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Passenger Oxygen System
Passenger oxygen is provided by oxygen generating canisters.  There is one canister unit over each set of seats (left and right), in each lavatory, and at each Flight Attendant station. Each unit includes a chemical oxygen generator, oxygen mask(s) with reservoir bags, flow indicator, and hose(s) to convey oxygen from the generator to the masks.
Passenger mask units are installed in the overhead stowage rack utility panel above each seat row.   There are six masks on each row alternating in the following pattern: on one row there are 3 masks on the left and 3 on the right; on the next row there are 2 masks on the left and 4 on the right.  This pattern (3-3, 2-4) continues throughout the cabin.
Two mask units are installed at the forward and aft cabin attendant stations and in each lavatory.  A single mask unit is installed above the mid cabin attendant seat.
All oxygen compartment doors open automatically if the cabin altitude exceeds approximately 14,000 feet.  All passenger masks are retained on the utility box doors by a plastic holder and must be manually removed. Removing any one mask from a multiple mask unit compartment and pulling the mask toward the face so that the lanyard separates from the generator initiates the oxygen generating process and oxygen automatically flows through all masks in that compartment.  The generators provide sufficient oxygen for at least 15 minutes continuous use.
Caution: The oxygen generator surface temperature may reach 500° F
(260° C) when generating oxygen.  Do not touch or attempt to
remove generator.  Burn injury can result.  If an active generator
is inadvertently removed from the compartment, it must be
placed in a metal container such as a lavatory or galley sink.
Heat will scorch other materials or fabrics.
Note: Odor similar to scorched cloth may be created by activation of
generators.  The odor does not affect the purity of the oxygen and
there is no fire hazard.
Masks are continuous flow type with no shutoff valves provided.  Oxygen flow rates are low, so oxygen reservoir bas may not inflate fully between breathing cycles.  Inflation rate is dependent on cabin altitude and elapsed time since generator activation.  An inflation indicator (small green compartment at the inlet end of mask reservoir bag) inflates providing evidence of oxygen flow.  The oxygen delivered to a mask is supplemental to ambient air provided by air valves on front of the mask.
As a backup to the automatic system, a PASS OXY MASK switch, on the right side of the bulkhead behind the F/O’s seat, provides a manual override for releasing the masks.  Moving the switch to EJECT will open all oxygen compartment doors.
Power for releasing the door latches is normally provided by the left AC and DC electrical busses.  If the left AC and DC busses are deenergized for any reason, an alternate power source is provided automatically from the right AC and DC electrical busses.  A blue CABIN OXYGEN ON light on the annunciator panel will illuminate when all of the door latches in the passenger compartment have be activated.  If normal left or right electrical power is not available, the door latches must be opened manually.
Individual oxygen compartment doors can be opened manually by inserting a small diameter rod (paper clip) into the hole in the door.  Make contact with the latch opening mechanism, apply pressure, and push the object to release the latch.
MD-80 Rev. 12/01/00  #29 Continental Flight Manual

OXYGEN - FLIGHT COMPARTMENT

MD-80 Sec. 17 Page 5
Flight Manual Continental Rev. 12/01/00  #29

 

OXYGEN – PASSENGER COMPARTMENT
MD-80 Rev. 12/01/00  #29 Continental Flight Manual
Sec. 17 Page 6

COIL  HOLE 
LEVER ARM 
SMALL 
ROUND ROD 
LEVER ARM 
DOOR CUT  COIL 
AWAY FOR 
CLARITY 
STRIKER 
(ON INSIDE 
FACE OF DOOR) 
LATCHED (WITH DOOR CLOSED)  TO OPEN DOOR 
OR RESET (WITH DOOR OPEN) 
MD801702 

OXYGEN COMPARTMENTS - DOOR LATCH RELEASE AND RESET (BAYONET - TYPE LATCH)
Portable Oxygen Cylinders
Flight Compartment
One portable oxygen cylinder is located in the flight compartment.  The cylinder weighs approximately 10 pounds and has a capacity of 11 cubic feet.
The cylinder contains a hand shutoff valve, gauge, pressure regulator, demand regulator, pressure relief valve, carrying strap, demand outlet, and a 3-liter-per-minute continuous-flow outlet.
Passenger Compartment
Four portable 4.25 cubic feet oxygen cylinders and oxygen masks are located in the passenger compartment for use by the cabin attendants.  Each cylinder contains a hand shutoff valve, relief valve, and carrying strap.  Cylinders also have outflow valves coded for flow (liter-per-minute) at specified pressure altitude (thousands of feet).  The mask hose must be connected to the outlet, and the shutoff valve opened to supply oxygen to the mask.  See following table for number and type of oxygen cylinders.
　
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