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an aural warning, both speakers provide sound at the same
time.
BITE Switch
The BITE switch lets the operator do a test of each channel of
the aural warning module.
When you move the switch to the A position, channel A causes
the aural synthesizer to make the intermittent horn sound.
When you release the switch, channel A causes the aural
synthesizer to make the clacker sound. The sound comes out of
the top speaker.
When you put the switch to the B position and release it,
channel B makes the horn and clacker sounds. The sound
comes out of the bottom speaker.
AURAL WARNING SYSTEM - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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AURAL WARNING SYSTEM - FUNCTIONAL DESCRIPTION
AURAL WARNING SYSTEM - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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General
The aural warning module gives the sound of an intermittent
horn for a takeoff warning.
On the Ground
These are the conditions that cause the takeoff warning on the
ground:
* Position of the horizontal stabilizer is out of the green band
* Trailing edge flaps are less than 1 unit or more than 25 units
* Leading edge devices are retracted or there is
uncommanded motion
* Trailing edge flaps are assymetric, skewed, or there is
uncommanded motion
* Ground spoilers have hydraulic pressure
* Speedbake lever is not down
* Parking brake is set.
The airplane must be on the ground and you must move the
thrust levers towards takeoff power before the aural warning
system gives the takeoff warning sound for the conditions
above.
AURAL WARNING SYSTEM - OPERATION - TAKEOFF 1
EFFECTIVITY
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AURAL WARNING SYSTEM - OPERATION - TAKEOFF 1
AURAL WARNING SYSTEM - OPERATION - TAKEOFF 1
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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General
The aural warning module gives the sound of an intermittent
horn for a takeoff warning.
In the Air
The aural warning system can give the takeoff warning when
the airplane is in the air. This warning tells the flight crew that
the ground spoiler interlock valve is open.
You hear the warning when all of the following conditions are
true:
* The ground spoiler interlock valve is open
* The leading edge flaps are retracted
* The airplane is in the air.
To stop the warning, open the LANDING GEAR, TAKEOFF
WARNING CUTOFF circuit breaker on the load control panel
(P6).
AURAL WARNING SYSTEM - OPERATION - TAKEOFF 2
EFFECTIVITY
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AURAL WARNING SYSTEM - OPERATION - TAKEOFF 2
AURAL WARNING SYSTEM - OPERATION - TAKEOFF 2
EFFECTIVITY
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General
The aural warning module gives the sound of a continuous horn
for a landing warning.
There are four sets of conditions which cause the landing
warning.
In the first set of conditions, the horn sounds when these
conditions are true:
* Gear is not down and locked
* Flap position is from 0 to 10 units
* Thrust levers are set for landing
* Radio altitude is between 200 and 800 feet.
For the first set of conditions, push the horn cutout switch near
the flap lever to stop the horn.
In the second set of conditions, the horn sounds when these
conditions are true:
* Gear is not down and locked
* Flap position is from 0 to 10 units
* Thrust levers are set for landing
* Radio altitude is less than 200 feet.
For the second set of conditions, the pilot cannot stop the horn.
In the third set of conditions, the horn sounds when these
　
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