NOTE: The Built-in-Test Equipment (BITE) of the Antiskid/Autobrake
____ Control Unit are used to do this test. The BITE test switches and the test instruction placard are on the front panel of the control unit.
S 714-023
(1)
Prepare for the test.
(a)
Supply electrical power (Ref 24-22-00)..
(b)
Release the parking brake.
(c)
Pressurize the right hydraulic system and reservoir (Ref 29-11-00).
(d)
Put the thrust levers in the idle position.
(e)
Retract the spoilers.
(f)
Put the L, R, and C IRU's in the NAV mode (Ref 34-21-00).
NOTE: The IRU's must be aligned.
____
(g)
Open the forward cargo door, 821 (Ref 06-46-00).
(h)
Remove the E5 rack access panel on the forward bulkhead of the forward cargo compartment cargo (Ref 25-50-03).
(i)
Find the antiskid/autobrake control unit on the E5 rack.
S 714-024
(2)
Do the operational test of the shuttle valve.
(a)
Put the AUTOBRAKES selector switch on the P1-3 panel in position 1.
(b)
Push in the ENABLE/VERIFY switch on the control unit and hold, and then push in the VERIFY switch and release the two switches at the same time.
NOTE: The display flashes WAIT while the test operates.
____
(c)
Make sure that the indication TEST END or a fault indication is shown on the display. If a fault is shown, push in the VERIFY switch to continue the test until TEST END is shown on the display.
(d)
Push in the RESET button on the control unit.
32-42-10
ALL ú ú 12 Page 406 ú Dec 20/90
A
757
MAINTENANCE MANUAL
S 714-063
WARNING:_______ THIS TEST APPLIES AND RELEASES BRAKES. MAKE SURE THAT THE AREA
AROUND THE BRAKES IS CLEAR AND THAT CHOCKS ARE INSTALLED ON THE
AIRPLANE WHEELS. THIS WILL PREVENT POSSIBLE INJURY TO PERSONS
OR DAMAGE TO EQUIPMENT.
(3)
Do the autobrake application test.
(a)
Put the AUTOBRAKES selector switch on the P1-3 panel in position 1 and make sure that it arms.
(b)
Do these steps with the controls on the Antiskid/Autobrake Control Unit: 1) Turn the BRAKE TEST rotary switch to the A/B position. 2) Push in the ENABLE/VERIFY switch and hold it, and then push
in the VERIFY switch. Release the two switches at the same time. 3) Make sure that the unit display shows BRK A/B 1.
(c)
Make sure that the EICAS message AUTOBRAKES message appears # , and the AUTOBRAKES light illuminates.
(d)
Make sure that all the brakes apply for about 15 seconds and then release.
S 864-026
(4)
Put the AUTOBRAKES selector switch in the OFF position.
S 864-027
(5)
Put the the BRAKE TEST rotary switch in the NORM position.
S 864-028
(6)
Push in the RESET button on the control unit.
S 864-029
(7)
Put the L, R, and C IRUs to the OFF position..
S 794-030
(8)
Do a check of the installation for leaks.
S 944-031
(9)
Do the steps in in the procedure to Put the Airplane Back to Its Usual Condition if it is not necessary to do more maintenance.
32-42-10
ALL ú ú 05 Page 407 ú Dec 20/90
A
757 MAINTENANCE MANUAL
TASK 32-42-10-004-032
5. Autobrake Shuttle Valve - Removal (Fig. 401)_________________________________
A. Access
(1)
Location Zones
211 Control Cabin, Left
212 Control Cabin, Right
731 Landing Gear Left
741 Landing Gear Right
120 Main Equipment Center, Right
B.
Procedure to Remove the Valve
S 034-033
(1)
Disconnect the hydraulic line that is connected to the top of the valve module.
S 024-084
(2)
Remove the valve from the module.
S 034-035
(3)
Remove the retainers and the O-rings from the valve. Discard the O-rings.
TASK 32-42-10-404-036
6. Autobrake Shuttle Valve - Installation (Fig. 401)______________________________________
A. Consumable Materials
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：757 AMM 飞机维护手册 起落架 CHAPTER 32 - LANDING GEAR 3(50)
