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747-400 MAINTENANCE MANUAL
TRANSMISSION
TORQUE TUBE
BALL SCREW
SEEC D
SEE A
MIDFLAP
SEE B
FOR OUTBOARD FLAPS
0.365 |0.05 INCH
(9.27 |1.27 mm) DOWN
STOPDIMENSION YFOR INBOARD FLAPS
0.427 |0.05 INCH
(10.85 |1.27 mm)
BALL UNIVERSAL
BALL SCREW SCREW NUT JOINT
NUT STOP
A B
Ball Screw Installation
Figure 402 (Sheet 1)

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747-400 MAINTENANCE MANUAL
TRANSMISSION
1.
 BOLT

2.
 WASHER

3.
 WASHER

4.
 NUT

KEY 5. RETAINER
6. NUT
UNIVERSAL
JOINT

7. GIMBAL CAP
13. BOLT 8. WASHER
14.
 WASHER

15.
 WASHER

4. NUT BALL SCREW
NUT BALL RETURN TUBE
10. BOLT FWD
9. BALL SCREW DOWNSTOP
OUTBOARD FLAPS
C
1.
 BOLT

2.
 WASHER

KEY
3.
 WASHER

11. NUT
4. NUT MIDFLAP
12. WASHER
TRANSMISSION
UNIVERSAL
JOINT

7. GIMBAL CAP
BALL
SCREW SEE E
NUT
8.  WASHER FWD
10. BOLT 9.BALL SCREW
INBOARD FLAPS
D
Ball Screw Installation Figure 402 (Sheet 2)
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747-400 MAINTENANCE MANUAL
 (c)  
On the inboard flap tracks, remove the four bolts (10) washers (8 and 12) and nuts (11) that connect the gimbal caps (7) and the gimbal.

 (d)  
Remove the gimbal caps from the ball screw nut.

 (e)  
Move the ball screw aft, out of the universal joint. Remove the ball screw from the airplane.

 NOTE: Make sure that you hold the ball screw during the
____ removal. The ball screws at positions No. 1, 2, 7 and 8 weigh approximately 40 pounds. At positions No. 3 and 6 they weigh approximately 70 pounds. At positions No. 4 and 5 they weigh approximately 90 pounds.
 TASK 27-51-41-404-014
 3.  Ball Screw Installation_______________________
 A. Special Tools and Equipment
 (1)  
2MIT65B81117-1 Ball and Screw Support Tool

 (2)  
24ME65B00116 Inboard TE Flap Lock

 (3)  
23ME65B00116 Outboard TE Flap Lock

 B.
Consumable Materials

 (1)  
C00528 Compound - Soft Filmed (corrosion preventive), MIL-C-11796, Class 3

 (2)  
D00633 Grease - BMS 3-33 (recommended)

 (3)  
D00013 Grease - MIL-G-23827 (alternative)

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747-400
MAINTENANCE MANUAL

 C. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................
 | 401  |  1  | Bolt (Track No. 1 and 8)  | 27-51-33 |  03 |  70  |
　
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