S 862-050
(3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(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
F.
Do a Test of the Solenoid Valve Assembly
S 862-063
(1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 862-051
(2)
Do this task: "Supply Hydraulic Power" (AMM 29-11-00/201).
S 862-052
(3)
Set the STAB TRIM 2 and 3 switches to ON.
S 712-145
(4)
Do this test of the solenoid valve assembly (8):
(a)
Use the STAB TRIM ALTN switches to operate the stabilizer to APL NOSE UP and APL NOSE DN.
(b)
Examine the solenoid valve assembly (8) for hydraulic leaks.
S 862-055
(5)
If the hydraulic power is not necessary, do this task: "Remove Hydraulic Power" (AMM 29-11-00/201).
S 862-056
(6)
If the electrical power is not necessary, do this task: "Remove Electrical Power" (AMM 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-41-04
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 412-057
(7) Close the access door 312A (AMM 06-09-05/201).
TASK 27-41-04-002-064
9. Motor Operated Shutoff Valve Removal (Fig. 201)____________________________________
A. 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
B.
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
C.
Procedure
S 862-065
(1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 862-066
(2)
Set the STAB TRIM 2 and 3 switches to CUTOUT.
S 872-129
(3)
Decrease the remaining pressure in the hydraulic system:
(a)
Move the STAB TRIM ALTN switches to APL NOSE UP and APL NOSE DN three times and attach DO-NOT-MOVE tags.
S 862-069
(4)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(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 862-070
(5) If the electrical power is not necessary, do this task: "Remove Electrical Power" (AMM 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-41-04
ALL ú ú 01 Page 215 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 012-071
(6)
Open the access door 312A (AMM 06-09-05/201).
S 032-072
(7)
Disconnect the electrical connector DB188C or DB189C from the shutoff valve (18).
S 032-073
(8)
Remove the bolts (20), the washers (21) from the shutoff valve (18).
S 022-074
(9) 中國航空網(wǎng) www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 飛行操縱 FLIGHT CONTROLS 3(164)
