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ICE AND RAIN PROTECTION - PITOT AND STATIC - PITOT PROBE - FUNCTIONAL DESCRIPTION
ICE AND RAIN PROTECTION - PITOT AND STATIC - PITOT PROBE - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN 013-015, 201-999 30-30-00
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D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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ICE AND RAIN PROTECTION - PITOT AND STATIC - PITOT PROBE - FUNCTIONAL DESCRIPTION
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The angle of attack (AOA) sensor anti-icing system prevents ice
on the vane. This prevents false air data signals that ice can
cause.
Physical Description
The AOA sensor has these parts:
* Case
* Vane
* Electrical connectors (2)
* Alignment pins (2).
NOTE: Angle of Attack sensor is also called Alpha Vane.
Location
There are two AOA sensors. One on each side of the forward
fuselage.
General
The AOA sensors have these two integral heaters:
* Vane heater
* Case heater.
Training Information Point
You install the AOA sensor from the outside of the airplane.
See the navigation chapter for more information on the AOA
sensor. (SECTION 34-21)
WARNING: DO NOT TOUCH PROBES WHILE HEATERS ARE
ON. TEST HEATERS FOR OPERATION BY FEELING
FOR HEAT RADIATION IN THE NEAR VICINITY OF
HEATER BEING SUBJECTED TO TEST TO AVOID
POSSIBILITY OF PERSONNEL BEING BURNED.
ICE AND RAIN PROTECTION - PITOT AND STATIC - ANGLE OF ATTACK SENSOR
EFFECTIVITY
GUN ALL 30-30-00
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D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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ICE AND RAIN PROTECTION - PITOT AND STATIC - ANGLE OF ATTACK SENSOR
ICE AND RAIN PROTECTION - PITOT AND STATIC - ANGLE OF ATTACK SENSOR
EFFECTIVITY
GUN ALL 30-30-00
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Functional Description
The angle of attack sensor anti-icing system uses electric
power and resistance-type heating elements.
The system uses 115v ac and 28v dc power. The sensor heat
elements use 115v ac power. The current detection circuit uses
28v dc power.
Put the control switch to the ON position to turn on the sensor
heat. This lets 115v ac power through the current detection
circuit to the sensor heaters.
When the vane heater uses current, the current detection circuit
causes the ALPHA VANE amber light to go out. If the vane
heater does not use current, the circuit causes these
indications:
* Amber ALPHA VANE light comes on
* MASTER CAUTION and ANTI-ICE annunciator lights come
on.
Training Information Point
The current detection circuit does not monitor the case heat
element.
If the vane heater element fails, you must replace the sensor.
ICE AND RAIN PROTECTION - PITOT AND STATIC - ANGLE OF ATTACK SENSOR - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN ALL 30-30-00
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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ICE AND RAIN PROTECTION - PITOT AND STATIC - ANGLE OF ATTACK SENSOR - FUNCTIONAL DESCRIPTION
ICE AND RAIN PROTECTION - PITOT AND STATIC - ANGLE OF ATTACK SENSOR - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN ALL 30-30-00
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Purpose
The total air temperature (TAT) probe anti-icing system makes
sure there is no ice on the TAT probe. This prevents false air
data signals that ice can cause.
Physical Description
The total air temperature probe has these parts:
* Electrical connector
* Base plate
* Strut
* Engine bleed air connection
* Ram air sense tube.
Location
The TAT probe is on the left side of the forward fuselage.
General
There is one TAT probe on the airplane. The probe has one
heating element. If the element fails, you must replace the
probe.
Training Information Point
WARNING: DO NOT TOUCH PROBES WHILE HEATERS ARE
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