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27-21-20
ALL ú ú 01 Page 210 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(5)
29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
F.
Access
(1)
Location Zone
324 Vertical Stabilizer - Rear Spar to Trailing Edge
(2)
Access Panel
324CL Rudder Hinge and PCAs
G.
Install the Rudder PCA (Fig. 201)
NOTE: The shearout lever (17) must be installed on the PCA before it is
____
installed on the airplane.
S 622-026
(1)
Apply the corrosion preventive compound to the bolts and bushings before they are installed.
S 432-027
(2)
Do these steps to connect the actuator to its trunnion:
(a)
Align the actuator (12) with the holes in the trunnion block (19).
(b)
Install the bolts (20), washers (21), washers (22), and the nuts (23) that connect the actuator to the trunnion. Tighten the nuts to 200 - 250 pound-inches (22.6-28.2 newton-meters).
S 432-028
(3)
Do these steps to connect the PCA (12) and reaction link (3) rod ends to the rudder front spar (4):
(a)
Turn the actuator (12) and reaction link (3) until they are aligned with the rudder front spar (4).
(b)
Install the bolts (5), washers (7), bushings (6), and nuts (8). Do these checks: 1) Make sure the torque that is necessary to turn the nut
before it touches the rudder front spar is 90 - 400 pound-inches. 2) Tighten the nut to 1000 - 1400 pound-inches (113-158 newton-meters).
S 432-029
(4)
Connect these components:
(a)
The input rod between the actuator shearout lever (17) and the torque tube (1)
(b)
The electrical connector to the rudder PCA monitor sensor
(c)
The hydraulic lines (2) to the actuator (12).
(5)
Lubricate the PCA grease fittings after installation.
S 642-030
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-21-20
ALL ú ú 01 Page 211 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 862-031
(6) Move the rudder pedals to their full right position and hold them there.
S 862-032
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(7) Supply hydraulic pressure to the PCA that has the lockout tool installed (Ref 29-11-00).
NOTE:____The right system supplies the top PCA. The left system supplies the middle PCA. The center system supplies the bottom PCA.
S 862-033
(8)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the overhead panel, P11:
(a)
11H17, FLT CONT SHUTOFF TAIL LEFT
(b)
11H18, FLT CONT SHUTOFF TAIL CTR
(c)
11H28, FLT CONT SHUTOFF TAIL RIGHT
(d)
11J10, PCU MON SENSOR
(e)
11J11, PCU MON MOD
S 862-077
(9)
Remove the DO-NOT-OPERATE tags and move the FLT CONTROL SHUTOFF switches L, C, and R on the right side panel, P61, to ON.
S 862-035
(10)
Remove the power from the left, right, and center hydraulic systems (Ref 29-11-00).
S 092-034
WARNING: DO NOT REMOVE THE PCA LOCKOUT TOOL WITH HYDRAULIC POWER ON.
_______ THE RUDDER CAN MOVE QUICKLY AND CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(11)
Do these steps immediately after hydraulic power is removed:
(a)
Remove the PCA lockout tool.
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