S 864-006

 (4)  
Remove the pressure from the right, center and left hydraulic systems and reservoirs (AMM 29-11-00/201).

 NOTE: The right hydraulic system supplies the power to the outboard
____ PCAs. The left hydraulic system supplies the power to the middle PCAs. The center hydraulic system supplies the power to the inboard PCAs.
 S 864-009
 (5)  
Pull both control columns to full aft and hold them in this position with ropes.

 (6)  
Attach a DO-NOT-OPERATE tag to each control column.

 S 494-008
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-31-05
 ALL  ú ú 01 Page 407 ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

 S 864-010
 (7)  Put the L, R, and C FLT CONTROL SHUTOFF switches on the right side panel, P61, to the OFF position.
 S 864-011
 (8)  Move the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the control stand panel, P10, to the CUTOUT position.
 S 864-012
 (9)  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 RIGHT (c) 11C13, STAB TRIM SHUTOFF LEFT (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 (i) 11J10, PCU MON SENSOR (j) 11J11, PCU MON MOD
 S 014-014

 (10)
 Open the access panel, 335DB (left elevator PCAs) or 345DB (right elevator PCAs) (AMM 06-42-00/201).

 S 024-013

 (11)
 Remove the seal panel and the trailing edge beam aft of the access panel (Fig. 401, Section A-A).

 S 494-015
 WARNING: INSTALL THE TWO ELEVATOR LOCK ASSEMBLIES (PCA AND PCA LINKAGE
_______ LOCK ASSEMBLIES) BEFORE YOU DO WORK ON THE PCA OR PCA LINKAGES. INSTALL THE PCA LINKAGE LOCK ASSEMBLY BEFORE YOU INSTALL THE PCA LOCK ASSEMBLY. MAKE SURE THE ELEVATOR CONTROL COLUMN IS HELD TO THE FULL AFT POSITION WHILE YOU INSTALL THE LOCK ASSEMBLIES. ACCIDENTAL MOVEMENT OF THE PCA CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (12) Manually turn the elevator up and install the elevator PCA lockout equipment with the steps that follow (Fig. 402):
 NOTE: A force of approximately 60 pounds (267 newtons) on the
____ elevator trailing edge is necessary to lift the elevator.
 (a)  Install the PCA linkage lock assembly on the elevator center PCA linkage (Detail B).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-31-05
 ALL  ú ú 01 Page 408 ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 (b)  Install PCA lock assembly (Detail C).
 S 044-016
 WARNING: REFER TO AMM 27-61-00/201 FOR THE APPLICABLE
_______ SPOILER/SPEEDBRAKE DEACTIVATION PROCEDURE. THE SPOILERS CAN ACCIDENTALLY MOVE WHEN YOU REMOVE ELECTRICAL POWER. THIS CAN CAUSE INJURY TO PERSONS.
 (13)
 Remove electrical power (AMM 24-22-00/201).

 E.
Elevator PCA Removal (Fig. 401)

 S 034-021
 (1)  
Disconnect the electrical connector from the PCA.

 S 034-022

 (2)  
Remove the bolt (6), washer (7), and nut (8) and disconnect the pogo rod (5) from the PCA summing lever.

 NOTE: Do not change the adjustment of the pogo rod when you
____
 disconnect it from the summing lever.

 S 034-023
 (3)  
Disconnect the hydraulic pressure and return lines (10) from the PCA (9).

 S 494-024

 (4)
Install plugs to the hydraulic lines and caps to the PCA ports.

 S 104-025

 (5)  
Clean the PCA and hydraulic lines and remove any leakage of
 hydraulic fluid.

 S 034-026

 (6)  
Hold the PCA (9) and remove the bolt (14), washers (15, 17), bushing (16), and nut (18) that connect the PCA rod end (12) to the elevator spar fitting.
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 飛行操縱 FLIGHT CONTROLS 3(77)