(m)  
Move the POWER, ARM, and EXCITATION switches to ON.

 S 725-010
 (2)  Do the steps that follow to make sure that autopilot hardover operates correctly with auxiliary pitot systems No. 1 and 2 pressurized:
 NOTE: Repeat the test steps below for each of the autopilot
____
 servos.

 (a)  
Cycle the control column full forward, full aft and then back to neutral.

 (b)  
Shake the control column lightly to center the elevator system.

 (c)  
Move the ENGAGE switch to ON.

 (d)  
Move the DIRECTION switch to UP.

 (e)  
Measure the distance that the left elevator trailing edge moved from the neutral position mark on the tape.

 (f)  
Make sure that the distance is between 0.60 and 1.11 inches

 (15.2 to 28.2 mm).
 (g)  
Move the DIRECTION switch to OFF.

 (h)  
Move the ENGAGE switch to OFF.

 (i)  
Cycle the control column full forward and full aft and then back to neutral.

 (j)  
Shake the control column lightly to center the elevator system.

 (k)  
Move the ENGAGE switch to ON.

 (l)  
Move the DIRECTION switch to DOWN.

 (m)  
Measure the distance that the left elevator trailing edge moved from the neutral position mark on the tape.

 (n)  
Make sure that the distance is between 0.70 and 1.10 inches

 (17.8 and 27.9 mm).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-31-00
 ALL  ú ú 10 Page 580S ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (o)  
Move the DIRECTION switch to OFF.

 (p)  
Move the ENGAGE switch to OFF.

 (q)  
Repeat the steps above to test each of the autopilot servos.

 S 865-156
 (3)  
Remove the pressure from auxiliary pitot system No. 1 (AMM 34-11-00/201).

 S 725-011

 (4)  
Do the steps that follow to make sure that autopilot hardover operates correctly with only auxiliary pitot system No. 2 pressurized:

 NOTE: Repeat the test steps below for each of the autopilot
____
 servos.

 (a)  
Cycle the control column full forward and full aft and then back to neutral.

 (b)  
Shake the control column lightly to center the elevator system.

 (c)  
Move the ENGAGE switch to ON.

 (d)  
Move the DIRECTION switch to UP.

 (e)  
Measure the distance that the left elevator trailing edge moved from the neutral position mark on the tape.

 (f)  
Make sure that the distance is between 0.60 and 1.11 inches

 (15.2 to 28.2 mm).
 (g)  
Move the DIRECTION switch to OFF.

 (h)  
Move the ENGAGE switch to OFF.

 (i)  
Cycle the control column full forward and full aft and then back to neutral.

 (j)  
Shake the control column lightly to center the elevator system.

 (k)  
Move the ENGAGE switch to ON.

 (l)  
Move the DIRECTION switch to DOWN.

 (m)  
Measure the distance that the left elevator trailing edge moved from the neutral position mark on the tape.

 (n)  
Make sure that the distance is between 0.70 and 1.10 inches

 (17.8 mm and 27.9 mm).
 (o)  
Move the DIRECTION switch to OFF.

 (p)  
Move the ENGAGE switch to OFF.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-31-00
 ALL  ú ú 10 Page 580T ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

 (q)  Repeat the steps above to test each of the autopilot servos.
 S 865-157
 (5)  
Remove the pressure from auxiliary pitot system No. 2 (AMM 34-11-00/201).

 S 865-389
　
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