(h)
11C9, CSEU 2L DC
or FLT CONT ELEC 2L DC
(i)
11G17, CSEU 1R AC
or FLT CONT ELEC 1R AC
(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 862-074
(5)
Open access panels 324AL, 324BL, and 324CL (Ref 06-42-00).
D.
Remove Rudder Ratio-Changer LVDT (Fig. 201)
S 032-075
(1) Disconnect the electrical connectors (38). Attach a tag for identification.
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757 MAINTENANCE MANUAL
S 032-076
(2)
Disconnect the LVDT (7) from the left support.
S 032-077
(3)
Disconnect the LVDT from the right ratio-changer crank.
S 022-078
(4)
Remove the LVDT.
TASK 27-21-12-422-079
5. Install the Rudder Ratio-Changer LVDT_____________________________________
A. Consumable Materials
(1)
C00308 Compound, Corrosion Preventive -MIL-C-11796, Class III
B.
References
(1)
06-42-00/201, Empennage Access Doors and Panels
(2)
24-22-00/201, Electrical Power - Control
(3)
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 to Fin Seal
324BL Aft Side of Rear Spar and Rudder Hinge
324CL Rudder Hinge and PCUs
D.
Install Rudder Ratio Changer LVDT (Fig. 201)
S 392-080
(1)
Apply the corrosion preventive compound to the screws, nuts, and LVDT end bearings.
S 432-008
(2)
Do these steps to install the LVDT:
(a)
Install the screw (34), bushing (35), washer (36), and nut (37) that connect the LVDT (7) to the right ratio-changer output crank.
(b)
Install the screw (34), bushing (35), washer (36), and nut (37) that connect the LVDT (7) to the left ratio-changer output crank.
(c)
Connect the electrical connector (38) D717 to the mating LVDT connector.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757
MAINTENANCE MANUAL
S 862-081
(3)
Remove the DO-NOT-CLOSE tags and close the P11 panel circuit breakers shown in Table 202.
S 822-120
(4)
Do the Rudder Ratio Changer Actuator - Oscillation Check (AMM 27-21-00/501).
S 822-082
(5)
Adjust the Rudder Ratio Changer LVDT (7) (Ref 27-21-00).
E.
Put the Airplane Back to its Usual Condition
S 862-087
(1)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
(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
S 862-083
(2) Remove the DO-NOT-OPERATE tags and move the FLT CONTROL SHUTOFF L, R, and C switches on the P61 panel to ON.
S 212-009
CAUTION: IF THE RRCM TEST SWITCH IS NOT IN ITS "NORMAL" POSITION, THE
_______ AMBER "RUDDER RATIO" LIGHT WILL COME ON. THIS WILL PREVENT AIRPLANE DISPATCH.
(3)
Make sure that the RRCM test switch is in its NORMAL position.
S 862-084
(4)
Remove electrical power if it is not necessary (Ref 24-22-00).
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