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A
747-400 MAINTENANCE MANUAL
 S 086-044
 (5)  
Remove the stabilizer handling tool, lock tool, and torque adapter.

 S 496-048

 (6)  
Install the spray shields on the center section of the horizontal stabilizer.

 TASK 27-41-06-206-005
 3.  Horizontal Stabilizer Upper and Lower Gimbal Pin Corrosion Inspection_____________________________________________________________________
 A. References
 (1)  
AMM 27-41-06/401, Stabilizer Trim Drive Mechanism

 (2)  
OHM 27-41-11

 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 016-007
 (1)  
Do this task: "Horizontal Stabilizer Upper and Lower Gimbal Pin Removal" (AMM 27-41-06/401).

 (2)  
Examine the gimbal pins for signs of corrosion.

 S 966-011

 (3)  
If there is sign of corrosion, replace or repair the gimbal pin (OHM 27-41-11).

 S 416-009

 (4)  
Do this task: "Horizontal Stabilizer Upper and Lower Gimbal Pin Installation" (AMM 27-41-06/401).

 S 216-008
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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MAINTENANCE MANUAL

SEE A
SEE B
SEE D
SEE C RBL 36
BULKHEAD AT STA 2460BALL SCREW ASSEMBLY LBL 36
A B
UPPER
GIMBAL
ASSEMBLY

B
A
A
UPPER GIMBAL PIN
UPPER GIMBAL ATTACHMENTS
B
Stabilizer Trim Drive Mechanism Wear Limits Figure 601 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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MAINTENANCE MANUAL

INDEX 5. BALL SCREW/ BALL NUT
INDEX 2. BUSHING/ BALL NUT ASSEMBLY
INDEX 1. BUSHING/OUTER 
GIMBAL PIN 
A-A 
B-B 
LOWER 
GIMBAL 
ASSEMBLY 
C  C 
INDEX 4. LOWER 
GIMBAL 
PIN 

LOWER GIMBAL ATTACHMENTS C
Stabilizer Trim Drive Mechanism Wear Limits Figure 601 (Sheet 2)
INDEX 3. LOWER RETAINING PIN
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MAINTENANCE MANUAL

INDEX 4. BUSHING/LOWER GIMBAL PIN 
INDEX 3. BUSHING/ RETAINING PIN 
BRAKE UNITS HYDRAULIC  C-C  INDEX 6. PRIMARY BRAKE 
PRIMARY BRAKE HOUSING 

PRIMARY BRAKE
D

Stabilizer Trim Drive Mechanism Wear Limits
Figure 601 (Sheet 3)

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REFER TO THE OVERHAUL MANUAL FOR REPAIR PROCEDURE
PERMITS A 0.002 INCH (0.05 mm) MAXIMUM INTERFERENCE FIT CLEARANCE MAXIMUM PERMITTED CLEARANCE
Stabilizer Trim Drive Mechanism Wear Limits
　
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