747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 3(169)

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A 747-400 MAINTENANCE MANUAL
 (3)  S 862-118Set the STAB TRIM 2 and 3 switches to AUTO.
 (4)  S 712-112Do this test of the filter screen (27): (a) Use the STAB TRIM ALTN switches to operate the stabilizer to APL NOSE UP and APL NOSE DN. (b) Examine the filter screen (27) for hydraulic leaks.
 (5)  S 862-162If the hydraulic power is not necessary, do this task: Hydraulic Power" (AMM 29-11-00/201). "Remove
 (6)  S 862-114If the electrical power is not necessary, do this task: Electrical Power (AMM 24-22-00/201). "Remove
 (7)  S 412-113Close the access door 312A (AMM 06-09-05/201).

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A
747-400 MAINTENANCE MANUAL
 STABILIZER TRIM HYDRAULIC BRAKES - REMOVAL/INSTALLATION
_______________________________________________________
 1.  General________
 A.  There are two tasks in this procedure. There is one task each the for the removal and the installation of the stabilizer trim hydraulic brake. The procedure has these parts:
 (1)  
The removal of the stabilizer trim hydraulic brake

 (2)  
The installation of the replacement hydraulic brake

 (3)  
An operational test of the hydraulic brake.

 B.  
The removal and installation procedure for the hydraulic brake is the same for the left or the right hydraulic brake.

 TASK 27-41-05-004-001
 2.  Stabilizer Trim Hydraulic Brakes Removal (Fig. 401)________________________________________
 A.  Standard Tools and Equipment
 (1)  
Bucket - 1 gallon capacity (for hydraulic fluid)

 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

 (4)  
AIPC 27-41-06, Fig. 1

 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

 D.  
Procedure

 S 864-002
 (1)  
Do this task to depressurize the hydraulic systems No. 2 and No. 3: "Hydraulic System Depressurization" (AMM 29-11-00/201).

 (2)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

 (3)  
Set the STAB TRIM 2 and 3 switches on the control stand to CUTOUT.

 S 864-003
 S 864-004
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747-400
MAINTENANCE MANUAL

SEE A
SEE B
MOTOR DRAIN PORT
(TYP)

PRESS PORT H1
(TYP)

RETURN PORT H2
(TYP)

SEAL DRAIN
PORT H3
ADAPTER
(TYP)

3. ATTACHMENT NUT
(4 PLACES)

BULL GEAR HOUSING COVER
2. DIFFERENTIAL
BRAKE SHAFT

1. O-RING (TYP)
A
Horizontal Stabilizer Trim Drive Mechanism Hydraulic Brake Installation Figure 401 (Sheet 1)
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747-400
MAINTENANCE MANUAL

4. HYDRAULIC BRAKE
3. NUT
5. WASHER
3. NUT 
5. WASHER 
8. PACKING 
7. NUT 
6. ADAPTER 
8. PACKING 
7. NUT 
6. ADAPTER 
9. BOLT 

HYDRAULIC BRAKE
　
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