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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36-11-01
ALL ú ú 02 Page 412 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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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A
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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