28-22-36
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
4) Disconnect the coupling nut for the flexible fuel-feed line.
NOTE: When you open the fuel line, a small quantity of
____ fuel will drain from the drain mast of the APU shroud.
(b) AIRPLANES WITHOUT BELLOWS ON THE APU SHROUD; Do these steps to disconnect the fuel line: 1) Put a container below the drain mast for the APU shroud to
catch fuel. 2) Loosen the flexible fitting until it is against the ferrule on the shroud. 3) Disconnect the coupling nut for the fuel line from the center tank fitting.
NOTE: When you open the fuel line, a small quantity of
____ fuel will drain from the drain mast for the APU shroud.
4) Remove the snap ring.
5) Engage the flexible fitting again and tighten it.
6) Move the fuel line and the shroud out of the interior of
the flexible fitting. 7) Remove the O-ring from the shroud and discard it.
(c)
Open the access door, 3701, for the stabilizer trim
(Ref 12-31-00/201) to get access to the aft shroud.
(d)
Remove the bolt that attaches the bonding jumper to "section 1" of the aft shroud.
(e)
Remove the bolts that attach "section 1" of the aft shroud to the pressure bulkhead (View C, Fig. 401).
(f)
Remove the bolts that attach the support clamps for the aft shroud to the pressure bulkhead (two locations).
(g)
Pull "section 1" of the aft shroud away from the pressure bulkhead.
(h)
Pull the flexible fuel line to the aft end of the tail cone area to move it away from the main shroud.
(i)
Make loops in the flexible fuel line to keep it in the tail cone area.
S 034-003
(4) Remove the bolts that attach the flexible shroud to the main shroud (View A, Fig. 401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 034-004
(5)
Remove the support clamps for the shroud (24 locations) (View B, Fig. 401).
S 024-005
(6)
Do these steps to remove the main shroud from the floor beams:
(a)
Pull the main shroud forward.
(b)
Turn the main shroud until it is clear of the control cables.
(c)
Lift the main shroud until it is clear of the floor panels.
S 024-006
(7) Remove the shroud from the airplane through the aft door.
TASK 28-22-36-404-007
3. Main APU Fuel Feed Line Shroud Installation___________________________________________
A. Standard Tools and Equipment
(1) Source - Air Pressure, 10 psi maximum
B. References
(1)
12-31-00/201, Access Doors and Panels
(2)
24-22-00/201, Manual Control
(3)
25-27-15/401, Carpets
(4)
53-21-00/401, Passenger Cabin Floors
C. Access
(1)
Location Zones
108 Aft Half of Cabin
218 Aft Cargo Compartment
220 Aft Cargo Compartment Equipment Bay
(2)
Access Panel
3804 APU Cowl Door
D. Procedure
S 424-008
(1)
Do these steps to put the main shroud in the correct position.
(a)
Put the main shroud through the aft door.
(b)
Move the shroud in the aft direction through the floor beams.
(c)
Turn the forward part of the shroud until it is clear of the control cables.
(2)
Install a new O-ring on the aft end fitting of the main shroud.
S 434-009
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