(a)  
Make sure the stabilizer does not move.

 S 864-030
 (9)  
Release the control wheel switches, then release the BRAKE BYPASS valve button.

 S 864-031

 (10)
 Move the control wheel switches through full travel and do the check that follows:

 (a)  
Make sure the stabilizer operates correctly.

 S 214-032
 (11) Make sure there is no leakage at the hydraulic connections on the secondary brake.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757 MAINTENANCE MANUAL
 F. Put the Airplane Back to Its Usual Condition
 S 864-033
 (1)  
Move the stabilizer to its neutral position.

 S 864-034

 (2)  
Remove the power from the right and center hydraulic systems (Ref 29-11-00).

 S 864-035

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

 S 414-036

 (4)  
Close the access door for the forward stabilizer compartment, 311AL (Ref 06-42-00).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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1.

2.

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757 MAINTENANCE MANUAL
 STABILIZER TRIM UPPER AND LOWER GIMBAL - INSPECTION/CHECK
_________________________________________________________
General
_______
 A.  This procedure contains steps to inspect the stabilizer trim upper and lower gimbals. There is a task which contains the wear limit data for the stabilizer trim upper and lower gimbal wear limits.
 TASK 27-41-14-216-001Inspect the Stabilizer Trim Upper and Lower Gimbals
___________________________________________________
 A.  Equipment
 (1)  
Borescope - Commercially Available

 (2)  
Inspection Mirrors - Commercially Available

 (3)  
Horizontal Stabilizer Jackscrew Adjustable Beam
 Assembly - B27011-79

 B.  
Consumable Materials

(1)  
D00633 Grease, Corrosion Preventive - BMS 3-33 (Recommended)

(2)  
D00013 Grease - MIL-PRF-23827 (Alternative)

 C.  
References

(1)  
AMM 06-42-00/201, Empennage Access Panels and Doors

(2)  
AMM 12-21-05/301, Horizontal Stabilizer Control System

(3)  
AMM 27-41-00/501, Horizontal Stabilizer Trim Control System

(4)  
AMM 29-11-00/201, Main (Left, Right, Center) Hydraulic Systems

 D.  
Access

 (1)  
Location Zones 311 Area Aft of Pressure Bulkhead to BS 1787.45 (Left)

 (2)  
Access Panels
 311AL Horizontal Stabilizer Access Door

 E.  
Prepare for Inspection/Check

 S 866-004
 (1)  
Remove the pressure from the right and center hydraulic systems(AMM 29-11-00/201).

 S 866-005

 (2)  
Place R and C STAB TRIM SHUTOFF valve switches on control stand panel, P10, to CUTOUT.

 S 866-006

 (3)  
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:

 (a)  
11B19, STAB TRIM ALT (IF INSTALLED)

 (b)  
11C12, STAB TRIM SHUTOFF LEFT

 (c)  
11C13, STAB TRIM SHUTOFF RIGHT

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