S 865-121
 (12)
 Close the 7D15 FLT CONT CMPTR R PWR circuit breaker on the P7 Overhead Circuit Breaker Panel.

 S 715-122

 (13)
 Push and hold the first officer's autopilot disconnect switch.

 (a)  Make sure that these occur: 1) Captain's Master Warning light is on. 2) First officer's Master Warning light is on. 3) The AUTOPILOT DISC warning (red) is shown on the main EICAS
 display.
 S 715-123
 (14) Release the first officer's autopilot disconnect switch.
 (a)  Make sure that these occur: 1) Captain's Master Warning light is off. 2) First officer's Master Warning light is off. 3) The AUTOPILOT DISC warning (red) is not shown on the main
 EICAS display.
 S 865-124
 (15)
 Close the 7D13 FLT CONT CMPTR C PWR PWR circuit breakers on the P7 Overhead Circuit Breaker Panel.

 S 865-125

 (16)
 Open the 7D15 FLT CONT CMPTR R PWR circuit breakers on the P7 Overhead Circuit Breaker Panel.

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747-400 MAINTENANCE MANUAL
 S 715-126
 (17) Push and hold the first officer's autopilot disconnect switch.
 (a)  Make sure that these occur: 1) Captain's Master Warning light is on. 2) First officer's Master Warning light is on. 3) The AUTOPILOT DISC warning (red) is shown on the main EICAS
 display.
 S 715-127
 (18) Release the first officer's autopilot disconnect switch.
 (a)  Make sure that these occur: 1) Captain's Master Warning light is off. 2) First officer's Master Warning light is off. 3) The AUTOPILOT DISC warning (red) is not shown on the main
 EICAS display.
 S 865-128
 (19) Close these circuit breakers:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7A3, AURAL WARN L
 2) 7A4, AURAL WARN R
 3) 7D8, FLT CONT CMPTR L PWR
 4) 7D15, FLT CONT CMPTR R PWR
 5) 7E24, AUTO FLT WARN

 J. Autopilot Disconnect Switches Test
 S 745-129
 (1)  Do this task: Ground Test - Autopilot Disconnect Switch.
 K. Go-Around Switches Test
 S 745-130
 (1)  Do this task: Ground Test - Go-Around Switch.
 L. Mode Control Panel Test
 S 745-330
 (1)  Do this task: Ground Test - Mode Control Panel
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747-400 MAINTENANCE MANUAL
 M. Air/Ground Relay Inputs Test
 S 745-064
 (1)  Do this task: Ground Test - Air/Ground Relay
 N. FCC Configuration and Option Test
 S 745-331
 (1)  Do this task: Ground Test - FCC Configuration.
 O. Speed Brake Handle Position Test
 S 745-068
 (1)  Do this check on the position of the speed brake handle:
 NOTE:____Hydraulic power is not necessary for this test. If the hydraulic power is on ,the control surfaces will move.
 (a)  
Push the LSK adjacent to <GROUND TESTS from the CMC MENU page on the CDU.

 (b)  
Push the LSK adjacent to <22 AUTOPILOT FLT DIR from the GROUND TESTS SYSTEMS page on the CDU.

 (c)  
Push the LSK adjacent to <XDUCER OUTPUTS from the GROUND TESTS MENU page on the CDU.

 (d)  
Continue with the instructions on the CDU to get the values for the speed brake position.

 (e)  
Set the speed brake handle to the ARM position.

 (f)  
Write down the values for the position of the speed brake handle:

 L ______ , C ______ , R ______ .

 (g)  
Make sure the three values for the left, center, and right channels are between 0% and 5%.

 S 745-108
 (2)  Do the speed brake transducer test:
 (a)  Set the speed brake handle fully to the down (DN) position.
　
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