Airbus A300-600/A310-200
Airframe Systems
3
Book 3 - Table of Contents
•ATA 35 •ATA 49 •ATAs 70-80 70-80 •ATAs 70-80 •ATAs 70-80
Oxygen APU GE CF6-80C2A5F GE CF6-80A3 PW JT9D-7R4
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A300-600R / A310-200
ATA 35
OXYGEN
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OXYGEN SYSTEM The oxygen system comprises the crew and courier oxygen system and protective breathing equipment, including associated controls, monitors and indicators. The systems are independent of each other. Crew and Courier Oxygen System The system provides adequate oxygen to sustain the crew in the event of cabin decompression or emission of smoke and noxious gas. Each crew/courier station is equipped with a quick-donning mask which has a mask-mounted regulator. Oxygen is supplied to the masks from stationary high pressure oxygen cylinders via pressure regulator/transmitter units, distribution blocks and distribution lines. Protective Breathing Equipment Protective breathing equipment is installed for flight crew members.The equipment equipment is stored in various locations in the flight compartment and in the main deck cargo compartment. It is a self-contained unit with an oxygen supply. The equipment is used by crew members in the event of decompression or smoke or noxious gas emissions.
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FIXED OXYGEN SYSTEM
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GENERAL DESCRIPTION The crew oxygen system supplies oxygen from a gaseous high pressure source to the crew in case of decompression or emission of smoke and noxious gas. The system comprises : Oxygen Storage Oxygen Distribution Indicating Oxygen Storage The flight crew oxygen is supplied from four high pressure oxygen cylinders, located forward of the avionics compartment compartment on the right. Oxygen Distribution Oxygen is supplied to the flight compartment crew stations through a supply circuit which includes two overpressure overpressure manifolds, four pressure regulators, two supply valves, two distribution manifolds, low pressure supply lines and quick-donning masks. Indicating The indicating system provides control and monitoring of the oxygen source and supply pressures.
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FIXED OXYGEN SYSTEM
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LOW PRESSURE DISTRIBUTION IN THE COMPARTMENT A flexible hose connected connected to the bleed port of the HP transmitter/regulator transmitter/regulator assembly, ensures a connection to a rigid line. A supply solenoid valve which enables the downstream distribution system to be supplied or cut off by direct action of the crew on the control and monitoring panel in the flight compartment. Electrical supply to the solenoid valve is only applied for a fraction of a second corresponding to the opening or closing time of the valve. This valve is controlled via an electronic control box 19HT located on shelf 96VU in the avionics compartment (emergency smoke detection shelf).
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ATA 35 AIRBUS A300-600/A310-200
FIXED OXYGEN SYSTEM
ELECTRONIC RACK 90VU
NOTE: A310 Oxygen Control Box 19HT located aft of engine 1/2 Fire Detection Control Boxes on Shelf 96VU.
SHELF
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ATA 35 AIRBUS A300-600/A310-200
GENERAL General The indicating system provides control and monitoring of the oxygen source and supply pressures. The system comprises: Cylinder Pressure Gage (Direct Reading) It is possible to check the cylinder pressure by removing the case assembly of the storage compartment, by reading of the pressure gage on the cylinder valve assembly. This reading is intended for the maintenance personnel to check the cylinder pressure.
LP Indicators The LP indicators are remotely controlled by the LP transmitters mounted on the low pressure manifold in the storage compartment as follows : Crew LP indicator 4HT/LP 4HT/LP transmitter transmitter 31HT Courier LP indicator 49HT/LP transmitter transmitter 40HT They indicate the pressure in the crew and courier distribution systems. They include colored reading bands, identified clockwise by the following colors, Red: 0 to 38 psig, Amber: 38 to 70 psig, Green: 70 to 94 psig, Amber: 94 to 101 psig, Red: over 101 psig
HP Indicator Each HP indicator is remotely controlled by the transmitter incorporated in the high pressure stage of the regulator as follows: Cylinder 1- HP Indicator 6HT/Transmitter 8HT Cylinder 2- HP Indicator 48HT/Transmitter 48HT/Transmitter 34HT Cylinder 3 -HP Indicator 38HT/Transmitter 41HT Cylinder 4- HP Indicator 43HT/Transmitter 43HT/Transmitter 42HT It indicates, when the cylinder manual isolation valve is open, the pressure of the cylinder and the high pressure stage of the regulator. It is graduated in psi and divided into two colored reading bands: Red: 0-85 psig Green: 85-2025 psig
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FIXED OXYGEN SYSTEM - INDICATING
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REMOVAL / INSTALLATION Removal
Installation CAUTION
NOTE The procedure is identical for the four oxygen cylinders. CAUTION WHEN DISASSEMBLED TEMPORARILY, ANY PIPE OR UNIT MUST HAVE THE ENDS PROTECTED BY A DRY AND CLEAN METAL OR PLASTIC PLUG, AND BE PLACED IN A SEALED VINYL BAG. On oxygen cylinder (1) Remove Remove pressure pressure regulator regulator by loosening loosening nut . (2) Remove Remove discharge discharge indicat indicator or line. Discar Discard d sealing ring. (3) Loosen Loosen nuts and remove remove washers washers on on cylinder securing clamps. (4) (4) Remove Remove cylin cylinder der.. Preparation of Replacement Component ) Make certain that date limit has not been exceeded Visually check pressure gage and union threads.
NO COMPOUND, OTHER THAN SPECIAL MATERIAL No.05-003 MUST BE USED ON NUT THREADS OR ON THE FLARED PORTION OF THE LINE. THIS COMPOUND MUST BE USED SPARINGLY ON THE FIRST THREE MALE THREADS. NUTS MUST BE TIGHTENED TO THE REQUIRED TORQUE USING A TORQUE WRENCH ONLY. (1) Place cylinder cylinder careful carefully ly on its cradle cradle supports. (2) Connect pressure pressure regulator. regulator. Do not fully tighten nut at this stage. (3) Install Install new new sealing sealing ring ring and and connect connect discharge indicator line. Do not fully tighten nut at this stage. (4) Install cylinder cylinder securing securing clamps. clamps. Install washers and tighten nut. (5) Tighten pressure regulator nut. (6) Tighten discharge discharge indicator line union nut and TORQUE to between 159 and 177 lbf.in.
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OXYGEN CYLINDER WARNING: Personnel in charge of carrying out the actions must be aware of the risks involved in handling oxygen, which enhances combustion in the presence of fuel and becomes explosive in the presence of hydrocarbons (fuels, lubricants).
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OVERPRESSURE DISCHARGE MANIFOLDS - DISCHARGE PORT INDICATOR Each overpressure discharge manifold is provided within the storage compartment. compartment. The oxygen cylinder cylinder overpressure port and overpressure port of the regulator/transmitter are connected to those safety discharge manifolds by means of flexible hoses. A tube leads overpressure oxygen from the manifolds to the outside through a discharge indicator which is flush mounted on the fuselage. The discharge indicator consists of a green blow-out di sc which keeps the discharge tube shut. When subjected to pressure exceeding 20 psig the green disc blows out and reveals a yellow colored indication body visible from outside of the aircraft.
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OXYGEN CYLINDER
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QUICK DONNING MASK The quick-donning (less than 5 sec) oxygen mask consists of: (a)
(b)
(c) (c)
A harness harness inflated inflated by by a manual manual control control lever, lever, which is used simultaneously to remove the mask from its housing and inflate the harness enabling the mask to be donned. A deman demand d regulat regulator or with the three following following functions: - air (oxygen dilution or 100% pure oxygen according to altitude). - 100% oxygen without overpressure. - 100% oxygen with overpressure. The first two functions are ensured by the NORMAL 100% selector with positive locking on the 100% position, the last one by an emergency rotation knob (when pressed: intermittent continuous flow, when turned: continuous flow). A face face piece, piece, which which is is tightly tightly appl applied ied on the the face, face, and includes a high level dynamic type microphone with a built-in preamplifier. Oxygen supply to the mask remains ensured if after removing the mask assembly from the stowage box, the LH flap is closed again. In this case, a white flag with OXY ON indication appears to the right of the left flap. In this case, oxygen supply can be turned off when returning the mask to the stowage box, or even if the mask remains outside the stowage box, by momentarily moving the control slide downwards, which prevents the flag from appearing. MTT For Training Purposes Only
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QUICK DONNING MASK
OXYGEN FLOW INDICATOR BLINKER (CLOSED)
PANEL DOORS
RESET/TEST CONTROL SLIDE
A300 Fixed Oxygen System
NOTE: All FedEx A300-600 are modified with the new EROS type oxygen mask. All FedEx A310 series will be modified during the third quarter of 2001. MTT For Training Purposes Only
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STOWAGE BOX The stowage box houses the mask with deflated harness and smoke goggles. It comprises: A connector enabling connection of the flexible hose for oxygen supply to the mask. A two flap door maintaining the mask in its housing. The left flap is provided with a sliding control for operating an ON/OFF supply valve which releases oxygen to the mask regulator when the LH flap is opened. During restowing of the mask, it is necessary to pull on the sliding control to reset the ON/OFF valve in the OFF position. A white flag, marked OXYGEN, on the sliding control protrudes, thus preventing restowing of the mask with the valve valve in ON position. A rigid stainless steel tube connected to the pneumatic ON/OFF supply valve assembly. The supply valve assembly incorporates connector(a). A blinker flowmeter which flashes when oxygen is flowing. A precoiled flexible hose for oxygen supply connected to the valve, the free end of which includes a quick-disconnect connection with self-sealing coupling for connection to the relevant supply pipe of the mask regulator. A microphone lead tied to the oxygen oxygen flexible hose by ties and connected at one of its ends to a connector mounted on the box and enabling connection to the aircraft network; the other end is provided with ; quickdisconnect positive locking connector for connection to the relevant mask microphone supply cable.
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STOWAGE BOX
EROS MF20
NOTE: ACM 1/2 oxygen masks are not EROS MF20 type.
ACM 1
Folding seat on rear wall - LH side
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SMOKE GOGGLES The smoke goggles are enclosed in a cloth soft bag. They consist of a wide angle lens equipped with an adjustable extra wide fixing headband. The smoke goggles lens is of high grade optics with an antiabrasion coating on the outside surface and an antifogging coating on the inside surface. The wear of prescription glasses is possible.
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SMOKE GOGGLES
NOTE: Smoke Goggles type used at Captain and First Officer positions on A310 aircraft and A300/A310 ACM 12-3 positions in the flight compartment.
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EMERGENCY OXYGEN Lavatory Emergency Oxygen The chemical oxygen generator is a sodium-chlorate core installed in a stainless-steel housing. A thermal insulating material is used between the core and the housing. The chemical generator actuator is a springloaded striker and a percussion cap installed at one end of the housing. A pull-pin holds the striker away from the cap. A lanyard connects the pull-pin to the oxygen mask. A filter assembly is installed in the outlet end of the housing to prevent contamination contamination of the oxygen supply. A flexible hose connects the oxygen mask to the outlet manifold. The oxygen mask gets its oxygen supply from the outlet. The outlet is installed on the housing. A relief valve is installed at the outlet end of the housing. This will prevent a high pressure build-up if a failure of the outlet valve occurs. A temperature sensitive indicator tape is installed on the housing. The process of generating oxygen creates a fairly high temperature, this causes the indicator tape to change color from yellow to black. A black indicator tape signals that this chemical oxygen generator has been used. The oxygen mask is a face cone with a reservoir bag attached. The inhale, exhale and diluter valves are installed the face cone. A flow indicator is installed in the flexible hose connected to the oxygen mask. The flow indicator will show a green stripe when there is an oxygen flow.
The electrical door latch assembly holds the door of the emergency oxygen container closed. Spring pressure will open the door when the electrical latch assembly is electrically released. A door stop is installed installed in the emergency emergency oxygen container to permit the inspection and testing for the emergency oxygen container. The door stop is turned through 90 degrees to permit the door to open a few degrees and will prevent the mask from falling out. The door can be opened manually with a release tool, via an access hole to release the electrical latch assembly. The altitude switch closes when the cabin pressure drops to a pressure equivalent of 14000 +0/ -500 ft. This operates the emergency oxygen supply system. The MAN OVRD pushbutton switch (14WR) serves as a backup or override for the altitude switching circuit. A safety guard is fitted over the switch.
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EMERGENCY OXYGEN
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PACK AND RESTOW OXYGEN MASKS Fold the outer edges of mask bags bags inwards (lengthwise) to form three equal sections then fold upwards in half. Tuck head bands and mask bags into mask face cones. Place masks and coiled supply tubes into the oxygen container. NOTE: Ensure the oxygen mask tubes are not kinked. Hold masks in place, close and latch door. Test Carry out an operational test. Replace emergency oxygen container if door latching mechanism functions incorrectly. Replace oxygen generator when the indicator plate changes from yellow to black. Close-Up Make certain that working area is clean and clear of tools and miscellaneous items of equipment.
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PACK AND RESTOW OXYGEN MASKS
FIN 26WR
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CABIN ALTITUDE PRESSURE SWITCH To access the altitude switch remove the upper sidewall panel in the area of frame #10 at the left side of the flight compartment. compartment. The switch can can be removed by disconnecting the electrical connector and removing the screws and washers securing it to the bracket. A test of the switch can be preformed by utilizing a vacuum source and following maintenance manual procedures.
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CABIN ALTITUDE PRESSURE SWITCH
NOTE: Pressure switch FIN 16WR also is interfaced with cabin pressurization system for low pressurization conditions
FIN 16WR
D F W
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PORTABLE OXYGEN CYLINDER The oxygen source consists of a high pressure oxygen cylinder. The cylinder is located in the flight compartment and held in place by quick-release brackets. The cylinder has a capacity of 11 cu.ft. charged to 1800 psig at 21°C (70°F). The cylinder is equipped with a valve assembly including the following components: (1) A direct direct reading reading pressure pressure gage gage indicating indicating the the cylinder pressure.
(6)
A low pressure pressure relief valve valve with with a check check valve valve calibrated to limit all excessive pressure between 90 psig -beginning of opening opening and 135 psig -fully open.
(7) (7)
A demand demand regul regulato atorr enablin enabling g an oxyge oxygen n flow, flow, generated by the negative pressure in the oxygen mask during the inhalation phase, to be obtained from a standard supply point.
(8)
A constant constant flow outlet, not to be used by the flight crew.
(2) A high pressu pressure re relief relief valve, valve, with a safety safety burst burst disc in case overpressure occurs in the cylinder due to abnormal rise of temperature. The pressure limit is 2700 to 3000 psig. (3) A rotating rotating type type ON/OFF ON/OFF valve valve which contro controls ls the oxygen flow entering the high pressure chamber of the pressure regulation mechanism. (4) A charging charging valve valve directly directly connected connected to the the high pressure chamber of the pressure regulation mechanism and which enables the cylinder to be filled through the ON/OFF valve with a controlled flow. The charging speed must not exceed 300 psi/min. (5) A pressure pressure control control mechan mechanism ism which which ensures ensures pressure regulation to a pressure between 35 and 85 psig.
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EQUIPMENT
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PROTECTIVE BREATHING HOOD In the event of fire, smoke or noxious gas emission, a flight crew member uses the protective breathing equipment. The protective breathing hood equipment works with a semi-closed circuit. As soon as the "Pull to Activate" ring is disengaged from the unit, low pressure oxygen is produced by an oxygen generator. Oxygen flows from the generator into a venturi nozzle and mixes with the hood gases while it induces the flow through the CO2 scrubber. CAUTION MAKE SURE THAT THE TRANSPARENT BAG IS SEALED AND TIGHT AROUND THE CONTENT. THE HUMIDITY INDICATOR IN THE BAG IS BLUE. DO NOT USE THE DEVICE IF THE TRANSPARENT BAG IS NOT CORRECTLY SEALED OR IF THE HUMIDITY INDICATOR IS PINK.
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SMOKE HOOD
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