S 864-062

 (7)  
Remove the hydraulic power (AMM 29-11-00/201).

 S 864-065

 (8)  
Put the FLT CONTROL HYD POWER - TAIL switches No. 1, 2, 3, and 4 on the P461 Pilot's Overhead Maintenance Panel in the SHUTOFF position.

 S 864-066

 (9)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P7, Overhead Circuit Breaker Panel 1) 7B11, UPR RUD RATIO AC PWR 2) 7B12, UPR RUD RATIO CONT 3) 7B13, UPR RUD RATIO DC PWR 4) 7B14, LWR RUD RATIO AC PWR 5) 7B15, LWR RUD RATIO CONT 6) 7B16, LWR RUD RATIO DC PWR 7) 7D16, RUD TRIM CONT

 (b)  
P180, DC Power Distribution Panel 1) 180E7, ELEV/RUD VLV SYS 2 2) 180E22, ELEV/RUD VLV SYS 4 3) 180H8, ELEV/RUD VLV SYS 1 4) 180H23, ELEV/RUD VLV SYS 3

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MAINTENANCE MANUAL

 S 014-067
 WARNING:_______MAKE SURE THE AREA BELOW THE RUDDERS IS CLEAR. THE POWER CONTROL ACTUATORS WEIGH APPROXIMATELY 30 POUNDS. IF AN ACTUATOR FALLS, IT CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (10) Remove the applicable access panels.
 TASK 27-21-15-004-001
 3.  Upper Rudder Upper Actuator Removal (Fig. 401)___________________________________
 A. Special Tools and Equipment
 (1)  
ST2580-267, Spanner Wrench Adapter Set

 (2)  
G27008-19, Rudder Actuator Lock

 (3)  
G27016-39, Hoist Frame

 (4)  
Fishpole Hoist - P/N PF51-009-1 or Equivalent
 PF Industries
 Hoist Manlift
 Didsbury Engineering

 B.
Standard Tools and Equipment

 (1)  
Bucket - 1 gallon capacity (for hydraulic fluid)

 C.
Access

 (1)  
Location Zone 324 Vertical Stabilizer, Rear Spar to Trailing Edge 326 Upper Rudder

 D.
Procedure

 S 864-002
 (1)  
Do the task to prepare for the removal of the PCA.

 S 034-004

 (2)  
Remove the clamp (18) that holds the wire bundle to the upper actuator (4).

 S 034-005

 (3)  
Disconnect the hydraulic lines H1 and H2 from the upper actuator:

 (a)  
Put a bucket below the actuator to catch the hydraulic fluid.

 (b)  
Disconnect the hydraulic lines from the actuator.

 (c)  
Install caps on the hydraulic lines.

 S 024-006
 (4)  
Remove the upper actuator (4):

 (a)  
Remove the nut (16) and washer (17).

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MAINTENANCE MANUAL

SEE A
BSEE UPPER RUDDER POWER CONTROL PACKAGE  RUDDER 1. UPPER 
TRANSMITTER POSITION UPPER RUDDER 
3. PILLOW BLOCK 2. TRUNNION  SEE  C LINES H1, H2 HYDRAULIC GSEE  18. WIRE BUNDLE CLAMP 4. UPPER ACTUATOR  A 
SEE  D 
CHANGER RATIO RUDDER 9. UPPER  5. UPPER RUDDER POWER CONTROL MODULE 
HYDRAULIC LINES H3, H4 GSEE  SEE  C  ESEE 6. CENTER ACTUATOR 
HYDRAULIC LINES H5, H6 GSEE  SEE  F 
8. TRUNNION SEE  C  7. LOWER ACTUATOR 
B 
Figure 401 (Sheet 1) Upper Rudder Power Control Actuator 

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A 747-400 MAINTENANCE MANUAL
13.  BOLT

3. PILLOW BLOCK
10.  SHIM
19. BUSHING
15.  UPPER RUDDER ATTACHMENT FITTING
　
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