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A
757
MAINTENANCE MANUAL
INDEX PLATE SEE
ELEVATOR
TOP EDGE
LOCATING HOLE ELEVATOR ADJUSTMENT POSITION (1 DEGREE DOWN FROM THE NEUTRAL/FAIRED POSITION)
BOTTOM EDGE
INDEX PLATE
RIVET - NAS1739E5-2 (2 LOCATIONS)
THE MARKS ARE
0.05 INCH (1.27 mm) APART
FWD
Elevator Index Plate Installation
Figure 401
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MAINTENANCE MANUAL
STABILIZER BALLSCREW ACTUATOR
A
1 TO USE THE GAGE ASSEMBLY TO SET DIMENSION B TO
15.89 |0.01 INCHES (403.60 |0.25 mm), DO THE
STEPS THAT FOLLOW:
1.
PUT THE GAGE ASSEMBLY AGAINST THE BALLSCREW
SO THAT THE BOLT HEADS ARE ON THE SHOULDERS
OF THE UPPER AND LOWER STOPS
2.
MAKE SURE THAT THE FEELER BLADE CAN BE PUT
BETWEEN THE BOLT HEAD OF THE GAGE ASSEMBLY AND
ON THE SHOULDER OF THE UPPER STOP
(THIS WILL PREVENT PRELOADING)
Measurement of Stabilizer Dimension B Figure 402
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MAINTENANCE MANUAL
S 014-004
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.
(3)
Open the access door for the forward stabilizer compartment, 311AL (Ref 06-42-00).
S 864-005
(4)
Move the horizontal stabilizer until Dimension B on the stabilizer ballscrew actuator is 15.89 | 0.01 inches
(403.6 +/- 0.25 centimeters) (6 units of trim) (Fig. 402).
S 864-006
(5)
Put the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the control stand panel, P10, to the CUTOUT position.
S 864-007
(6)
Put the L, R, and C FLT CONTROL SHUTOFF switches on the right side panel, P61, to the OFF position.
S 864-008
(7)
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
(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)
11H17, FLT CONT SHUTOFF TAIL LEFT
(f)
11H18, FLT CONT SHUTOFF TAIL CTR
(g)
11H20, STAB TRIM CONT R
(h)
11H28, FLT CONT SHUTOFF TAIL RIGHT
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757 MAINTENANCE MANUAL
S 864-009
(8)
Remove the power from the right and center hydraulic systems (Ref 29-11-00).
S 014-010
(9)
Open the access doors for the auxiliary power unit, 315AL and 316AR, for access to the index plate rivets (Ref 06-42-00).
E.
Remove the Index Plate (Fig. 401)
S 984-011
(1)
Push the control columns full forward and turn the elevator trailing edge down and away from the index plate.
S 934-035
(2)
Mark the position of the index plate onto the airplane fuselage.
NOTE: The new index plate will need to be installed in the same
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