27-51-23
 ALL  ú ú 01 Page 402 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

SEE A
SEE B
MIDFLAP
CARRIAGE
A
BOLT AFT LINK
COTTER PIN HOLE
CASTELATED NUT
WASHER COLLAR
REPAIRED THREAD END
AFT LINK  THRUST COLLAR  AFT LINK 
BEARING  BEARING 
WITH  WITHOUT 
SHOULDER  SHOULDER 

0.05 INCH
CARRIAGE  (1.3 mm) RADIUS
B-B
Inboard Flap Carriage Installation Figure 401 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
ACCESS PLATES FAIL-SAFE LINK
A
LINK B
A
CARRIAGE B MIDFLAP
NUTSEE C
WASHER
B
PUT A SCREWDRIVER BLADE HERE WHILE THE RETAINER NUT IS TIGHTENED
RETAINER NUT
RETAINER NUT
RETAINER
CARRIAGE
COLLAR
LOCKBOLT
BOLT
CARRIAGE

RETAINER
LOCKNUT
LUG
ANTIROTATION LUG
LUG
SPACER THRUST BEARING
RING
RETAINER
PUT A SCREWDRIVER BLADE COLLAR
HERE WHILE THE RETAINER NUT IS LOOSENED A-A
C
Inboard Flap Carriage Installation
Figure 401 (Sheet 2)

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A
747-400 MAINTENANCE MANUAL
 (i)  Move the retainer collar and the retainer nut aft.
 CAUTION: MAKE SURE THAT THE CARRIAGE IS HELD CORRECTLY DURING THE
_______ REMOVAL. THE CARRIAGE WEIGHS APPROXIMATELY 300 POUNDS (130 KG). THE CARRIAGE CAN CAUSE DAMAGE.
 (j)  
Use a bearing removal tool to move the carriage out of the link bearing and the thrust bearing. Remove the retainer collar and the retainer nut while you move the carriage out of the link.

 (k)  
Remove the spacer ring from the carriage and keep it if you will install a new carriage.

 TASK 27-51-23-404-006
 3. Inboard Flap Carriage Installation (Fig. 401)
__________________________________
 A. Special Tools and Equipment
 (1)  
12ME65B02000 Main Carriage Retainer Nut Wrench

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

 (3)  
10ME65B02000 Inboard Flap Removal Tool

 (4)  
5OHME65B02000 TE Flap Main Carriage Sling

 B.
Consumable Materials

 (1)  
A00247 Sealant - BMS 5-95

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

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

 C.
References

 (1)  
27-51-01/401, Inboard Flap

 (2)  
27-51-23/601, Inboard Flap Carriage

 (3)  
27-51-39/401, Inboard Aftflap Drive Mechanism

 (4)  
IPC 27-51-06, Fig. 1

 D.
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)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (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
　
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