757 MAINTENANCE MANUAL
ELEVATOR POWER CONTROL ACTUATOR (PCA)/REACTION LINK/IDLER LINK -
______________________________________________________________ REMOVAL/INSTALLATION
____________________
1. General_______
A. This procedure contains the tasks to remove and install the following elevator actuation components:
(1)
the Power Control Actuator (PCA)
(2)
the Reaction Link
(3)
the Idler Link.
TASK 27-31-05-024-001
2. Remove the Power Control Actuator (PCA)_______________________________________
A. Equipment
(1)
Lock Assemblies from the Elevator PCA Lockout Equipment, B27009-12:
(a)
Lock Assembly, PCA, B27009-2
NOTE:____The PCA lock assembly is installed on the PCA. It contains a shear-out device that prevents damage caused by accidental operation during maintenance.
(b)
Lock Assembly, PCA Input Linkage, B27009-3
NOTE: The lock assembly for the PCA input linkage holds the
____ elevator linkage in the up position during maintenance. It is installed on the center PCA linkage.
B. References
(1)
AMM 06-42-00/201, Empennage Access Doors and Panels
(2)
AMM 24-22-00/201, Electrical Power - Control
(3)
AMM 27-02-00/601, Flight Controls Surfaces
(4)
AMM 27-31-05/601, Elevator Power Control Actuator
(5)
AMM 27-61-00/201, Spoiler/Speedbrake Control System
(6)
AMM 29-11-00/201, Main (Left, Right and Center) Hydraulic Systems
C.
Access
(1)
Location Zones 211/212 Control Cabin 335/345 Horizontal Stabilizer, Rear Spar to Trailing Edge
(2)
Access Panels 335DB/345DB Left/Right Elevator, PCUs and Control Linkage
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ALL ú ú 01 Page 401 ú May 28/02
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A
757
MAINTENANCE MANUAL
PCA,
REACTION LINK,
AND IDLER LINK
(3 LOCATIONS)
SEE A
A
11. STABILIZER REAR SPAR
22. FLANGED
SPACER
(2 LOCATIONS)
9. POWER CONTROL ACTUATOR (PCA)
REACTION LINK LUBE FITTING
6 FWD
A
INBD
23.
BOLT
24.
WASHER (QTY 2)
25.
NUT (4 LOCATIONS)
1
1.
BOLT
2.
WASHER (OTY 2)
3.
NUT (4 LOCATIONS)
10. HYDRAULIC CONNECTIONS
1
2
(2 LOCATIONS) 4. TRUNNION
2
6. BOLT LINK REACTION
7.
WASHER
8.
NUT
PCA SUMMING LEVER
PCA, REACTION LINK, AND IDLER LINK (LEFT WING IS SHOWN, RIGHT WING IS OPPOSITE)
A
Elevator Power Control Actuator (PCA), Reaction Link, and Idler Link Installation Figure 401 (Sheet 1)
INPUT CRANK SUPPORT
RIG PIN LOCATION
INPUT
CRANK ELEVATOR UP DIRECTION
CONTROL
ROD PRESSURE DIFFERENTIAL SENSOR
5. POGO ROD CENTERING SPRING
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27-31-05
ALL ú ú 01 Page 402 ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
REACTION LINK
PCA ROD END
20. REACTION LINK
LUBE FITTING
LUBE FITTING
ROD END
6
6
B
11. STABILIZER
19. REACTION
REAR SPAR
C
10. HYDRAULIC CONNECTIONS
13. IDLER LINK C IDLER LINK
LUBE FITTING FWD (2 LOCATIONS) 6
15.
WASHER 34
16.
BUSHING 3
14. BOLT
17.
WASHER 35
18.
NUT ELEVATOR SPAR FITTING
3
3
ROD END
INBD
B-B
1 APPLY A LAYER OF SEALANT TO THE BOLT THREADS AND THREAD END OF THE SHANK AND
INSTALL BOLTS, WASHERS, AND NUTS. CLEAN ANY UNWANTED SEALANT
2 APPLY A LAYER OF SEALANT TO THE MATING SURFACE BEFORE INSTALLATION
3 INSTALL THE BOLTS, BUSHINGS, WASHERS, AND NUTS WITH BMS 3-33 GREASE. CLEAN ANY UNWANTED GREASE. BMS 3-33 (RECOMMENDED), BMS 3-24 (OPTIONAL).
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