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 CAUTION: DO NOT USE METAL TOOLS TO REMOVE THE RETAINERS. DAMAGE TO_______
 THE UPPER GIMBAL AND THE RETAINER FLANGES CAN OCCUR.
 (c) Use a hardwood dowel to remove the retainers and the safety shaft from the lower gimbal.
 S 024-018
 (5) Turn the actuator forward to make sure the upper gimbal will not touch the supports for the stabilizer ballscrew. Move the trolley if it is necessary.
 S 024-019
 (6) Lift the stabilizer ballscrew actuator away from the lower gimbal attachment lugs.
 S 024-020
 (7) Move the actuator to a position above the access door, 311AL, and lower it through the door.
 TASK 27-41-10-424-021
 3.  Install the Stabilizer Ballscrew Actuator_________________________________________
 A. Equipment (1) Removal/Installation Equipment - Horizontal Stabilizer Jackscrew - B27011-79
 B. Consumable Materials
 ú ú  (1) D00633 Grease, Corrosion Preventive - BMS 3-33 (Recommended)(2) D00013 Grease - MIL-PRF-23827 (Alternative) (3) D00153 Fluid - Hydraulic BMS 3-11 C. References
 ú ú ú ú ú ú  (1) AMM 06-42-00/201, Empennage Access Panels and Doors(2) AMM 12-21-05/301, Horizontal Stabilizer Trim Control System(3) AMM 24-22-00/201, Electrical Power - Control(4) AMM 27-41-00/501, Horizontal Stabilizer Trim Control System(5) AMM 27-41-14/601, Stabilizer Trim Upper and Lower Gimbal(6) AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-41-10
 ALL  ú ú 01.1 Page 410 ú Sep 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 D. Access
 (1)  
Location Zones 311/312 Area Aft of the Pressure Bulkhead to BS 1787.45

 (2)  
Access Panel
 311AL Forward Stabilizer Compartment

 E.
Prepare for the Installation (Fig. 402)

 S 224-022
 (1) Make sure that the stabilizer ballscrew actuator and the attachment ú locations are in the permitted wear limits (AMM 27-41-14/601).
 S 224-023
 (2)  Turn the upper gimbal and ballnut until the Dimension B on the stabilizer ballscrew actuator is 19.07 | 0.50 inches
 (484.4 +/- 12.7 mm) (Fig. 403).
 S 034-024
 (3)
Do the steps that follow to remove the upper gimbal retainers:

 (a)  
Remove the nuts and bolts from the left and right retainers.

 (b)  
Remove the left and right retainers.

 S 034-025
 (4)  
Do the steps that follow to remove the safety shaft and retainers from the lower gimbal:

 (a)  
Remove the nuts and bolts from the safety shaft.

 (b)  
Remove the safety shaft.

 (c)  
Remove the nuts and bolts from the left and right retainers.

 (d)  
Remove the left and right retainers.

 (5)  
Attach the lift bracket to the stabilizer ballscrew.

 S 424-027

 (6)  
Use the fishpole hoist to lift the stabilizer ballscrew actuator through the access door, 311AL.

 S 494-026
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-41-10
 ALL  ú ú 01.1 Page 411 ú Sep 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 S 424-028
 (7)  
Move the lower gimbal to its correct position on the stabilizer attachment lugs.

 F.
Install the Stabilizer Ballscrew Actuator (Fig. 402)

 S 424-029
 (1)  
Do the steps that follow to attach the lower gimbal:

 (a)  
Lightly apply grease to these surfaces: 1) Bearing surfaces of the lower gimbal attachment lugs 2) Outer and inner surfaces of the retainers 3) outer surface of safety shaft.

 (b)  
Align the lower gimbal with the attachment lugs and install the left and right retainers with the grease fittings down.

 (c)  
Install the bolts, washers, and nuts that hold the retainers to the lower gimbal.
　
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