VELCRO TAPE SEAL END RIB  FOREFLAP 
RUBBING STRIP 
MIDDLE BAFFLE (EXAMPLE) THE BELLOWS TO THE FASTNER THAT CONNECTS  MIDFLAP  AFTFLAP 
FOREFLAP 
VELCRO TAPE  FWD  INBD 

FASTENERS THAT CONNECT
THE BELLOWS TO THE
MIDDLE BAFFLES

BELLOWS
MIDFLAP
Inboard Trailing Edge Flap Seals Installation Figure 801 (Sheet 1)
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A
747-400
MAINTENANCE MANUAL

Inboard Trailing Edge Flap Seals Installation
Figure 801 (Sheet 2)

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747-400 MAINTENANCE MANUAL
 S 918-052
 (1)  
Cut a patch of the same material that is used on the bellows. S 118-006

 (2)  
Clean the surface around the tear with solvent. S 168-053

 (3)  
Rub the surface around the tear until it is dry. S 348-007

 CAUTION:_______DO NOT CATCH AIR IN THE MATERIAL. IF AIR IS CAUGHT IN THE MATERIAL, THEN THE SEAL MAY BE UNSATISFACTORY.

 (4)  
Apply the adhesive to the full patch surface over the tear.

 NOTE:____Use the vendor's instructions to prepare the adhesive. Do not catch air in the material.
 S 358-008
 (5)  Whip-stitch the edges with thread. NOTE: Put a knot after every three stitches.____
 S 888-054 WARNING:_______DO NOT USE TOO MUCH HEAT TO CURE THE PATCH. TOO MUCH HEAT CAN CAUSE A FIRE. CAUTION: MAKE SURE THE HEAT IS APPLIED SMOOTHLY AND THE TEMPERATURE
_______ DOES NOT EXCEED 120°F. IF THE HEAT IS NOT APPLIED SMOOTHLY AND IS ABOVE 120°F, THEN THE BOND CAN BECOME WEAK.
 (6)  If the ambient temperature is low, then increase the temperature of the repaired area to help curing.
 NOTE: A cure time of one hour is necessary at 70°F.
____
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747-400 MAINTENANCE MANUAL
 TASK 57-52-01-808-012
 4.  Replace Bellows_______________
 A. Access
 (1)  Location Zones
 576 Inboard Flap Foreflap, Left
 577 Inboard Flap Midflap, Left
 578 Inboard Flap Aftflap, Left
 676 Inboard Flap Foreflap, Right
 677 Inboard Flap Midflap, Right
 678 Inboard Flap Aftflap, Right

 B. Procedure
 S 038-055
 (1)  
Do the Prepare for the Repair of the Seals procedure.

 S 028-016

 (2)  
Remove the aft flap seal bellows.

 (a)  
Remove the fasteners from the edge of the aftflap closure rib and the seal end rib.

 (b)  
Remove the retainer strips.

 (c)  
Divide the velcro tape that holds the seal in position.

 S 428-017
 (3)  Install aftflap seal bellows
 (a)  
Put the bellows seal into its position.

 (b)  
Attach the velcro tapes to keep the bellows seal in its position.

 (c)  
Install the retaining strips with fasteners around the edge of the seal.

 S 028-018
 (4)  Remove midflap seal bellows.
 (a)  
Remove the fasteners from around the edge of the midflap closure rib and the seal end rib.

 (b)  
Remove the retainer strips.

 (c)  
Divide the Velcro tape that holds the bellows seal in its position.

 (d)  
Loosen the fasteners from around the edge of the two inner baffles to release the bellows.
　
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