21-23-25
AIR DUCTS ú
ú 06 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 402Mar 15/98
A
737-300/400/500MAINTENANCE MANUAL
OVERHEAD DISTRIBUTION DUCT
SEE C
TO LAVATORY AND GALLEY
LIGHT ENTRY OVERHEAD SIDEWALL OUTLETS BSEE
MAIN CABIN SUPPLY RISERS
MIX MANIFOLD MAIN DISTRIBUTION MANIFOLD
DISTRIBUTION DUCT FLIGHT COMPARTMENT FLEXIBLE DUCTS
SIDEWALL OUTLET (EXAMPLE) OUTLET TO GASPER
GRILL
MOUNTING CLIPS SIDEWALL OUTLET
CABIN WINDOW (REF)
SIDEWALL OUTLET B Passenger Cabin Overhead Duct Installation Figure 401 (Sheet 2)
E85462
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21-23-25
AIR DUCTS ú
ú 02 Page 403
ú Mar 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
LAVATORY AND PINS AND CLAMP GALLEY DUCTS (EXAMPLE)
MAIN DISTRIBUTION DUCT
DUCT SEGMENT SEE D
ASSEMBLY
TIE STRAP (EXAMPLE)
TIE ROD
(6 LOCATIONS)
FLEX HOSE
(EXAMPLE)
SIDE RISER DUCTS (2 LOCATIONS)
TAPE
CLAMP
(EXAMPLE)
(3 LOCATIONS)
OVERHEAD ENTRY
OVERHEAD DISTRIBUTION DUCT
LIGHT
C
BOLT DUCT SEGMENTWASHER ASSEMBLY
WASHER
NUT
(2 LOCATIONS)
TIE TIE
STRAP STRAP
MAIN DISTRIBUTION DUCT
CEILING PANEL
D
Passenger Cabin Overhead Duct Installation
Figure 401 (Sheet 3)
E85498
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH ROUND ú
21-23-25
AIR DUCTS ú
ú 05 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 404Mar 15/98
A
737-300/400/500MAINTENANCE MANUAL
FLEXIBLE
PAPER BOARD SHOULD BE THIN TO PROVIDE MAXIMUM FLEXIBILITY WITHOUT DAMAGE.
BOND THE TYGON TUBING (OR EQUIVALENT) TO THE PAPER BOARD.
MAKE THE WIDTH OF THE PAPER BOARD A MINIMUM OF 1 INCH WIDER THAN THE WIDTH
OF THE TAPE USED FOR THE REPAIR.
MAKE THE LENGTH OF THE PAPER BOARD A MINIMUM OF 12 INCHES LONGER THAN THE
WIDTH OF THE DISTRIBUTION DUCT JOINT TO BE RETAPED.
Distribution Duct Taped Joints Installation Tool Figure 402
F87348
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21-23-25
ALL ú ú 08 Page 405 ú Nov 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 034-007
(6) Remove the fasteners or the clamps which hold the duct brackets to the ducts and the ceiling supports.
NOTE: Keep the isolators with the fasteners for the subsequent
____
installation of the duct.
S 024-008
(7) Remove the duct.
TASK 21-23-25-404-009
3. Overhead Distribution Duct Installation (Fig. 401)
_______________________________________
A. Equipment
(1) Tape Installation Tool
(a) Make the tape installation tool that is shown in Figure 402.
NOTE: The purpose of this tool is to make the installation
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