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 (403.6 +/- 0.25 mm) (6 units of stabilizer trim). Correct the rigging if it is necessary (Ref 27-31-00/501).
 (h)  Set the ratio changer module to the test (or high speed) position. Trim the rudder trailing edge until it aligns with the neutral position on the index plate (use a tolerance of
 0.05 inch). Set the ratio changer module to normal and make sure that the rudder trailing edge does not move (use a tolerance of 0.15 inch (3.81 mm)) (Ref 27-21-00/501).
 F. Find the Shim Values (Fig. 501)
 S 225-003
 (1)  
Write the aileron trim necessary during flight. Circle LLW when it is necessary to add trim to lower the left wing (right wing was heav y). Cirlce LRW when it is necessary to add trim to lower the right wing (left wing was heavy).

 S 935-004

 (2)  
Use the chart and find the necessary shim value.

 S 845-005

 (3)  
If possible, install 1/2 of the total shim value on one wing and remove 1/2 the shim value from the other. If the problem was LLW then a shim is added to the left wing and removed from the right wing. If the problem was LRW then a shim is removed from the left wing and added to the right wing.

 NOTE: The thickness of the shim material removed from one wing
____ added to the thickness installed on the other wing must equal the total shim value. The maximum shim thickness permitted is .35 inch (8.9 mm). This includes every shim that has been installed.
 G. Prepare for Adjustment
 S 865-006
 WARNING: MOVE ALL PERSONS AND EQUIPMENT AWAY FROM THE CONTROL SURFACES
_______ BEFORE YOU SUPPLY HYDRAULIC POWER. THE CONTROL SURFACES ARE FULLY POWERED AND CAN CAUSE INJURY OR DAMAGE.
 (1)
Supply hydraulic power to the left hydraulic system (Ref 29-11-00).

 (2)  
Move the flap lever to 30 unit detent.

 (3)
Remove the power from the left hydraulic system (Ref 29-11-00).

 S 825-007
 S 865-008
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A

757
MAINTENANCE MANUAL

NECESSARY SHIM THICKNESS: 0.211 INCHES/UNIT TRIM
LLWAILERON TRIM ERROR (UNITS) __________ LRW
TOTAL SHIM CORRECTION (INCHES) ____________ ADDSHIM-CORRECTION TO RIGHT-WING (INCHES) __________
REMOVE ADDSHIM-CORRECTION TO LEFT-WING (INCHES) __________ REMOVE
NOTE: ADD THE SHIM-CORRECTION TO RIGHT-WING TO THE SHIM-CORRECTION TO LEFT-WING TO GET THE TOTAL SHIM CORRECTION
IF POSSIBLE, INSTALL 1/2 THE TOTAL SHIM VALUE ON ONE WING AND REMOVE 1/2 THE SHIM VALUE FROM THE OTHER
Lateral Trim Adjustments
Figure 501

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

757 MAINTENANCE MANUAL
 S 865-009
 (4)  
Open these circuit breakers on the main power distribution panel, P6, and attach DO-NOT-CLOSE tags:

 (a)  
6D20, ALTN SLAT PWR

 (b)  
6D23, ALTN FLAP PWR

 S 865-010
 (5)  
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:

 (a)  
11B18, WARN ELEX B

 (b)  
11D31, HYDRAULICS PTU CONT

 (c)  
11H23, FLAP/SLAT ALTN DR SHUTOFF ARM

 (d)  
11J18, FLAP LOAD RELIEF

 (e)  
11J33, WARN ELEX A

 S 025-011
 (6)  
Remove the flap-track aft fairings (Ref 27-51-31).

 S 435-012

 (7)  
Install rig pins TE-4 and TE-5 in the bellcrank (Fig. 502).

 H.
Procedure

 S 825-013
 (1)  
If the problem is LLW trim (right wing heavy), do the steps that follow:

 (a)  
Remove the bolts that attach the outboard flap to the outboard flap carriages (Fig. 502).

 (b)  
Remove shims from the right outboard flap or add shims to the left outboard flap (or do both) to get the necessary shim thickness change. Shims must be added or removed equally from both the carriages of a flap.
　
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