASK 35-00-00-790-001
(13) Use only approved leak detection compound, G50306 to do leak checks.
SUBTASK 35-00-00-100-001
(14) Immediately after the test, rub off the leak detection compound, G50306 with a white cotton
wiper, G00034.
SUBTASK 35-00-00-910-010
(15) Make sure there is a sufficient flow of air through the work area when you do maintenance on
the oxygen system.
SUBTASK 35-00-00-420-003
(16) Do not permit the oxygen hoses to twist, kink, or collapse.
------------------------- END OF TASK ---------------------------
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