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conditions are true:
* Gear is not down and locked
* Flap position is from 15 to 25 units
* Thrust levers are set for landing.
For this set of conditions, the pilot cannot stop the horn.
In the fourth set of conditions, the horn sounds when the gear is
not down and locked and the flap position is more than 25 units.
The pilot cannot stop the horn.
When the airplane is in the fourth set of conditions, the system
inhibits the landing warning horn during a go-around. The
system inhibits the warning for 12 seconds after the pilot puts
the gear lever in the up position.
AURAL WARNING SYSTEM - OPERATION - LANDING
EFFECTIVITY
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AURAL WARNING SYSTEM - OPERATION - LANDING
AURAL WARNING SYSTEM - OPERATION - LANDING
EFFECTIVITY
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General
The aural warning module gives the sound of a fire bell for a fire
warning.
These are the conditions which cause the fire warning:
* Engine fire
* Cargo smoke
* Wheel well fire
* APU fire.
The fire bell stops when you push the bell cutout switch or the
fire warning light.
AURAL WARNING SYSTEM - OPERATION - FIRE
EFFECTIVITY
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AURAL WARNING SYSTEM - OPERATION - FIRE
AURAL WARNING SYSTEM - OPERATION - FIRE
EFFECTIVITY
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General
The aural warning module gives the sound of a wailer for an
autopilot disconnect warning. Do one of these things to stop the
wailer:
* Push the autopilot disconnect switch
* Push the autopilot P/RST switch
* Engage the autopilot again.
The aural warning module gives the sound of a clacker for an
airplane overspeed warning.
The aural warning module gives the sound of an intermittent
horn for a cabin pressure warning. Push the altitude horn cutout
switch on the P5 overhead panel to stop the intermittent horn.
AURAL WARNING SYSTEM - OPERATION - AUTOPILOT DISCONNECT, OVERSPEED, CABIN PRESSURE
EFFECTIVITY
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AURAL WARNING SYSTEM - OPERATION - AUTOPILOT DISCONNECT, OVERSPEED, CABIN PRESSURE
AURAL WARNING SYSTEM - OPERATION - AUTOPILOT DISCONNECT, OVERSPEED, CABIN PRESSURE
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
31-51-00-011
General
The aural warning unit gives the sound of a single high chime
for a flight crew call.
When the flight attendant calls the flight crew, there is a single
high chime.
When the ground station uses SELCAL to call the flight crew,
there is a single high/low chime.
AURAL WARNING SYSTEM - OPERATION - FLIGHT COMPARTMENT CALL
EFFECTIVITY
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AURAL WARNING SYSTEM - OPERATION - FLIGHT COMPARTMENT CALL
AURAL WARNING SYSTEM - OPERATION - FLIGHT COMPARTMENT CALL
EFFECTIVITY
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General
The aural warning system test checks the aural warning
module for correct operation. You hear the intermittent horn and
the clacker sounds for a good test.
A test switch is on the top of the aural warning module. The test
switch is spring loaded so that it returns to center when it is
released. Use a screwdriver to turn the switch. Turn the switch
clockwise to test channel A. Turn the switch counterclockwise to
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