27-51-22
 ALL  ú ú 01 Page 406 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 034-005
 (1)  
Remove the safety strap (Fig. 401):

 (a)  
Remove the bolt and the nut.

 (b)  
Remove the inner and the outer parts of the safety strap.

 (c)  
Remove the hook.

 S 034-006
 (2)  
Disconnect the tension tie from the link:

 (a)  
Remove the bolt, washers, bushing, and nut.

 (b)  
Move the link away from the tension tie.

 S 024-007
 CAUTION:_______MAKE SURE THAT THE FLAP TRACK DOES NOT TURN. THIS CAN CAUSE DAMAGE TO THE PIN.
 (3)  
Remove the flap track:

 (a)  
Remove the four bolts, nuts, washers, and the ring springs.

 (b)  
Use the spanner wrench adapters to remove the fuse bolt, lock washer, washers, and fuse bolt nut from the flap track.

 (c)  
Disengage the pin from the bearing.

 (d)  
Lower the flap track from the airplane.

 S 034-009
 (4)  Remove the bearing from the track.
 TASK 27-51-22-404-010
 3.  Inboard Flap Inboard Track Installation (Fig. 401)_______________________________________
 A. Special Tools and Equipment
 (1)  
ST2580-267-26 Spanner Wrench Adapter

 (2)  
ST2580-429 Spanner Wrench Adapter

 (3)  
G27019-(33) Flap Track Sling (Preferred)

 (4)  
G27019-(1) Flap Track Sling (Optional)

 (5)  
Load Positioner - LL-5-3, Permadur, Box 1032,
 Somerville, New Jersey 08876

 B.
Consumable Materials

 (1)  
D00633 Grease - BMS 3-33 (recommended)

 (2)  
D00013 Grease - MIL-G-23827 (alternative)

 (3)  
D00015 Grease - Corrosion Preventive, BMS 3-24

 (4)  
A00247 Sealant - Chromate, BMS 5-95, Class B

 (5)  
C00259 Enamel - Primer, Green, BMS 10-11

 (6)  
C00032 Enamel - Exterior, Decorative, Protective, BMS 10-60, Type I

 C.
References

 (1)  
AMM 07-11-01/201, Jacking Airplane

 (2)  
AMM 27-51-01/401, Inboard Flap

 (3)  
AMM 27-51-24/401, Inboard Foreflap Carriage and Toggle

 (4)  
AMM 27-51-33/401, Transmission

 (5)  
IPC 57-22-53, Fig. 5

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-51-22
 ALL  ú ú 03 Page 407 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 D. Access
 (1)  Location Zone
 561 Inboard Flap Track Fairing, Inboard Flap, LH
 (Track No. 4)

 661  Inboard Flap Track Fairing, Inboard Flap, RH (Track No. 5)
 E. Procedure
 S 214-022
 (1)  
Examine the parts which attach the inboard flap inboard track for worn areas (AMM 27-51-22/601).

 S 434-011

 (2)  
Install the foreflap carriage stop, if it is necessary.

 (a)  
Apply a layer of sealant to the flap track and the stop.

 (b)  
Put the stop in its position on the flap track.

 (c)  
Apply a layer of sealant to the threads, shank and head of the bolts.

 (d)  
Install the bolts, washers and the nuts.

 (e)  
Tighten the bolts to 510-650 pound-inches.

 (f)  
Stop for a minimum of 20 minutes, then tighten the bolts to 510-650 pound-inches (58-73 N-m).

 (g)  
Apply a layer of sealant to the bolt heads.

 S 434-012
 (3)  
Install the bearing in the flap track.

 S 424-013

 (4)  
Install the flap track:

 (a)  
Apply a layer of BMS 3-33 grease between the surfaces of the flap track, bearing plate, and the wing structure.

 (b)  
Put the flap track into its position on the airplane. 1) Use the flap track sling to lift the flap track into its

 position. 2) Engage the bearing with the pin. 3) Align the fuse bolt hole and the flap track fitting.
　
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