757
MAINTENANCE MANUAL

AFT QUADRANTS AND ELEVATOR PCA'S
SEE A
INPUT CONTROL ROD
RIGHT ELEVATOR FOR THE RIGHT PCA
POSITION INDICATOR ELEVATOR PCA'S
OUTPUT CONTROL ROD FOR THE RIGHT AFT QUADRANT SEE B
OUTPUT CONTROL ROD FOR THE LEFT AFT QUADRANT
INPUT CONTROL ROD
FOR THE LEFT PCA LEFT ELEVATOR POSITION INDICATOR
ELEVATOR PCA'S
SEE B
FWD
AFT QUADRANTS AND ELEVATOR PCA'S
A
MIDDLE PCA INPUT CONTROL RODSTABILIZER SEE C FOR THE PCAREAR SPAR TO AFT QUADRANTS
OUTBOARD  CENTERING  INBOARD  POGO ROD 
ELEVATOR PCA  SPRING (2 LOCATIONS)  PCA  SEE (3 LOCATIONS) D  FWD 
FRONT SPAR 

INBD ELEVATOR PCA'S (LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE)
B

Elevator PCA Adjustment
Figure 403 (Sheet 1)

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A
757
MAINTENANCE MANUAL

MIDDLE PCA
(LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE)

POGO ROD

Elevator PCA Adjustment
Figure 403 (Sheet 2)

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A
757 MAINTENANCE MANUAL
 S 864-003
 (3)  
Do the step that follows to remove the center pressure reducer valve:

 (a)  
Remove the pressure from the center hydraulic system and reservoir (Ref 29-11-00/201).

 S 864-004
 (4)  
Put the R, L, and C FLT CONTROL SHUTOFF valve switches on the right side panel, P61, to the OFF position.

 S 864-005

 (5)  
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:

 (a)  
11H17, FLT CONT SHUTOFF TAIL LEFT

 (b)  
11H18, FLT CONT SHUTOFF TAIL CTR

 (c)  
11H28, FLT CONT SHUTOFF TAIL RIGHT

 S 014-006
 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.
 (6)  
Open the access door for the pressure reducer valves and the bypass valve, 311AL (Ref 06-42-00/201).

 S 864-007

 (7)
Remove electrical power if it is not necessary (Ref 24-22-00/201).

 E.
Remove the Pressure Reducer Valve (Fig. 401)

 S 034-008
 (1)  
Disconnect the electrical connectors (2 locations) from the pressure reducer valve.

 S 034-009

 (2)  
Disconnect the hydraulic lines (3 locations) from the pressure reducer valve.

 NOTE: Use a bucket to catch the fluid from the hydraulic lines and
____
 the pressure reducer.

 S 034-010
 (3)  
Put plugs in the lines and caps on the ports.

 S 034-011

 (4)  
Remove the bolts and washers (3 locations) that attach the pressure reducer valve to the support bracket.

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A

757 MAINTENANCE MANUAL
 S 024-012
 (5)  
Remove the pressure reducer valve.

 F.
Remove the Bypass Valve (Fig. 401)

 S 034-013
 (1)  Disconnect the hydraulic lines from the bypass valve (4 locations).
 NOTE: Use a bucket to catch the fluid from the hydraulic
____
 lines and the bypass valve.
　
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