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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
OXYGEN SYSTEMPASSENGER SERVICE UNIT
PASS L
BXXX PASSENGER OXYGENLATCH ACTUATOR28V DC
PASS R BAT. BUS
MXXX LEFTSIDE PASSENGERMASK BOX (EXAMPLE)
ATTENDANT/LAVATORY
INDSERVICE UNITT5 MANUAL
SEC
CONTROL
D BXXX PASSENGER OXYGEN
LATCH ACTUATOR
R323 MANUAL OXYGENP18 CIRCUIT BREAKER PANEL MXXX LEFTSIDEDEPLOY RELAYATTENDANT/LAVATORY
MASK BOX (EXAMPLE)
PASS OXYGEN
CREW
PASSENGER SERVICE UNIT
OXYGEN
NORMAL
10
BXXX PASSENGER OXYGEN
515
LATCH ACTUATOR
ON
T 5 MXXX RIGHTSIDE PASSENGER
SEC
D
0 20
MASK BOX (EXAMPLE)
OXY PRESS
PASS OXY
PSI X 100
ON
R322 AUTO OXYGEN14,000 FT DEPLOY RELAY
LAVATORY SERVICE UNITS813 ALTITUDEPRESSURE SWITCH
BXXX PASSENGER OXYGENS1 PASS OXYGEN SWITCHLATCH ACTUATOR
MXXX RIGHTSIDE LAVATORYA
MASK BOX (EXAMPLE)(MASTER DIM
& TEST) ATTENDANT SERVICE UNIT
L1 PASS OXY ON LIGHT MASTER
CAUTION P5-14 OXYGEN SYSTEM MODULE(ON THE P5 AFT OVERHEAD PANEL) P5-19 FLIGHTRECORDER AND
BXXX PASSENGER OXYGENMACH AIRSPEED LATCH ACTUATORWARNING MODULE
R324 OXYGEN MXXX AFT AISLE ATTENDANT
INDICATOR RELAY MASK BOX (EXAMPLE)E3-1 ELECTRICAL SHELF
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
Passenger Oxygen System Schematic
Figure 2 (Sheet 1)
A 737-300/400/500MAINTENANCE MANUAL
OXYGEN MASK DEPLOYMENT CHEMICALRELEASE
OXYGEN GENERATOR
SEE BCABLESEE C
PASSENGER
SERVICE UNIT
(PSU) MASK BOX
MASK BOX DOORMASK
DOOR
(OPEN POSITION) LANYARD
SEE A
OXYGEN MASK LOCATIONS WITH
OXYGEN MASKS EXTENDED
____NOTE: PULL THE MASK LANYARD. THIS REMOVES
(EXAMPLE) THE RELEASE PIN FROM THE FIRING PIN.
THE GENERATOR CORE IGNITES AND
PRODUCES OXYGEN.
PASSENGER SERVICE UNIT (PSU)(EXAMPLE)
A
LATCH ACTUATOR
BOX
LATCH ACTUATOR
MASK
OXYGEN MASK DEPLOYMENTLEVER B
DOOR LATCH GENERATORRELIEFCORE FILTER
FLAT TOOL VALVE
FIRINGPIN PUNCH1
(USED FOR DEPLOYMENTPIN
MASK BOX TEST STOP
OF TEST STOP BUTTON)RELEASE
DOOR BUTTON
FLAT TOOL2 PIN
STEP 1 STEP 2
(USED FOR MANUAL
DEPLOYMENT OF DOOR)
DEPRESSIONCLOSEDOF TEST STOP
RELEASEPOSITION BUTTON RESETS
TO OXYGENLATCH ACTUATOR CABLE
MASK PLUNGER
CHEMICAL OXYGEN GENERATOR
AFT AISLE ATTENDANT'S
1 ALL EXCEPT LAVATORY AND
(EXAMPLE)
MASK BOX
MASK BOX DOOR(RESTRAINED BY TEST STOPMASK BOX DOOR
C
BUTTON IN TEST POSITION)(CLOSED POSITION)
ATTENDANT'S MASK BOX
2 LAVATORY AND AFT AISLE
STEP 3 STEP 4
MASK BOX DOOR OPERATION
Passenger Oxygen System Schematic
Figure 2 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
PASSENGER OXYGEN SYSTEM - TROUBLE SHOOTING
__________________________________________
1. General_______
A. Troubleshooting procedures are given for the Automatic Actuation and Manual Actuation. You can do one of the two procedures independently of each other. For a complete system test, do the two procedures.
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