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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
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747-400
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)
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747-400
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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747-400
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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MAINTENANCE MANUAL
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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