22-10-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 F. Test Autopilot Engage/Disengage Operation.
 S 865-020
 (1)  
Engage the left autopilot in CMD.

 S 755-021

 (2)  
Make sure that HDG HOLD and V/S appear on the two EADIs.

 S 865-022

 (3)  
Push the HDG SEL control on the MCP.

 S 755-023

 (4)  
Make sure the HDG HOLD indication changed to HDG SEL on the two EADIs.

 S 975-024

 (5)  
Write on paper the heading that shows in the HDG display of the MCP at this time. This is the initial heading.

 S 865-025

 (6)  
Turn the HDG SEL control to set a heading that is 100 degrees to the left of the initial heading.

 S 755-026

 (7)  
Make sure the control wheel moves CCW and the ailerons move in a left-wing-down direction.

 S 865-027

 (8)  
Set a heading that is 100 degrees to the right of the initial heading.

 S 755-028

 (9)  
Make sure the control wheel moves CW and the ailerons move in a right-wing-down direction.

 (10)
 Set HDG display to initial heading.

 S 865-029
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 22-10-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 865-030
 (11)
 Turn VERT SPD control to set -1000 FPM in the VERT SPD display of the MCP.

 S 755-031

 (12)
 Make sure the column moves forward and the elevator moves in a down direction in less than 15 seconds.

 S 865-032

 (13)
 Set +1000 FPM in VERT SPD display.

 S 755-033

 (14)
 Make sure the column moves aft and the elevator moves in an up direction in less than 15 seconds.

 S 865-034

 (15)
 Push the captain's A/P Disengage switch to disengage the autopilot.

 S 865-035

 (16)
 Push the captain's A/P Disengage switch again to cancel the disengage warning.

 S 865-154

 (17)
 Turn the FD OFF and then ON again.

 S 715-036

 (18)
 Do the above steps again to test autopilot engage/disengage operation for the center and right autopilots.

 G. Put the Airplane Back to Its Usual Condition
 NOTE: Do not put the airplane back to its usual condition if AFDS
____
 System Test is to be done.

 S 865-037
 (1) Set IRS to off if it is not necessary (Ref 34-21-00).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 865-038
 (2)  
Remove the pressure from the left, center, and right hydraulic systems if it is not necessary (Ref 29-11-00).

 S 865-039

 (3)
Remove electrical power if it is not necessary (Ref. 24-22-00).

 TASK 22-10-00-735-040
 3.  AFDS System Test________________
 A. General
 (1)  
This task uses the Maintenance Control Display Panel (MCDP) Ground Test procedures to test the AFDS interfaces and autoland function.

 (2)  
The MCDP is installed in the main equipment center on the E1 rack. The MCDP control switches and display are found on the front of the MCDP. If a remote MCDP control unit is not to be used, two persons are necessary to do this system test. One person will be in the the main equipment center and one person will be in the control cabin.

 (3)  
A connection is in the control cabin for a hand-held MCDP remote control unit. This lets MCDP Ground Tests be done from the control cabin. The MCDP data shows on the bottom EICAS display. Instructions for use of the MCDP are found in the Autoflight BITE -Maintenance Practices (Ref 22-00-02).
　
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