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757
MAINTENANCE MANUAL
S 015-115
WARNING:_______ STAY OFF THE SERVICE ACCESS DOOR, 311AL, AND THE ACCESS DOOR
FOR THE CONTROLS BAY, 313AL. YOUR WEIGHT CAN CAUSE THE
SPRING-LOADED LATCHES TO RELEASE. IF YOU FALL THROUGH THE
DOOR, INJURY CAN OCCUR.
(2)
Open the forward stabilizer compartment access door, 311AL (AMM 06-42-00/201).
S 865-077
(3)
Make sure that these circuit breakers on the overhead panel, P11, are closed:
(a)
11B19, STAB TRIM ALT (IF INSTALLED)
(b)
11C12, STAB TRIM SHUTOFF LEFT
(c)
11C13, STAB TRIM SHUTOFF RIGHT
(d)
11H10, STAB TRIM POS IND LEFT or STAB TRIM LEFT POS IND
(e)
11H19, STAB TRIM POS IND RIGHT
S 215-078
(4) Make sure that the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the control stand panel, P10, are in NORM.
S 865-079
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. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(5)
Pressurize the right and center hydraulic systems (AMM 29-11-00/201).
S 865-080
(6)
Move the horizontal stabilizer such that Dimension B on the stabilizer trim ballscrew actuator is 19.07 | 0.01 inches
(484.4 +/- 0.25 mm) (neutral position).
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757 MAINTENANCE MANUAL
S 215-135
(7)
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND;
make sure the STAB TRIM levers are in the neutral position.
S 215-136
(8)
AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; make sure the alternate stab trim switches are in the neutral position.
S 215-082
(9)
Make sure that the stabilizer trim position indicators show that the stabilizer is at neutral (4 units of trim).
F.
Stabilizer Trim Position Indicating System Test (Fig. 501)
S 715-153
(1) You must use the "B" dimension when it is specified in the procedures. You cannot use the Units of Trim value in place of the "B" dimension. ~............................................................ | UNITS OF TRIM | "B" DIMENSION (INCHES) | .............................................................. | 0.0 | 25.40 | .............................................................. | 0.5 | 24.61 | .............................................................. | 1.0 | 23.82 | .............................................................. | 1.5 | 23.03 | .............................................................. | 2.0 | 22.24 | .............................................................. | 2.5 | 21.45 | .............................................................. | 3.0 | 20.66 | .............................................................. | 3.5 | 19.86 | .............................................................. | 4.0 | 19.07 | .............................................................. | 4.5 | 18.28 |
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757
MAINTENANCE MANUAL
~............................................................ | UNITS OF TRIM | "B" DIMENSION (INCHES) | .............................................................. | 5.0 | 17.48 | .............................................................. | 5.5 | 16.69 | .............................................................. | 6.0 | 15.90 | .............................................................. | 6.5 | 15.10 | .............................................................. | 7.0 | 14.31 | .............................................................. | 7.5 | 13.51 | .............................................................. | 8.0 | 12.72 | .............................................................. | 8.5 | 11.93 | .............................................................. | 9.0 | 11.13 | .............................................................. | 9.5 | 10.34 | | 10.0 | 9.55 | .............................................................. | 10.5 | 8.75 | .............................................................. | 11.0 | 7.96 | .............................................................. | 11.5 | 7.17 | .............................................................. | 12.0 | 6.38 | .............................................................. | 12.5 | 5.59 | .............................................................. | 13.0 | 4.80 | .............................................................. | 13.5 | 4.01 | .............................................................. | 14.0 | 3.22 | .............................................................. | 14.5 | 2.44 | .............................................................. | 15.0 | 1.66 | .............................................................. | 15.5 | 0.87 | 2..........................….................................1
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