S 412-040

 (6)  
Install the access panels and close the access doors (Ref 06-09-06/201, 06-09-07/201).

 TASK 27-21-17-002-041
 4.  Rudder Power Control Module Filter Removal__________________________________________
 A. References
 (1)  
06-09-07/201, Fin and Rudder Access Doors and Panels

 (2)  
24-22-00/201, Manual Control

 (3)  
29-11-00/201, Main Hydraulic Supply System

 (4)  
IPC 27-21-17, Fig. 1

 (5)  
IPC 27-21-15, Fig. 50

 B.
Access

 (1)  
Location Zone 324 Vertical Fin, Rear Spar to Trailing Edge 325 Lower Rudder 326 Upper Rudder

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747-400
MAINTENANCE MANUAL

 (2)  Access Panel
 324DL, 324DR Inspection Access Panel
 324FL, 324FR Inspection Access Panel
 324UL, 324UR Inspection Access Panel

 C. Procedure
 S 862-042
 (1)  Remove the hydraulic power (Ref 29-11-00/201).
 S 862-043
 (2)  Set the FLT CONTROL HYD POWER TAIL switches on the P461 Pilot's Overhead Maintenance Panel to SHUTOFF.
 S 862-045
 (3)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  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

 S 022-046
 (4)  Remove the inlet filter element (23):
 (a)  Remove the inlet filter cap (20).
 (b)  Remove the backup rings (21) and the O-ring (22) from the inlet filter cap (20).
 (c)  Remove the inlet filter element (23) from the PCM.
 S 022-047
 (5)  Remove the transfer filter element (16):
 (a)  Remove the transfer filter cap (19).
 (b)  Remove the backup rings (17) and the O-ring (18) from the transfer filter cap (19).
 (c)  Remove the transfer filter element (16) from the PCM.
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747-400 MAINTENANCE MANUAL
 TASK 27-21-17-402-048
 5.  Rudder Power Control Module Filter Installation_______________________________________________
 A. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | | | UPPER RUDDER PCM FILTER | | | | | 201 | 15 | Ring - Backup | 27-21-15 | 50 | 105 | | | 16 | Filter - Element | | | 100 | | | 17 | Ring - Backup | | | 90 | | | 18 | O-Ring | | | 95 | | | 19 | Cap - Filter | | | 85 | | | 20 | Cap - Filter | | | 115 | | | 21 | Ring - Backup | | | 120 | | | 22 | 0-Ring | | | 125 | | | 23 | Filter - Element | | | 130 | | | 24 | Ring - Backup | | | 135 | | | 25 | O-Ring | | | 140 | | | 26 | O-Ring | | | 110 | | | | LOWER RUDDER PCM FILTER | | | | | 201 | 15 | Ring - Backup | 27-21-17 | 01 | 85 | | | 16 | Filter - Element | | | 70 | | | 17 | Ring - Backup | | | 75 | | | 18 | O-Ring | | | 80 | | | 19 | Cap - Filter | | | 65 | | | 20 | Cap - Filter | | | 95 | | | 21 | Ring - Backup | | | 100 | | | 22 | 0-Ring | | | 105 | | | 23 | Filter - Element | | | 110 | | | 24 | Ring - Backup | | | 115 | | | 25 | O-Ring | | | 120 | | | 26 | O-Ring | | | 90 | | | | | | | | 2......…........…...................................…...........….....…........1
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