S 865-042
(10)
Install the hubcaps on all the wheels.
S 865-043
(11)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel:
(a)
6F4, LANDING GEAR PARKING BRAKE VLV
32-42-00
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(12) Do the steps in the Put the Airplane Back to Its Usual Condition task if it is not necessary to do any additional maintenance.
TASK 32-42-00-715-044
6. Autobrake Control Test, Speedbrake Switch Test, and Landing Gear Down and
_________________________________________________________________________ Locked Test
___________
A. General
(1)
The autobrake control test (par. D.) does a check to make sure that the autobrake arm/disarm circuit operates correctly. This test will also find a defective channel on the Antiskid/Autobrake Control Unit, M102, display.
(2)
It is necessary to operate the spoiler handle to do the speedbrake switch test. The test makes sure that the position input signal is sent from the handle to the M102 unit to disarm the autobrake function.
(3)
It is necessary to use proximity sensor deactuators to simulate landing gear position for the landing gear down and locked test. The test makes sure that there is a correct input signal for the gear down-and -locked position for air or ground mode operation.
B.
Equipment
(1)
Proximity Switch Actuator/Deactuator Set -
ú A27092-53 (4 Rectangular sensor deactuators are necessary).
C. Prepare for the Test.
S 945-045
(1)
Do the Prepare for the Tests task.
S 495-238
(2)
Make sure that the landing gear downlocks are installed (AMM 32-00-20).
(3)
Make sure that chocks are installed on the wheels.
(4)
Release the parking brake.
(5)
Put the two thrust levers in the idle position.
S 865-052
(6)
Pressurize the right and left hydraulic systems and reservoirs (AMM 29-11-00).
(7)
Retract the spoilers.
S 495-046
S 865-047
S 865-048
S 865-053
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(8) Put the L, R and C IRUs in the NAV Mode (AMM 34-21-00).
NOTE: IRUs must be aligned.
____
D. Do a Test of Autobrake Control
S 865-055
(1)
Push in and release the RESET button on the M102 unit. Wait for 5 |3 seconds (the M102 display will show MEM CLR).
S 715-056
(2)
Put the AUTOBRAKES selector switch on the P1-3 panel in position 1. Make sure that it arms and that the AUTOBRAKES light is off.
S 715-057
(3)
Push the ENABLE/VERIFY switch and hold, and then push the VERIFY switch. Release the two switches at the same time.
S 715-058
(4)
Make sure that you have these indications:
(a)
The M102 unit display flashes WAIT four times and shows TEST END after 15 |5 seconds, and then goes off after 5 |3 seconds.
(b)
The AUTOBRAKES selector switch moves to DISARM and the AUTOBRAKES light on the P1-3 panel comes on.
(c)
The AUTOBRAKES message appears on the EICAS advisory display.
S 715-059
(5)
Put the AUTOBRAKES selector switch in position 1. Make sure that it arms.
S 715-060
(6)
Make sure that the AUTOBRAKES light and the AUTOBRAKES advisory message go off.
S 865-061
(7)
Open this circuit breaker on the P11 panel:
(a)
11S21, AUTOBK ANTISKID TEST IND 2
S 715-062
(8)
Make sure that the AUTOBRAKES selector switch stays armed, the AUTOBRAKES light goes off, and the AUTOBRAKES advisory message does not appear on the EICAS display.
S 865-063
(9)
Close this circuit breaker on the P11 panel:
(a)
11S21, AUTOBK ANTISKID TEST IND 2
32-42-00
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(10)
Open this circuit breaker on the P11 panel:
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