S 744-035
(7)
For the right elevator control force transducer, do MCDP Ground Test 15-R COL XDCR (Ref 22-00-02).
F. Put the Airplane Back to Its Usual Condition
S 864-036
(1)
Set the MCDP to off.
S 864-037
(2)
Remove hydraulic power if it is not necessary (Ref 29-11-00).
S 864-038
(3)
Remove electrical power if it is not necessary (Ref 24-22-00).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH CONTROL ú
22-12-03
WHEEL STEERING ú ú 03 Page 408 ú Dec 20/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
ELEVATOR NEUTRAL SHIFT TRANSDUCER - REMOVAL/INSTALLATION
________________________________________________________
1. General_______
A. The three elevator neutral shift transducers are on the feel centering assembly aft of the horizontal stabilizer in fuselage section 48. The transducers are accessible through access panel 313AL, aft of the stabilizer.
TASK 22-12-04-004-001
2. Remove the Elevator Neutral Shift Transducer____________________________________________
A. References
(1)
06-42-00/201, Empennage (Major Zone 300) Access Doors and Panels
(2)
24-22-00/201, Electrical Power - Control
(3)
29-11-00/201, Pressurize/Depressurize Hydraulic System
B. Access
(1)
Location Zone
313 Stabilizer Center Section Compartment
(2)
Access Panel
313AL APU Intake Port and Door Installation
C. Prepare to Remove the Elevator Neutral Shift Transducer
S 864-002
(1) Supply electrical power (Ref 24-22-00).
S 864-003
WARNING: MAKE SURE ALL PERSONS AND STANDS ARE CLEAR OF THE CONTROL
_______ SURFACES BEFORE THE HYDRAULIC SYSTEMS ARE PRESSURIZED. THE CONTROL SURFACES CAN MOVE WHEN THE HYDRAULIC SYSTEMS ARE PRESSURIZED OR IF ANY OF THE CONTROLS ARE MOVED. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Supply hydraulic pressure (Ref 29-11-00).
S 864-004
(3)
Put the stabilizer in leading-edge down position (full nose up) for easy access.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
22-12-04
ALL ú ú 01 Page 401 ú Mar 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 864-005
(4)
Set the two STAB TRIM switches on the P10 panel to the CUT OUT position.
S 864-006
(5)
Remove the pressure from the left, center and right hydraulic systems (Ref 29-11-00).
S 864-007
(6)
Set the L, C, and R FLT CONTROL SHUTOFF switches on the right side panel P61 to the OFF position and attach DO-NOT-OPERATE tags.
S 864-008
(7)
Set the two F/D switches on the MCP to OFF.
S 864-009
(8)
Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11C12, STAB TRIM SHUTOFF LEFT
(b)
11C13, STAB TRIM SHUTOFF RIGHT
(c)
11H17, FLT CONT SHUTOFF LEFT
(d)
11H18, FLT CONT SHUTOFF CENTER
(e)
11H28, FLT CONT SHUTOFF RIGHT
(f)
For the left transducer:
1) 11E17, FLT CONT COMPUTER POWER LEFT
2) 11E18, FLT CONT COMPUTER SERVO LEFT
(g)
For the center transducer:
1) 11E20, FLT CONT CMPTR PWR CENTER
2) 11E21, FLT CONT CMPTR SERVO CENTER
(h)
For the right transducer:
1) 11E35, FLT CONT CMPTR PWR RIGHT
2) 11E36, FLT CONT CMPTR SERVO RIGHT
S 864-010
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.
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