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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 032-120
 (7)  
FOR THE LEFT STCM; Disconnect electrical connectors DB189A, DB189B, DB189C, DB189D and DB189E.

 S 032-124

 (8)  
FOR THE RIGHT STCM; Disconnect electrical connectors DB188A, DB188B, DB188C, DB188D and DB188E.

 S 032-147

 (9)  
Remove the cap (24) from the pressure inlet union (25).

 S 022-140

 (10)
 Remove the filter screen (27) from the STCM (1):

 (a)  
Remove the pressure inlet union (25) from the STCM (1).

 (b)  
Remove the O-ring (26) from the inlet pressure union (25). 1) Discard the O-ring (26).

 (c)  
Remove the filter screen (27) from the pressure inlet union (25) or the STCM (1).

 TASK 27-41-04-402-116
 15. Filter Screen Installation
__________________________
 A. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 24 | Cap | 27-41-04 | 05 | 25 | | | 25 | Union | | | 65 | | | 26 | Packing (O-ring) | | | 60 | | | 27 | Screen Filter | | | 95 | 2......…........…...................................…...........….....…........1
 B. References
 (1)  
AMM 06-09-05/201, Body Section 48 Access Doors and Panels

 (2)  
AMM 24-22-00/201, Manual Control

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

 C.
Access

 (1)  
Location Zone
 311 Area Aft of Pressure Bulkhead, LH
 312 Area Aft of Pressure Bulkhead, RH

 (2)  
Access Panel 312A Horizontal Stabilizer Jackscrew Access Door

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 D. Install the Filter Screen
 S 432-132
 (1)  
Install the O-ring (26) on the pressure inlet union (25).

 S 422-135

 (2)  
Install the filter screen (27) in the STCM (1):

 (a)  
Install the filter screen (27) in the pressure inlet union (25).

 (b)  
Install the pressure inlet union (25) and the filter screen (27) in the STCM (1).

 (c)  
Tighten the pressure inlet union (25) to 255-285 pound-inches.

 S 432-148
 (3)  
Install the cap (24) on the pressure inlet union (25).

 (a)  
Tighten the cap to 5-10 pound-inches (0.57-1.1 newton-meters).

 S 432-139
 (4)  
FOR THE LEFT STCM; Connect electrical connectors DB189A, DB189B, DB189C, DB189D and DB189E.

 S 432-121

 (5)  
FOR THE RIGHT STCM; Connect electrical connectors DB188A, DB188B, DB188C, DB188D and DB188E.

 S 862-136

 (6)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P7, Overhead Circuit Breaker Panel
 1) 7E6, STAB TRIM L CONT
 2) 7E7, STAB TRIM L S/O VLV
 3) 7E19, STAB TRIM R CONT
 4) 7E20, STAB TRIM R S/O VLV

 S 862-137
 (7)  
Remove the DO-NOT-MOVE tags and set the STAB TRIM 2 and 3 switches to ON.

 E.
Do a Test of the Filter Screen

 (1)  
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

 (2)  
Do this task: "Supply Hydraulic Power" (AMM 29-11-00/201).

 S 862-116
 S 862-125
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