27-11-12
 ALL  ú ú 03 Page 219 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 862-064
 (3)  
For the applicable system, open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P180 DC Power Distribution Panel
 1) 180H7 LATERAL CONT VALV SYS 1
 2) 180E6 LATERAL CONT VALV SYS 2
 3) 180H22 LATERAL CONT VALV SYS 3
 4) 180E21 LATERAL CONT VALV SYS 4

 S 862-065
 (4)
Release the pressure from hydraulic systems (Ref 29-11-00/201).

 S 012-066

 (5)  
Open the access panels of the hydraulic (573CB - left wing, 673CB -right) and the power control package (573AB and 573BB - left wing, 673AB and 673BB - right) in the lower surface of wing, forward of the aileron (AMM 06-09-08/201).

 D.
Procedure

 S 022-067
 (1)  
Remove the check valves (Fig. 201, Section E-E and F-F):

 (a)  
Put a container below the power control package to catch fluid leakage.

 (b)  
Remove the retainer plug (59) or the retainer plate (61).

 (c)  
Put a rod with threads of 1/4-28UNF-3B into the hole at the end of the check valves (9 and 18).

 (d)  
Pull the check valves from the power control package.

 TASK 27-11-12-402-068
 9.  Aileron Power Control Package Check Valve Installation______________________________________________________
 A. Consumable Materials
 (1)  
G00062 Fluid - Hydraulic, Fire-Resistant, BMS 3-11

 (2)  
D00054 Lubricant - Assembly, Skydrol, MCS352

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-11-12
 ALL  ú ú 03 Page 220 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 B. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 9 | Check Valve | 27-11-12 | 05 | 15 | | | 18 | Check Valve | | | 205 | | | 56 | Backup Ring | | | 25 | | | 57 | Packing | | | 20 | | | 58 | Backup Ring | | | 25 | | | 59 | Retainer Plug | | | 10 | | | 61 | Retainer Plate | | | 55 | | | 62 | Screw | | | 193 | | | 63 | Washer | | | 195 | | | 64 | Backup Ring | | | 70 | | | 65 | Packing | | | 65 | | | 66 | Backup Ring | | | 70 | 2......…........…...................................…...........….....…........1
 C. References
 (1)
06-09-08/201, Wing Access Doors and Panels

 (2)
12-12-01/301, Hydraulic System

 (3)
24-22-00/201, Manual Control

 (4)
29-11-00/201, Main Hydraulic Supply System

 D.
Access

 (1)  
Location Zone
 579 Inboard Aileron, LH
 679 Inboard Aileron, RH

 (2)  
Access Panel
 573CB Hydraulic, LH
 573AB Inboard Aileron Actuator, LH
 573BB Inboard Aileron Actuator, LH
 673CB Hydraulic, RH
 673AB Inboard Aileron Actuator, RH
 673BB Inboard Aileron Actuator, RH

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-11-12
 ALL  ú
 ú  03  Page 221
 ú  Feb 15/98 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 E. Procedure
 S 432-069
 (1)  
Install the check valve (Fig. 201):

 (a)  
Lubricate new backup rings (56, 58, 64, and 66), O-ring packings (57 and 65) and retainer plug (59) with assembly lubricant or hydraulic fluid.

 (b)  
Install backup rings (56, 58, 64, and 66) and O-ring packings (57 and 65) on the check valve (9 and 18).

 (c)  
Install the check valves (9 and 18) with the flow arrows pointed to the manifold.
　
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