TASK 36-11-01-004-033
 6. Duct Section with a Rigid Joint Removal (Fig. 402)
_______________________________________
 A. References
 (1)  
AMM 27-81-00/201, Leading Edge Flap System

 (2)  
AMM 36-00-00/201, Pneumatic System

 B. Prepare to Remove the Duct Section
 S 864-034
 (1)  
Release the pressure from the pneumatic system (AMM 36-00-00/201).

 S 864-035

 (2)  
If it is necessary, extend the leading edge flaps of the wing (AMM 27-81-00/201).

 (3)
Remove all of the duct support equipment from the duct section.

 (4)  
Loosen the clamp nut.

 (5)  
Remove the V-band couplings.

 S 024-038

 (6)  
Remove the duct section.

 (a)  
Remove and discard the E-seals or gaskets.

 (7)  
Put a cover on each open duct section to keep out unwanted objects.

 S 014-036
 S 034-037
 S 034-051
 S 034-039
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A
747-400 MAINTENANCE MANUAL
 TASK 36-11-01-404-040
 7.  Duct Section with a Rigid Joint Installation (Fig. 402)____________________________________________
 A. References
 (1)  
AMM 27-81-00/201, Leading Edge Flap System

 (2)  
AMM 36-00-00/201, Pneumatic System

 B.
Install the Duct Section

 S 214-041
 (1)  
Make sure that the new duct section and the adjacent duct sections do not contain unwanted objects.

 S 434-042

 (2)  
Install a gasket or an E-seal in the duct flange.

 S 424-043

 (3)  
Put the duct section in the correct position.

 (a)  
Hold the duct section in its position with a V-band coupling clamp.

 S 434-044
 (4)  Tighten the V-band coupling clamp to 70-80 pound-inches (7.9-9.0 N.m).
 TASK 36-11-01-364-060
 8.  Duct Section with a Flexible Joint Removal (Fig. 402)__________________________________________
 A. References
 (1)  
AMM 06-09-08/201, Wing Access Doors And Panels

 (2)  
AMM 27-81-00/201, Leading Edge Flap System

 (3)  
AMM 36-00-00/201, Pneumatic System

 (4)  
AMM 71-11-06/201, Core Cowl Panels

 (5)  
AMM 78-31-00/201, Thrust Reverser System

 B.
Prepare to Remove the Duct Section

 (1)  
Release the pressure from the pneumatic system (AMM 36-00-00/201).

 S 864-063

 (2)  
Gain access to applicable duct sections; open engine cowl panels or fan reverser assemblies, remove access panels or extend leading edge flaps as applicable (AMM 71-11-06/201, 78-31-00/201, 06-09-08/201, 27-81-00/201).

 S 864-062
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747-400
MAINTENANCE MANUAL

 S 014-064
 (3)  
Remove all the duct support hardware or antirotation springs which may be attached to the flexible joint retainer assemblies.

 S 014-065

 (4)  
Remove the T-bolt which secures the low profile retainer.

 S 014-066

 (5)  
Open the retainer halves and remove retainer.

 S 034-067

 (6)  
Support the duct section to be removed.

 (a)  
Slide the seal sleeve axially along the duct until the two seals are exposed.

 S 024-068
 (7)  
Remove the duct section.

 S 034-069

 (8)  
Put a cover on each open duct section to keep out unwanted objects.

 S 034-128

 (9)  
Remove the seals from the ducts and discard seals.
　
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