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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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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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RTO Arm Logic
When you move the AUTO BRAKE select switch to the RTO
position, the antiskid/autobrake control unit starts a turn-on self
check. The autobrake system arms for the RTO autobrake
function when all of the these turn-on self check conditions
occur:
* AUTO BRAKE select switch to the RTO position
* No fault in the RTO autobrake function
* Two air ground systems in the ground mode
* Average of all wheel speeds less than 60 knots
* No fault in the normal antiskid system
* Two thrust levers are in the idle position
* Solenoid and control valve pressures less than 1000 psi.
The turn-on self check also does a test of the antiskid/autobrake
control unit and related components. While the turn-on self
check operates, the AUTO BRAKE DISARM light comes on for
1.4 seconds. If the turn-on self check fails, the RTO autobrakes
do not arm and the AUTO BRAKE DISARM light stays on.
RTO Application Logic
The autobrake function applies the brakes when these
conditions occur:
* RTO autobrake is armed
* Two thrust levers are in the idle position
* All wheel speeds average more than 88 knots
* No fault in the normal antiskid system
* Two normal metered pressures are less than 750 psi.
When the RTO autobrake function applies the brakes, it
energizes a relay in the antiskid/autobrake control unit. This
sends power to the solenoid and control valves on the
autobrake pressure control module.
The autobrake system sends full hydraulic pressure to the
brakes to slow and stop the airplane.
ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO ARM AND APPLICATION LOGIC
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-42-00-110
ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO ARM AND APPLICATION LOGIC
ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO ARM AND APPLICATION LOGIC
EFFECTIVITY
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-42-00-110
RTO Disarm Logic
The autobrake system releases the RTO autobrakes (if they
were applied) and disarms the autobrake system (the AUTO
BRAKE DISARM light does not come on) when any of these
conditions occur:
* AUTO BRAKE select switch to the OFF position
* Two air/ground systems are in the air mode.
If RTO autobrake was applied, the autobrake system releases
the RTO autobrakes and disarms the autobrake system (the
AUTO BRAKE DISARM light comes on) when any of these
conditions occur:
* One or both normal metered pressure more than 750 psi
* One or both thrust levers at more than idle position
* Fault in the autobrake system
* Fault in the normal antiskid system
* Speedbrake lever moved from the UP position to the DOWN
position.
Move the AUTO BRAKE select switch to the OFF position to
make the light go off.
ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO DISARM LOGIC
EFFECTIVITY
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-42-00-111
ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO DISARM LOGIC
ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO DISARM LOGIC
EFFECTIVITY
GUN ALL 32-42-00
Page 47
D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
32-42-00-111
General
These are the functions you can do with the BITE of the antiskid/
autobrake control unit (AACU):
* Display test
* Built-in test (BIT) memory (recall) test
* Antiskid/autobrake control test
* Normal antiskid brake test
* Alternate antiskid brake test
* Autobrake application test
* Wheel speed signal test
* Reset (memory clear).
The BITE instructions are on a placard that is inside the AACU.
To read the instructions, unlatch the placard, pull it out from the
unit and turn it to a position where you can read it while you do
the BITE tests.
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