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EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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General
The components for the master caution system are in the flight
compartment.
Master Caution System Components
These are the master caution system components on the P7
glareshield panel:
* Master caution lights
* Left system annunciator lights
* Right system annunicator lights.
Input Components
Many systems provide discrete inputs to the master caution
system.
These are the components on the P5 aft overhead panel:
* IRS mode select unit
* Engine panel
* Flight recorder/Mach airspeed warning panel.
These are the components on the P5 forward overhead panel:
* Flight control panel
* Fuel control panel
* Generator drive and standby power panel
* APU indicator panel
* Window heat panel
* Probe heat panel
* Hydraulic panel
* System annunciators
* Air conditioning/bleed air controls panel.
The overheat/fire protection panel is on the P8 aft electronic
panel.
MASTER CAUTION SYSTEM - COMPONENT LOCATION - FLIGHT COMPARTMENT - 1
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
31-52-00-003
MASTER CAUTION SYSTEM - COMPONENT LOCATION - FLIGHT COMPARTMENT - 1
MASTER CAUTION SYSTEM - COMPONENT LOCATION - FLIGHT COMPARTMENT - 1
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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General
The IRS master caution unit provides discrete inputs to the
master caution system. The IRS master caution unit is on the
P61 panel in the flight compartment.
MASTER CAUTION SYSTEM - COMPONENT LOCATION - FLIGHT COMPARTMENT - 2
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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MASTER CAUTION SYSTEM - COMPONENT LOCATION - FLIGHT COMPARTMENT - 2
MASTER CAUTION SYSTEM - COMPONENT LOCATION - FLIGHT COMPARTMENT - 2
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
31-52-00-004
Lights
The 28v dc battery bus and the 28v dc bus 1 supply power for
the master caution lights and the system annunciator lights.
The 28v dc power goes through switches in the master caution
lights.
The power goes through the annunciation and dimming
module. When you select bright (BRT) on the master lights
control on P1, the voltage is 28 volts. When you select DIM on
the master lights control, the voltage is 16 volts.
Control
Power for the control of the master caution annunciation goes
through seperate circuit breakers on P6 to the control panels on
the overhead panel (P5) and the aft electronic stand (P8).
The MASTER CAUTION ANNUNCIATOR CONT 1 circuit breaker
supplies power to the logic in these panels:
* Flight control panel
* Fuel control panel.
The MASTER CAUTION ANNUNCIATOR CONT 2 circuit breaker
supplies power to the logic in these panels:
* Hydraulic panel
* Window heat panel
* System annunciators.
The MASTER CAUTION ANNUNCIATOR CONT 3 circuit breaker
supplies power to the logic in these panels:
* Air conditioning/bleed air control panel
* Engine panel.
The MASTER CAUTION ANNUNCIATOR CONT 4 circuit breaker
supplies power to the logic in these panels:
* IRS master caution unit
* Flight recorder/Mach airpseed warning panel.
The DC BUS INDICATION BAT circuit breaker supplies power to
the logic in the APU indicator panel and the generator drive and
standby power panel.
The DC BUS INDICATION BUS 1 circuit breaker supplies power
to the logic in the generator drive and standby power panel.
The FIRE PROTECTION DETECTION MA WRN & CONT circuit
breaker supplies power to the logic in the overheat/fire
protection panel.
MASTER CAUTION SYSTEM - INTERFACES
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
　
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