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757 MAINTENANCE MANUAL
S 222-043
(5)
If the rig pins cannot be freely installed, make sure the condition that follows is correct:
(a)
The servo levers on each STCM are no more than 0.03 inch
(0.76 mm) away from the index marks on the lever stop plate.
S 832-044
(6) If the above condition is correct, but the rig pins cannot be freely installed, the adjustment is satisfactory.
NOTE: Centering springs move the levers which cause the linkage to
____
move when a rig pin is removed.
S 092-045
(7)
Remove rig pins E/ST1 and E/ST2.
H.
Test for the STCM
S 862-046
(1)
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 862-047
(2) Put the RIGHT and CENTER STAB TRIM CUTOUT switches on the control stand panel, P10, to the NORM position.
S 862-048
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(3)
Pressurize the right and center hydraulic systems (Ref 29-11-00).
(4)
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND;
S 712-050
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757 MAINTENANCE MANUAL
do the tests that follow:
(a)
Manual-Mechanical Stabilizer Trim Control Test (AMM 27-41-00/501).
(b)
Manual Override Operation Test (27-41-00/501).
(c)
Stabilizer Trim Shutoff Switches Test (AMM 27-41-00/501).
(d)
Stabilizer Trim Shutoff Switches Test (AMM 27-41-00/501).
(e)
Stabilizer Trim Secondary Brake Test (AMM 27-41-00/501).
S 712-051
(5)
AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; do the tests that follow:
(a)
Alternate-Electrical Operation Test (AMM 27-41-00/501).
(b)
Alternate-Electric Trim Authority Test (AMM 27-41-00/501).
(c)
Stabilizer Trim Shutoff Switches Test (AMM 27-41-00/501).
(d)
Stabilizer Trim Secondary Brake Test (AMM 27-41-00/501).
I.
Put the Airplane Back to Its Usual Condition
S 862-052
(1)
Remove the power from the right and center hydraulic systems (Ref 29-11-00).
S 862-053
(2)
Remove electrical power if it is not necessary (Ref 24-22-00).
S 412-054
(3)
Close the access door for the forward stabilizer compartment, 311AL (Ref 06-42-00).
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757
MAINTENANCE MANUAL
STABILIZER TRIM CONTROL MODULE BRAKE PRESSURE SWITCH - REMOVAL/INSTALLATION
___________________________________________________________________________
1. General
_______
A. This procedure contains steps to remove and install the brake pressure switch on the stabilizer trim control modules (STCMs). The steps to remove and install the brake pressure switch are the same for the left and right STCMs.
NOTE: The right hydraulic system supplies pressure to the right STCM,
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