NOTE: The rig pin is a part of the kit F70207-69, -78, or -83.
____
 B.  Access
 (1)  
Location Zone
 706 Vertical Stabilizer

 (2)  
Access Panels
 9510 TE Access Door
 9512 TE Access Panel - Rudder
 9514 TE Access Panel - Rudder
 9559 Cover - Rudder Nose

 C.  
Prepare for the Removal

 S 014-002
 (1)  
Remove the access panels 9512 and 9514 from the vertical stabilizer.

 S 014-003

 (2)  
Remove the rudder nose cover 9559 and the seal from the right side of the vertical fin.

 (3)  
Open the access door 9510.

 (4)  
Install the rig pin R-5.

 S 864-006

 (5)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P18-1 Panel
 1) YAW DAMPER AC
 2) YAW DAMPER DC

 D.  
Remove the Power Control Unit

 S 014-004
 S 494-005
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 ALL  ú ú 01 Page 401 ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 024-039
 CAUTION: DO NOT REMOVE THE UNIONS AND REDUCER FITTINGS FROM THE PCU
_______ PORTS WHEN DISCONNECTING THE HYDRAULIC LINES BECAUSE THAT WILL INCREASE THE POSSIBILITIES FOR CROSS CONNECTION OF THE LINES DURING INSTALLATION.
 (1)  
Disconnect the hydraulic lines from the PCU:

 (a)  
Put a container below the hydraulic connections.

 (b)  
Disconnect the hydraulic lines from the PCU.

 (c)  
Install the plugs in the hydraulic lines and the caps on the port fittings.

 (d)  
Install a tag on the hydraulic lines to make sure you install them correctly.

 S 034-008
 (2) Disconnect the electrical connector from the PCU (Fig. 401).
 S 024-035
 CAUTION: MAKE SURE TO REMOVE THE VERNIER CONTROL ROD BEFORE THE POWER
_______ CONTROL UNIT. FAILURE TO REMOVE THE VERNIER CONTROL ROD FIRST CAN CAUSE DAMAMGE TO THE ROD.
 (3)  
Remove the vernier control rod.

 S 024-010

 (4)  
Remove the PCU:

 (a)  
Remove the rod end bolt that connects the rod assembly to the rudder.

 CAUTION: MAKE SURE YOU HOLD THE PCU DURING THE REMOVAL OF THE
_______ FORWARD MANIFOLD. THE PCU CAN FALL. THIS CAN CAUSE DAMAGE TO THE PCU.
 (b)  
Remove the clevis bolt that connects the forward end of the manifold.

 (c)  
Remove the PCU from the airplane.

 (5)  
Install the rudder lock.

 S 494-011
 TASK 27-21-91-404-012
 3. Rudder Power Control Unit Installation
______________________________________
 A. Special Tools and Equipment
 (1)  F80150-1 Rudder Lock (PCU Removed)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
ROD END POWER BOLT ROD
CONTROL ASSEMBLY
UNIT
B
SEE B
FORWARD
B
MANIFOLD
C
POWER CONTROL CLEVIS
UNIT  EXTERNAL
BOLT SUMMINGSEE A
SEE C A  LEVER C
C
INBD
A
FWD
VERNIER CONTROL ROD
C
INSTALL WITH ROD END NUTPLATES DOWN
POWER CONTROL YAW DAMPER
POWER CONTROL UNIT
UNIT CONNECTOR
1
CAP  A
HYDRAULIC LINE
CONNECTIONS

FWDSEE D
POWER CONTROL UNIT B
1 MAKE SURE THE ELECTRICAL CONNECTOR IS INSTALLED AS SHOWN AND THAT THE CONNECTOR THAT IS NOT USED HAS A CAP.
Rudder Power Control Unit Installation Figure 401 (Sheet 1)
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