S 034-012
 (3)  
Remove the rivets that connect the index plate to the airplane fuselage.

 S 024-013

 (4)  
Remove the index plate.

 TASK 27-31-02-424-014
 3. Install the Index Plate
_______________________
 A. General
 (1)
You will have to use two rivets (NAS1739E5-2) in this task.

 B.
Consumable Materials

 (1)  
A00247 Sealant, Chromate Type - BMS 5-95

 C.
References

 (1)  
06-42-00/201, Empennage Access Doors and Panels

 (2)  
24-22-00/201, Electrical Power - Control

 (3)  
29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 D.
Access

 (1)  
Location Zones 211/212 Control Cabin 311/312 Area Aft of Pressure Bulkhead to BS 1787.45 315/316 Auxiliary Power Unit Compartment

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A
757
MAINTENANCE MANUAL

 (2)  
Access Panels
 311AL Forward Stabilizer Compartment
 315AL Auxiliary Power Unit
 316AR Auxiliary Power Unit

 E.
Install the Index Plate (Fig. 401)

 S 864-037
 (1)
Align the new index plate with the marks made on the fuselage.

 (a)  
Make sure the rivot holes in the fuselage align with the holes in the index plate.

 NOTE: If the rivot holes in the fuselage do not align with the
____ holes in the index plate, new holes must be drilled in index plate using the old plate as a guide.
 S 624-020
 (2)  
Apply a layer of sealant between the index plate and the airplane fuselage.

 S 424-021

 (3)
Hold the index plate in its correct position and use NAS1739E5-2 rivets to install the index plate to the airplane fuselage.

 S 864-016

 (4)  
Do the steps that follow to use the middle PCA to move the elevator to its neutral position:

 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.
 (a)  
Pressurize the left hydraulic system (Ref 29-11-00).

 (b)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the overhead panel, P11: 1) 11H17, FLT CONT SHUTOFF TAIL LEFT

 (c)  
Put the L FLT CONTROL SHUTOFF switch on the right side panel, P61, to the ON position.

 (d)  
Move the control column forward and aft 4 to 5 times quickly.

 NOTE: Move the control column less than 1 inch (25.4 mm) from
____
 the neutral position.

 (e)  Let the control column go to the neutral position.
 S 824-017
 (5)  Put a straight edge on the top surface of the elevator trailing edge against the airplane fuselage.
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A

757 MAINTENANCE MANUAL
 S 824-018
 (6)  
Make sure the locating hole on the index plate aligns , by less than +/- 0.05 inch (+/- 1.27 mm), with the lower side of the straight edge.

 F.
Put the Airplane Back to Its Usual Condition

 S 864-022
 (1)  
Remove the power from the left, right, and center hydraulic systems (Ref 29-11-00).

 S 864-023

 (2)
Remove electrical power if it is not necessary (Ref 24-22-00).

 S 864-024

 (3)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:

 (a)  
11B19, STAB TRIM ALT (IF INSTALLED)

 (b)  
11C12, STAB TRIM SHUTOFF LEFT
　
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