B. Procedure
S 012-002
(1)
Remove the ceiling panel to get access to the vent muffler.
S 022-003
(2)
Remove the vent muffler.
(3)
Push a wooden cylinder plug through the vent muffler.
S 142-004
NOTE: The plug diameter must be smaller than the orifice diameters
____
of the muffler.
S 142-005
(4) Push the plug through the ducts which connect to the vent muffler if it is necessary.
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21-23-17
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 422-006
(5)
Install the vent muffler.
S 412-007
(6)
Install the ceiling panel.
TASK 21-23-17-302-008
3. Vent Muffler Repairs
____________________
A. Consumable Materials
(1)
B00192 Solvent - BMS 3-2, Type I (AMM 20-30-31/201)
(2)
G02129 Tape, Vinyl - Permacel P29 (AMM 20-30-51/201)
B. Access
(1) Location Zones
104 Forward Galley
109 Aft Galley
C. Procedure
S 012-009
(1)
Remove the ceiling panel to get access to the vent muffler.
S 022-010
(2)
Remove the vent muffler.
S 112-011
(3)
Use the solvent, BMS 3-2, to clean the crack in the vent muffler.
S 362-012
(4)
Apply the vinyl tape to the crack.
NOTE: The tape must make a 2 inch overlap on all sides of the
____
crack.
S 422-013
(5)
Install the vent muffler.
(6)
Install the ceiling panel.
S 412-014
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A
737-300/400/500MAINTENANCE MANUAL
AIR CONDITIONING SYSTEM DUCTS - REPAIRS
_______________________________________
1. General_______
A. This procedure gives instructions for the repair of the following types of air conditioning ducts:
(1)
Fiberglass or Kevlar Duct (Fig. 201)
(a)
Taped Joint Repair
(b)
External Patch Repair
(c)
Structural Repair
(2)
Polyurethane Foam Duct (Fig. 202)
(a)
Taped Joint Repair
(b)
Duct End Repair
(c)
External Patch Repair
(d)
Structural Repair
(e)
Inner Lining Repair
(f)
Duct Section Replacement
(3)
Ducts with Polyimide Foam Insulation (Fig. 203)
(a)
Tape Replacement
(b)
Insulation Repair
(c)
Insulation Replacement
(4)
Ducts with Fiberglass Insulation and Flame-Resistant Covering (Fig. 204)
(a)
Tape Replacement
(b)
Insulation and Covering Repair
(c)
Duct Replacement
TASK 21-23-25-302-001
2. Taped Joint Repair - Fiberglass or Kevlar Duct (Fig. 201)______________________________________________
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