(a)
P7, Overhead Circuit Breaker Panel
1) 7C10, FLT CONT ELEC 2L AC
2) 7C11, FLT CONT ELEC 2L DC
3) 7C12, FLT CONT ELEC 1L AC
4) 7C13, FLT CONT ELEC 1L DC
5) 7C14, FLT CONT ELEC 1R AC
6) 7C15, FLT CONT ELEC 1R DC
7) 7C16, FLT CONT ELEC 2R AC
8) 7C17, FLT CONT ELEC 2R DC
9) 7E6, STAB TRIM L CONT
10) 7E7, STAB TRIM L S/O VLV
11) 7E8, STAB TRIM L RATE
12) 7E19, STAB TRIM R CONT
13) 7E20, STAB TRIM R S/O VLV
14) 7E21, STAB TRIM R RATE
15) 7E23, STAB TRIM ALTN CONT
S 012-045
(2)
Open the access door 312A (AMM 06-09-05/201).
S 032-143
(3)
Disconnect these electrical connectors DB188A and DB188E or DB189A and DB189E from the solenoid valve assemblies (8).
S 022-046
(4)
Remove the solenoid valve assembly (8) from the STCM:
(a)
Remove the screw (6) and the washer (7).
(b)
Remove the solenoid valve assembly (8) from the STCM.
(c)
Remove the gasket plate (10) from the solenoid valve assembly (8).
(d)
Discard the gasket plate (10).
(e)
Remove the O-ring (9) from the solenoid valve assembly (8).
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747-400 MAINTENANCE MANUAL
(f) Discard the O-ring (9).
TASK 27-41-04-402-047
8. Solenoid Valve Assembly Installation____________________________________
A. Consumable Materials
(1)
D00054 Lubricant - Skydrol Assembly Lube MCS352
B.
Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 6 | Screw | 27-41-04 | 05 | 5 | | | 7 | Washer | | | 10 | | | 8 | Solenoid Valve | | | 12 | | | 9 | O-ring | | | 15 | | | 10 | Gasket Plate | | | 20 | | | | | | | | 2......…........…...................................…...........….....…........1
C.
References
(1)
AMM 06-09-05/201, Body Section 48 Access Doors and Panels
(2)
AMM 24-22-00/210, Manual Control
(3)
AMM 29-11-00/201, Main Hydraulic Supply System
D.
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
E.
Install the Solenoid Valve Assembly
S 422-048
(1)
Install the solenoid valve assembly (8) on the STCM:
(a)
Apply a thin layer of the assembly lube MCS253 to two sides of the gasket plate (10).
(b)
Lubricate the O-ring (9) with assembly lube MCS352.
(c)
Install the O-ring (9) on the solenoid valve assembly (8).
(d)
Install the solenoid valve assembly (8) on the STCM (1).
(e)
Install the screws (6) and the washers (7) on the solenoid valve assembly (8).
(f)
Tighten the screws (6) to 50-70 pound-inches.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 432-144
(2)
Connect these electrical connectors DB188A and DB188E or DB189A and DB189E to the solenoid valve assembly (8).
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