NOTE: THE RIGHT HYDRAULIC SYSTEM SUPPLIES PRESSURE TO THE RIGHT STCM, THE CENTER HYDRAULIC SYSTEM SUPPLIES PRESSURE TO THE LEFT STCM.
STABILIZER TRIM CONTROL MODULES (STCMs)
A
Stabilizer Trim Control Module Installation
Figure 201 (Sheet 1)
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A
757
MAINTENANCE MANUAL
STABILIZER TRIM
CONTROL MODULES
(STCMs)
SEE C PRESSURE LINE TO THE ELEVATOR FEEL COMPUTER RETURN LINE PRESSURE LINE
BOLT WASHER (4 LOCATIONS)
ELECTRICAL ELECTRICALCONNECTOR CONNECTOR
ELECTRICAL CONNECTOR
PRESSURE LINE FOR BRAKE RELEASE BOLT RETURN LINE
SOLENOID
PRESSURE LINE FOR
PRESSURE LINE FORVALVE
AIRPLANE NOSE UP
AIRPLANE NOSE DOWN(8 LOCATIONS)
MOVEMENT
MOVEMENT ELECTRICAL CONNECTOR
STABILIZER TRIM CONTROL MODULES (STCMs)
C
NOTE: THE RIGHT HYDRAULIC SYSTEM SUPPLIES PRESSURE TO THE RIGHT STCM, THE CENTER HYDRAULIC SYSTEM SUPPLIES PRESSURE TO THE LEFT STCM.
Stabilizer Trim Control Module Installation
Figure 201 (Sheet 2)
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SWITCHES ON THE CONTROL STAND ú ú 02 Page 203 ú Jun 20/91
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A
757
MAINTENANCE MANUAL
STABILIZER BALLSCREW ACTUATOR
STABILIZER BALLSCREW ACTUATOR
A
1 THE GAGE ASSEMBLY CAN BE USED TO ACCURATELY SET THE STABILIZER DIMENSION B TO 19.07 |0.01 INCHES.
TO USE, PUT THE GAGE ASSEMBLY AGAINST THE
BALLSCREW SUCH THAT THE LOWER BOLTHEAD IS
ON THE SHOULDER OF THE LOWER STOP. MAKE
SURE THAT THE FEELER BLADE CANNOT BE PUT
BETWEEN THE GAGE ASSEMBLY UPPER BOLTHEAD
AND THE SHOULDER OF THE UPPER STOP. MAKE
SURE THE SHOULDER OF THE UPPER STOP DOES
NOT TOUCH THE UPPER BOLTHEAD.
Measurement of Stabilizer Dimension B
Figure 202
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757 MAINTENANCE MANUAL
(2)
Access Panel
311AL Forward Stabilizer Compartment
E.
Prepare for the Removal
S 862-002
(1)
Supply power to the right and center hydraulic systems
(Ref 29-11-00).
S 862-003
(2)
Move the stabilizer until Dimension B on the stabilizer ballscrew actuator is 19.07 | 0.01 inches (484.4 +/- 0.25 mm) (Fig. 202).
S 862-004
(3)
Remove the power from the right and center hydraulic systems (Ref 29-11-00).
S 862-005
(4)
Put the RIGHT and CENTER STAB TRIM CUTOUT switches on the control stand panel, P10, to the CUTOUT position.
S 862-006
(5)
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
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