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A 757 MAINTENANCE MANUAL
 (4)  S 715-147Push in the ENABLE/VERIFY switch and hold, and then push in the VERIFY switch. Release the two switches at the same time.
 (5)  S 715-148Make sure that you have these indications: (a) The M102 unit display shows BRK A/B 1. (b) The AUTOBRAKES light comes on, the AUTOBRAKES selector switch disarms, and the EICAS message, AUTOBRAKES, is shown. (c) The pressure gage indication on wheel 1 increases to 1200 |200 psi for 10 |5 seconds and then goes back to 300 |200 psi for 5 |3 seconds.
 (6)  S 715-149Repeat for the AUTOBRAKES selector switch positions 2, 3, 4 and MAX AUTO. Make sure that the pressure and the display message are as shown in Table 4, the pressure goes back to 300 |250 psi, and the switch disarms.

 ~........................................................................ | TABLE 4 | .......................................................................... | Autobrake Sel Position | Display Message (M102) | Brake Pressure (psi) | .......................................................................... | 2 | BRK A/B 2 | 1750 |250 | | 3 | BRK A/B 3 | 2000 |250 | | 4 | BRK A/B 4 | 2400 |250 | | MAX AUTO | BRK A/B 5 | 3000 |250 | | | | | 2........................…........................…......................1
 S 715-150
 (7)  
Put the BRAKE TEST rotary switch in the NORM position.

 S 865-151

 (8)  
Remove the power from the right and left hydraulic systems (AMM 29-11-00).

 S 715-152

 (9)  
Push in the ENABLE/VERIFY switch and hold, and then push in the VERIFY switch. Release the two switches at the same time.

 (10)
 Make sure that the M102 display shows PRES ACC.

 (11)
 Push in and release the RESET button on the M102 unit.

 S 715-153
 S 865-154
 

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A

757 MAINTENANCE MANUAL
 S 945-242
 (12) Do the steps in the task to Put the Airplane Back to Its Usual Condition if it is not necessary to do any more maintenance.
 TASK 32-42-00-715-155
 8.  Autobrake RTO (Refused Take Off) Test_____________________________________
 A. General
 (1)  
The autobrake RTO system automatically applies full system pressure (3000 psi) to the brakes for the RTO test. The system is armed at the autobrakes selector switch on the pilots center instrument panel, P1-3.

 B.
Equipment

 (1)  
Pressure gages - 0-4000 psi, for BMS 3-11
 hydraulic fluid

 C.
Prepare for the Test

 S 495-160
 (1)  
Make sure that downlocks are installed on the main and nose landing gear (AMM 32-00-20).

 S 715-165

 (2)  
Prepare for the Test.

 S 865-161

 (3)  
Release the parking brake.

 S 865-162

 (4)  
Put the thrust levers in the idle position.

 S 865-163

 (5)  
Retract the spoilers.

 (6)  
Put the L, R and C IRUs in the NAV mode (AMM 34-21-00).

 S 865-164
 NOTE: The IRUs must be aligned.
____
 D. Do the Test of Autobrake RTO Power Distribution and Indication
 S 715-167
 (1)  Put the Autobrake Selector Switch on panel P1-3 to the RTO position and make sure that it stays in that position.
 

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A
757 MAINTENANCE MANUAL
 S 865-168
 (2)  
Open these circuit breakers on the P11 panel:

 (a)  
11S14, AUTOBK ANTISKID TEST IND 1

 (b)  
11S21, AUTOBK ANTISKID TEST IND 2

 S 715-169
 (3)  
Make sure that the autobrake selector switch goes to the OFF position.

 S 865-170

 (4)  
Close these circuit breaker on the P11 panel:

 (a)  
11S14, AUTOBK ANTISKID TEST IND 1

 (b)  
11S21, AUTOBK ANTISKID TEST IND 2

 E.
Do the Autobrake RTO Operational Test

 S 495-171
 WARNING:_______THIS TEST APPLIES AND RELEASES THE 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.
 (1)  
Make sure that chocks are installed on the airplane wheels.

 S 865-172

 (2)  
Make sure that hydraulic power has been removed from the right and the left hydraulic systems (AMM 29-11-00).
　
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