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module uses the wheel speed input to operate the auto
speedbrake actuator during the RTO function.
See the speedbrake control system section for more
information about the auto speedbrake system.
(SECTION 27-62)
The antiskid system operates normally during autobrake
operation.
When all conditions for disarming and de-application are
correct, the AACU controls these components:
* Autobrake pressure control module
* Autobrake disarm relay
* AUTO BRAKE DISARM amber light.
Manual brake application by the pilot will override and disarm
the autobrake system.
ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE GENERAL DESCRIPTION
EFFECTIVITY
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ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE GENERAL DESCRIPTION
ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE GENERAL DESCRIPTION
EFFECTIVITY
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Purpose
The antiskid transducers supply wheel speed data to the
antiskid/autobrake control unit to get wheel deceleration data.
This data also goes to the antiskid/autobrake control unit for
autobrake operation.
Location
There are four antiskid transducers. Each main landing gear
wheel has a transducer in the axle.
Physical Description
When the transducer shaft turns, it provides wheel speed input
to the transducer. The hubcap shaft on the inside of the hubcap
turns the transducer shaft when the wheel turns.
A lug on the transducer aligns with a slot in the adapter
assembly. This prevents rotation of the transducer in the
adapter assembly.
Training Information Point
The transducer is an LRU.
When you remove the hubcap and the two axle nut lock bolts,
you can remove the adapter assembly from the axle. You
remove the transducer from the adapter assembly after you
remove the retainer nut. You do not have to remove the axle
nut.
ANTISKID/AUTOBRAKE SYSTEM - TRANSDUCER
EFFECTIVITY
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ANTISKID/AUTOBRAKE SYSTEM - TRANSDUCER
ANTISKID/AUTOBRAKE SYSTEM - TRANSDUCER
EFFECTIVITY
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Purpose
The antiskid/autobrake control unit (AACU) contains circuit
cards for the antiskid and autobrake systems and for the related
BITE functions.
Location
The antiskid/autobrake control unit is on the E1-3 shelf in the
electronic equipment compartment.
Physical Description
The antiskid/autobrake control unit includes these cards:
* Outboard antiskid card
* Inboard antiskid card
* Autobrake card
* BITE card.
Functional Description
The antiskid/autobrake control unit sends brake release inputs
to the antiskid valves and brake application inputs to the
autobrake pressure control module.
The antiskid/autobrake control unit also monitors the antiskid
and autobrake systems for faults and does the built-in test
functions.
Built-in test functions on the BITE panel of the antiskid/
autobrake control unit lets you show faults and do tests on
the antiskid and autobrake systems.
CAUTION: DO NOT TOUCH THE ANTISKID/AUTOBRAKE
CONTROL UNIT BEFORE YOU DO THE
PROCEDURE FOR DEVICES THAT ARE
SENSITIVE TO ELECTROSTATIC DISCHARGE.
ELECTROSTATIC DISCHARGE CAN CAUSE
DAMAGE TO THE ANTISKID/AUTOBRAKE
CONTROL UNIT.
ANTISKID/AUTOBRAKE SYSTEM - ANTISKID/AUTOBRAKE CONTROL UNIT
EFFECTIVITY
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ANTISKID/AUTOBRAKE SYSTEM - ANTISKID/AUTOBRAKE CONTROL UNIT
ANTISKID/AUTOBRAKE SYSTEM - ANTISKID/AUTOBRAKE CONTROL UNIT
EFFECTIVITY
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32-42-00-004
Purpose
　
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