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Use dimension B to find dimension D. ~.................................................... | Dimension B | Dimension D | ...................................................... | 0.00 to 0.89 inches | 1.00 | 0.10 inches | | (0.00 to 2.26 cm) | (2.54 | 0.25 cm) | ...................................................... | 0.90 to 1.19 inches | 0.87 | 0.10 inches | | (2.29 to 3.02 cm) | (2.21 | 0.25 cm) | ...................................................... | 1.20 to 1.44 inches | 0.75 | 0.10 inches | | (3.05 to 3.66 cm) | (1.91 | 0.25 cm) | ...................................................... | 1.45 to 1.60 inches | 0.38 | 0.10 inches | | (3.68 to 4.06 cm) | (0.97 | 0.25 cm) | 2......................….............................1

 (e)  
Add dimensions A and D to get the thickness of the snubber block and shims (Dimension C).

 (f)  
Use Dimension C to adjust the thickness of the shims.

 S 435-031
 (7)  
Install the snubber block and shims.

 (a)  
Install the snubber block and shims in the same position that you temporarily installed them.

 (b)  
Put the snubber block in the center of the aft roller in the longitudinal direction.

 S 715-032
 (8)  Move the flaps and make sure the fairing operates correctly. Make sure the fairing moves freely.
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 27-51-26
 ALL  ú ú 01 Page 509 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 865-040
 (9)
Put the flap control lever in the UP detent to retract the flaps.

 H.
Put The Airplane Back To Its Usual Condition

 S 865-033
 (1)
Release the pressure in hydraulic system No. 1 (Ref 29-11-00/201).

 S 015-034

 (2)
Install the access panels on the fairing as necessary:

 -563BB, 563CB, 563DB, and 563EB on track No. 3
 -561AB, 561BB, 561CB, and 561DB on track No. 4
 -661AB, 661BB, 661CB, and 661DB on track No. 5
 -663BB, 663CB, 663DB, and 663EB on track No. 6.
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 27-51-26
 ALL  ú ú 01 Page 510 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 INBOARD FLAP TRACK FAIRINGS - INSPECTION/CHECK
______________________________________________
 1.  General_______
 A.  This procedure contains one task, an inspection/check of the inboard flap track fairing. To do the check, you measure the inner and/or outer diameters of the parts which attach the flap track fairing. The parts include bushings, bearings and pins.
 B.  The inspection/check is usually done before a fairing is installed. The check must be done with the fairing removed from the airplane.
 TASK 27-51-26-206-005
 2.  Inboard Flap Track Fairings Inspection______________________________________
 A.  Standard Tools and Equipment
 (1)  
Micrometer - 0 to 1 inch (0 to 3 cm)

 (2)  
Micrometer - 1 to 2 inch (2 to 5 cm), To Measure Inside Dimensions

 (3)  
Vernier Caliper

 B.  
References

 (1)  
27-51-26/401, Inboard Flap Track Fairings

 (2)  
IPC 27-51-10, Fig. 2 (Flap Tracks No. 3 and 6)

 (3)  
IPC 27-51-11, Fig. 2 (Flap Tracks No. 4 and 5)

 (4)  
IPC 27-51-26, Fig. 2 (Fixed Fairings)

 C.  
Access

 (1)  
Location Zone 563 Outboard Flap Track Fairing, Inboard Flap, LH, (Track No. 3) 561 Inboard Flap Track Fairing, Inboard Flap, LH, (Track No. 4) 661 Inboard Flap Track Fairing, Inboard Flap, RH, (Track No. 5)

 663  Inboard Flap Track Fairing, Inboard Flap, RH, (Track No. 6)
 D.  Procedure
 S 026-001
 (1)  
Remove the inboard flap track fairing (Ref 27-51-26/401).

 S 226-002

 (2)  
Examine the parts which attach the inboard flap track fairing for worn areas.

 (a)  
　
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