(6)  
AMM 31-41-00/501, Engine Indication and Crew Alerting System

 (7)  
AMM 32-09-02/201, Air/Ground Relays

 (8)  
AMM 33-16-00/501, Master Dim and Test

 (9)  
AMM 34-12-00/501, Air Data Computing System

 (10)
 AMM 34-21-00/501, Inertial Reference System

 B.  Access
 (1)  
Location Zones 211/212 Flight Compartment 324 Vertical Stabilizer - Rear Spar to Trailing Edge

 (2)  
Access Panel
 324BL Vertical Stabilizer - Trailing Edge

 C.  Prepare For Removal
 S 844-058
 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
_______ PERSONS AND EQUIPMENT AWAY FROM THE SPOILER PANELS. THE SPOILERS CAN RETRACT QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  Do the deactivation procedure for the spoilers (AMM 27-61-00/201) or move all persons and equipment away from the spoiler panels.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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

757 MAINTENANCE MANUAL
SEE A
ACCESS PANEL, 324BL
3. NUT 2. WASHER 1. BOLT  LINK ASSEMBLY 4. TORQUE TUBE AND 3. NUT 2. WASHER 1. BOLT 
(REF) CONNECTOR ELECTRICAL 
7. WASHER 6. BOLT  (APL RIGHT SIDE, M510) 5. RIGHT YAW DAMPER SERVO 
(APL LEFT SIDE, M509) 5. LEFT YAW DAMPER SERVO 
9. PACKING 8. UNION 10. FILTER 12. PACKING 11. UNION  FWD  (LEFT HYDRAULIC SYSTEM) LEFT SERVO HYDRAULIC PRESSURE LINE (LEFT HYDRAULIC SYSTEM) LEFT SERVO HYDRAULIC RETURN LINE (CENTER HYDRAULIC SYSTEM) RIGHT SERVO HYDRAULIC PRESSURE LINE (CENTER HYDRAULIC SYSTEM) RIGHT SERVO HYDRAULIC RETURN LINE 
YAW DAMPER SERVOS 
A 

Yaw Damper Servo Installation
Figure 401

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

 S 864-001
 (2)  Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
 (a)  
11A18, YAW DAMPER LEFT

 (b)  
11C6, CSEU 1L AC
 or
 FLT CONT ELEC 1L AC

 (c)  
11C7, CSEU 1L DC
 or
 FLT CONT ELEC 1L DC

 (d)  
11C8, CSEU 2L AC
 or
 FLT CONT ELEC 2L AC

 (e)  
11C9, CSEU 2L DC
 or
 FLT CONT ELEC 2L DC

 (f)  
11F34, YAW DAMPER RIGHT

 (g)  
11G17, CSEU 1R AC
 or
 FLT CONT ELEC 1R AC

 (h)  
11G18, CSEU 1R DC
 or
 FLT CONT ELEC 1R DC

 (i)  
11G27, CSEU 2R AC
 or
 FLT CONT ELEC 2R AC

 (j)  
11G28, CSEU 2R DC
 or
 FLT CONT ELEC 2R DC

 S 864-004
 (3)  
Supply electrical power (AMM 24-22-00/201).

 S 864-005

 (4)  
For the left servo, remove pressure from the left hydraulic system (AMM 29-11-00/201).

 S 864-006

 (5)  
For the right servo, remove pressure from the center hydraulic system (AMM 29-11-00/201).

 S 984-007

 (6)  
Make sure the L, C and R FLT CONTROL SHUTOFF switches on panel P61 are in the OFF position.

 S 984-008

 (7)  
Put the C and R STAB TRIM switches on the control stand, P10, in the CUT OUT position.

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