(a)
Hold the STAB TRIM ALTN switches to APL NOSE DN until the stabilizer moves.
(b)
Make sure the stabilizer position indicators start to move in one second and the leading edge moves up.
(c)
Hold the STAB TRIM switches to NOSE UP until the stabilizer moves. 1) Make sure the stabilizer position indicators start to move
in one second and the leading edge moves down.
(d)
Set the STAB TRIM 2 and 3 switches to ON.
(3)
Examine the hydraulic connections for leaks.
S 792-027
TASK 27-41-04-002-028
5. Pressure Switch Removal (Fig. 201)_______________________
A. References
(1)
AMM 06-09-05/201, Body Section 48 Access Doors and Panels
B.
Access
(1)
Location Zone
311 Area Aft of Pressure Bulkhead, LH
312 Area Aft of Pressure Bulkhead, RH
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
24.
CAP
25.
PRESSURE INLET UNION
26.
O-RING
27.
SCREEN FILTER
23. RETAINER
23. RETAINER
22. RETAINER
21. WASHER
20. SCREW
19. SCREW
18. SHUTOFF VLAVE
747-400
MAINTENANCE MANUAL
7. WASHER
6.SCREW
9.
O-RING
10.
GASKET PLATE
11.
RETAINER
12.
PRESSURE SWITCH
13.
O-RING
14.
O-RING
15.
O-RING
16.
ELECTRIC MOTOR
17.
IDENTIFICATION PLATE
B
Stabilizer Trim Control Module and Components Installation
Figure 201 (Sheet 2)
8. SOLENOID VALVE ASSEMBLY
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(2)
Access Panel 312A Horizontal Stabilizer Jackscrew Access Door
C.
Procedure
S 862-030
(1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(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 012-031
(2)
Open the access Door 312A (AMM 06-09-05/201).
S 032-141
(3)
Disconnect the electrical connector DB188B or DB189B from the pressure switch (12).
S 022-032
(4)
Remove the pressure switch (12):
(a)
Remove the pressure switch (12) from the STCM (1).
(b)
Remove the O-ring (13) and two retainers (11) from the pressure switch (12)
(c)
Discard the O-ring (13) and the retainers (11).
TASK 27-41-04-402-033
6. Pressure Switch Installation____________________________
A. Consumable Materials
(1) D00054 Lubricant - Skydrol Assembly Lube MCS352
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本文链接地址：747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 3(161)
