S 865-038

 (16)
 Open this circuit breaker on the P11 panel and attach a DO-NOT-CLOSE tag:

 (a)  
11J11, PCU MON MOD

 S 215-045
 (17)
 Make sure the L ELEV PCU, R ELEV PCU, and RUDDER PCU messages come into view on the bottom EICAS display.

 S 865-046

 (18)
 Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:

 (a)  
11J11, PCU MON MOD

 S 825-052
 (19)
 Do these steps to erase the EICAS memory:

 (a)  
Push the ECS/MSG switch on the P61 panel and do this check: 1) Make sure the ECS/MSG format comes into view.

 (b)  
Push the AUTO - EVENT READ switch and do this check:

 1)  Make sure the AUTO EVENT display comes into view at the bottom of the page.

 (c)  
Push the ERASE switch for 3 seconds.

 F.  
Put the Airplane Back to Its Usual Condition

 S 095-039
 WARNING: STAY AWAY FROM THE NOSE WHEELS WHEN THE LOCKPIN IS REMOVED.
_______ THE WHEELS CAN TURN TO THE CENTER POSITION QUICKLY, AND CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  
Make sure the nose wheels are in their center position and remove the towing lever lockpin from the nose gear (Fig. 502).

 S 865-040

 (2)  
Remove the power from the left, right, and center hydraulic systems (Ref 29-11-00).

 (3)
Remove electrical power if it is not necessary (Ref 24-22-00).

 S 865-041
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-23-00
 ALL  ú ú 02 Page 511 ú Jun 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 RUDDER AND ELEVATOR HYDRAULIC SHUTOFF VALVES - MAINTENANCE PRACTICES
____________________________________________________________________
 1.  General
_______
 A.  This procedure contains the removal and installation tasks for the rudder and elevator hydraulic shutoff valves.
 TASK 27-23-01-022-003
 2.  Rudder and Elevator Hydraulic Shutoff Valves - Removal
______________________________________________________
 A.  References
 (1)  
24-22-00/201, Electrical Power - Control

 (2)  
29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 (3)  
32-00-15/201, Landing Gear Door Locks

 (4)  
32-00-20/201, Landing Gear Downlocks

 B.  
Access

 (1)  
Location Zone
 730/740 Main Landing Gear and Doors

 C.  
Prepare for the Removal

 S 862-004
 (1)  
Supply electrical power (Ref 24-22-00).

 S 862-005

 (2)  
Remove the pressure from the hydraulic system that supplies the valve you will remove (Ref 29-11-00).

 S 862-006

 (3)  
Move the FLT CONTROL SHUTOFF switches L, R, and C on the right side panel, P61, to OFF. Attach DO-NOT OPERATE tags and make sure the switch position lights come on.

 S 862-007

 (4)  
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 862-008
 (5)  Make sure the downlocks are installed on the nose and main landing gear (Ref 32-00-20).
 S 492-001
 WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (6)  Open the doors for the landing gear and install the door locks (Ref 32-00-15).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-23-01
 ALL  ú ú 01 Page 201 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

HYDRAULIC SHUTOFF VALVE (RIGHT SYSTEM)
SEE A
　
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