27-51-22
 ALL  ú ú 01 Page 802 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 INBOARD FLAP CARRIAGE - REMOVAL/INSTALLATION
____________________________________________
 1.  General_______
 A.  There are two tasks in this procedure. There is one task for the removal and one task for the installation of an inboard flap carriage. The procedure has these parts.
 (1)
The removal of the inboard flaps

 (2)
The removal of the carriage

 (3)
An examination of the carriage for worn areas.

 (4)
The installation of the carriage

 (5)
The installation of the inboard flaps.

 TASK 27-51-23-004-001
 2.  Inboard Flap Carriage Removal_____________________________
 A.  Special Tools and Equipment
 (1)
12ME65B02000 Main Carriage Retainer Nut Wrench (Preferred)

 (2)  
5ME65B02000 Main Carriage Retainer Nut Wrench (Optional to 12ME65B02000)

 (3)
10ME65B02000 Inboard Flap Bearing Removal Tool

 (4)
5OHME65B02000 TE Flap Main Carriage Sling

 B.  
References

 (1)
27-51-01/401, Inboard Flap

 (2)
27-51-39/401, Inboard Aftflap Drive Mechanism

 (3)
IPC 27-51-06, Fig. 1

 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  Outboard Flap Track Fairing, Inboard Flap, RH (Track No. 6)

 (2)
Access Doors

 (a)  
On the left wing: 577AT Midflap Inbd Trailing Edge Flap Carriage 577BT Midflap Inbd Trailing Edge Flap Carriage 577CT Midflap Inbd Trailing Edge Flap Carriage 577DT Midflap Inbd Trailing Edge Flap Carriage 577ET Midflap Inbd Trailing Edge Flap Carriage 577FT Midflap Inbd Trailing Edge Flap Carriage

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-51-23
 ALL  ú ú 01 Page 401 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (b)  
On the right wing: 677AT Midflap Inbd Trailing Edge Flap Carriage 677BT Midflap Inbd Trailing Edge Flap Carriage 677CT Midflap Inbd Trailing Edge Flap Carriage 677DT Midflap Inbd Trailing Edge Flap Carriage 677ET Midflap Inbd Trailing Edge Flap Carriage 677FT Midflap Inbd Trailing Edge Flap Carriage

 D.
Procedure

 S 014-002
 (1)  
Remove the inboard flaps (Ref 27-51-01/401).

 S 014-003

 (2)  
Remove the aftflap geneva cam and the aftflap operating mechanism (Ref 27-51-39/401).

 S 014-004

 (3)  
Remove the access doors 577AT, 577BT, 577CT, 577DT, 577ET, 577FT (on the left wing) or 677AT, 677BT, 677CT, 677DT, 677ET, 677FT, (on the right wing) from the top surface of the midflap.

 S 024-005

 (4)  
Remove the inboard flap carriage (Fig. 401)

 (a)  
Remove the bolt which attaches the failsafe link to the carriage.

 (b)  
Hold the carriage in its position.

 NOTE: Hold the carriage to make sure there is no force on the
____
 thrust bearing or link.

 (c)  
Remove the nut and washers which hold the carriage in the link.

 (d)  
Remove the lockbolt from the retainer nut.

 (e)  
Remove the locknut and the retainer from the retainer nut.

 (f)  
Put a screwdriver blade between the end of the lug on the carriage spindle and the end of the retainer collar antirotation lug (Detail C, Fig. 401).

 NOTE: The retainer collar must not turn while the retainer nut
____
 is loosened.

 (g)  
Loosen and remove the retainer nut from the retainer collar. Use a main carriage retainer nut wrench.

 (h)  
Loosen the retainer collar from the carriage.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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