S 412-085
(5)
Close access panels 324AL, 324BL, and 324CL (Ref 06-42-00).
TASK 27-21-12-002-093
6. Remove the Support Clevis of the Rudder Ratio Changer
_____________________________________________________
A. References
(1)
06-42-00/201, Empennage Access Doors and Panels
(2)
24-22-00/201, Electrical Power - Control
(3)
29-11-00/201, MIN (Left, Right, and Center) Hydraulic Systems
B.
Access
(1)
Location Zone 324 Vertical Stabilizer - Rear Spar to Trailing Edge
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(2)
Access Panels
324AL Body and Fin Seal
324 BL Aft Side of Rear Spar and Rudder Hinge
C.
Prepare for the Removal
S 862-089
(1)
Supply electrical power (Ref 24-22-00/201).
S 862-090
(2)
Remove the power from the left, right, and center hydraulic systems (Ref 29-11-00/201).
S 862-091
(3)
Move the FLT CONTROL SHUTOFF L, C, and R switches on the right side panel, P61, to OFF. Attach DO-NOT-OPERATE tags.
(a)
Make sure the amber switch position legend lights come ON.
S 862-092
(4)
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11D18 or 11G10, RUD RATIO
(b)
11H17, FLT CONT SHUTOFF TAIL LEFT
(c)
11H18, FLT CONT SHUTOFF TAIL CTR
(d)
11H28, FLT CONT SHUTOFF TAIL RIGHT
(e)
11C6, CSEU 1L AC
or FLT CONT ELEC 1L AC
(f)
11C7, CSEU 1L DC
or FLT CONT ELEC 1L DC
(g)
11C8, CSEU 2L AC
or FLT CONT ELEC 2L AC
(h)
11C9, CSEU 2L DC
or FLT CONT ELEC 2L DC
(i)
11G17, CSEU 1R AC
or FLT CONT ELEC 1R AC
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
(j)
11G18, CSEU 1R DC or FLT CONT ELEC 1R DC
(k)
11G27, CSEU 2R AC or FLT CONT ELEC 2R AC
(l)
11G28, CSEU 2R DC or FLT CONT ELEC 2R DC
S 862-095
(5)
Open access panels 324AL, 324BL, and 324CL (Ref 06-42-00).
D.
Remove the Support Clevis
S 012-097
(1)
Disconnect the Rudder Ratio Changer Actuator
(a)
Disconnect the RRCA from the left ratio changer crank.
(b)
Disconnect the RRCA from the support clevis.
S 022-098
(2) Remove the Support Fitting, nut, washer and shims.
NOTE:____Do not lose or cause damage to the shims. The shim thickness sets the rig length of the RRCA.
TASK 27-21-12-402-099
7. Install the Rudder Ratio Actuator Changer Support Clevis________________________________________________________
NOTE: If the shims are damaged or lost during the removal procedure, start the installation with approximately 6 shims.
A. Consumable Materials
(1)
A00247 Sealant, Chromate Type BMS 5-95
B.
References
(1)
06-42-00/201, Empennage Access Doors and Panels
(2)
27-21-00/501, Rudder and Rudder Trim Control System
C.
Access
(1)
Location Zone 324 Vertical Stabilizer - Rear Spar to Trailing Edge
(2)
Access Panels 324AL Body and Fin Seal 324BL Aft Side of Rear Spar and Rudder Hinge
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