(a)
11C12, STAB TRIM SHUTOFF LEFT
(b)
11C13, STAB TRIM SHUTOFF RIGHT
(c)
11H11 or 11C05, STAB TRIM CONT L
(d)
11H20, STAB TRIM CONT R
S 862-008
(6)
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; do the steps that follow to put the stabilizer control system in the correct configuration to remove the component:
(a)
Operate the STAB TRIM levers to the APL NOSE UP and APL NOSE DOWN positions 4 to 5 times.
NOTE: This will remove the remaining pressure in the STCM.
____
(b)
Make sure the STAB TRIM levers are at the neutral position.
(c)
Put a DO-NOT-OPERATE tag on the STAB TRIM levers.
S 862-009
(7) AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; do the steps that follow to put the stabilizer control system in the correct configuration to remove the component:
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A
757 MAINTENANCE MANUAL
(a) Operate the alternate stab trim switches to the APL NOSE UP and APL NOSE DOWN position 4 to 5 times.
NOTE: This will remove the remaining pressure in the STCM.
____
(b)
Open this circuit breaker on the P11 panel and attach a DO-NOT-CLOSE tag: 1) 11B19, ALT STAB TRIM
(c)
Put a DO-NOT-OPERATE tag on the alternate stab trim switches.
S 012-010
WARNING: STAY OFF THE SERVICE ACCESS DOOR, 311AL AND THE ELEVATOR
_______ CONTROL ACCESS DOOR, 313AL. YOUR WEIGHT CAN RELEASE THE SPRING-LOADED LATCHES ON THE DOOR. IF YOU FALL THROUGH THE DOOR, INJURIES CAN OCCUR.
(8)
Open the access door for the forward stabilizer compartment, 311AL (Ref 06-42-00).
F.
Remove the STCM (Fig. 201)
S 492-013
(1)
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND;
install rig pins E/ST1 and E/ST2.
S 032-014
(2)
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; disconnect the control rods from the servo levers on the STCM.
S 032-015
(3)
Disconnect the electrical connectors.
S 032-016
(4)
Disconnect the hydraulic lines.
(5)
Put plugs in the hydraulic lines and caps on the ports.
S 032-018
(6)
Hold the STCM and remove the bolts and washers that attach the it to the airplane structure.
(7)
Remove the STCM.
S 032-017
S 022-019
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757 MAINTENANCE MANUAL
G. Remove the Solenoid Valve (Fig. 201)
S 032-020
(1)
Remove the bolts and washers that attach the solenoid valve to the STCM.
S 022-021
(2)
Remove the solenoid valve and the gasket plate from the STCM.
S 032-022
(3)
Remove and discard the gasket plate and the o-ring from the solenoid valve.
TASK 27-41-05-422-023
3. Install the Stabilizer Trim Control Modules (STCMs) and the Solenoid____________________________________________________________________ Valves______
A. General
(1) This task contains two installation procedures, one to install the STCMs, and one to install the solenoid valves on the STCM. Because this task contains two procedures, do only the applicable group of steps.
To start one of these procedures, do the group of steps that is necessary to install the components. Then, do the "Put the Airplane Back to Its Usual Condition" group of steps.
B. Consumable Materials
(1)
D00293 Skydrol Assembly Lube - MCS 352
(2)
D00153 Hydraulic Fluid, Fire Resistant -BMS 3-11
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