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A

757
MAINTENANCE MANUAL

 B. Access
 (1)  
Location Zones
 211/212 Control Cabin
 311/312 Area Aft of Pressure Bulkhead to BS 1787.45

 (2)  
Access Panel
 311AL Forward Stabilizer Compartment

 C.
Install the Brake Pressure Switch (Fig. 401)

 S 434-022
 (1)  
Install a new o-ring and two backup rings on the brake pressure switch.

 S 434-023

 (2)  
Remove the cap from the port on the STCM.

 S 424-024

 (3)  
Install the brake pressure switch and tighten it at the wrench flats as follows:

 (a)  
Tighten the brake pressure switch at the wrench flats 300 to 350 pound-inches (33.9-39.5 Nm).

 S 434-025
 (4)
Connect the electrical connector to the brake pressure switch.

 S 094-027

 (5)  
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND;
 remove rig pins E/ST1 and E/ST2, if they were installed.

 S 864-028

 (6)  
Put the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the control stand panel, P10, to the NORM position.

 S 864-029

 (7)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the overhead panel, P11:

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

 (b)  
11C12, STAB TRIM SHUTOFF LEFT

 (c)  
11C13, STAB TRIM SHUTOFF RIGHT

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

 (e)  
11H20, STAB TRIM CONT R

 S 094-031
 (8)  AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; remove the DO-NOT-OPERATE tags from the STAB TRIM levers and from the control wheel switches.
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A

757 MAINTENANCE MANUAL
 S 094-032
 (9)  
AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; remove the DO-NOT-OPERATE tags from the alternate stab trim switches and from the control wheel switches.

 S 714-033

 (10)
 Do the Test of the Stabilizer Trim/Elevator Asymmetry Limit Module (SAM) (FIM 27-09-00).

 (a)  
Make sure the STCM fault balls do not set during the left and right SAM tests.

 NOTE: Do all of the steps as if you replaced the left and
____
 right SAMs.

 (b)  
Make sure there are no hydraulic leaks at the brake pressure switch.

 D.
Put the Airplane Back to Its Usual Condition

 S 214-034
 (1)  
Make sure the power is removed from the left, right, and center hydraulic systems (AMM 29-11-00/201).

 S 864-035

 (2)
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 414-036

 (3)  
Close the access door for the forward stabilizer compartment, 311AL (AMM 06-42-00).

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757 MAINTENANCE MANUAL
 STABILIZER TRIM BALLSCREW ACTUATOR - REMOVAL/INSTALLATION
_________________________________________________________
General
_______
 A.  This procedure contains steps to remove and install the stabilizer ballscrew actuator.
 TASK 27-41-10-024-001Remove the Stabilizer Ballscrew Actuator
________________________________________
 A.  Equipment
 (1)  
Removal/Installation Equipment - Horizontal
 Stabilizer Jackscrew - B27011-79

 B.  
　
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