S 865-128

 (4)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:

 (a)  
11B19, STAB TRIM ALT

 (b)  
11C12, STAB TRIM SHUTOFF LEFT

 (c)  
11C13, STAB TRIM SHUTOFF RIGHT

 S 865-129
 (5)  
Put the RIGHT and CENTER STAB TRIM SHUTOFF switches on the P10 panel to the NORM position.

 S 865-130

 (6)  
Move the alternate stab trim switches forward until the stabilizer stops.

 (a)  
Make sure that the stabilizer ballscrew actuator upper stop surfaces do not hit each other.

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757 MAINTENANCE MANUAL
 (b)  Make sure Dimension B on the stabilizer ballscrew actuator is
 24.86 to 25.46 inches (631.4-646.6 mm).
 S 865-131
 (7)  
Move the alternate stab trim switches aft until the stabilizer stops.

 (a)  
Make sure the stabilizer ballscrew actuator surfaces do not hit each other.

 (b)  
Make sure Dimension B on the stabilizer ballscrew actuator is

 0.80 to 1.40 inches (20-35 mm).
 I. Put the Airplane Back to Its Usual Condition
 S 865-069
 (1)
Remove the power from the right hydraulic system (Ref 29-11-00).

 S 865-132

 (2)  
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:

 (a)  
11C12, STAB TRIM SHUTOFF LEFT

 (b)  
11H11 or 11C05, STAB TRIM CONT L

 (c)  
11H20, STAB TRIM CONT R

 S 865-134
 (3)  
AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:

 (a)  
11H11 or 11C05, STAB TRIM CONT L

 (b)  
11H20, STAB TRIM CONT R

 S 865-133
 (4)  
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; put the CENTER STAB TRIM SHUTOFF valve switch on the P10 panel to the NORM position.

 (5)
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 865-072
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 S 415-073
 (6)  Close the forward stabilizer compartment access door, 311AL (AMM 06-42-00/201).
 TASK 27-48-00-735-074
 5.  Stabilizer Trim Position Indicating System - System Test________________________________________________________
 A. General
 (1)  
This test makes sure that the stabilizer trim position indicating system operates correctly.

 B.
Equipment

 (1)  
Gage Assembly - B27039-2 (Part of Elevator and Stabilizer Rigging Equipment, B27039-1)

 (2)  
Rig Pins from Set B20003-XX (AMM 20-10-24/201):

 (a)  
E/ST1 - P/N B20003-21

 (b)  
E/ST3 - P/N B20003-21

 (c)  
E/ST4 - P/N B20003-21

 (d)  
E/ST5 - P/N B20003-21

 (3)  
Gage Assembly - B27039-2 (Part of Elevator and Stabilizer Rigging Equipment, B27039-1)

 C.
References

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

 (2)  
AMM 24-22-00/201, Electrical Power - Control

 (3)  
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System

 D.
Access

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

 (2)  
Access Panel 311AL Forward Stabilizer Compartment Access Door

 E.
Prepare for Test

 (1)  
Supply electrical power (AMM 24-22-00/201).

　
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