21-23-25
ALL ú ú 01 Page 235 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
NOTE: This will make sure that there is no airflow in the ducts
____
when you do the repair.
S 862-195
(2)
On the bleed air control module on the pilots' overhead panel, P5, put the pack control switches in the OFF position.
S 012-196
(3)
Remove the applicable ceiling, sidewall, or floor panels to gain access to the damaged air conditioning duct joint.
S 012-197
(4)
Remove the duct if needed for better access.
S 162-198
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM THE SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(5) Use the solvent and a wiping cloth to clean the surface of the insulation around the damaged area.
E. Repair the Damaged Insulation
S 412-199
(1) Apply a minimum 2-inch wide patch of adhesive tape (BMS 5-149) to completely cover the damaged area on the insulation.
(a) Make sure to apply a large enough patch to assure full coverage of the damaged area with a minimum 1/2-inch overlap.
F. Put the Airplane Back to Its Usual Condition
S 412-200
(1)
Reinstall the duct (if removed).
S 412-201
(2)
Replace the panels or other airplane structure removed to gain access to the duct joint.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-23-25
ALL ú ú 01 Page 236 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
TASK 21-23-25-212-202
13. Insulation Replacement - Duct with Polyimide Foam Insulation (Fig. 203)
____________________________________________________________
A. General
(1) This procedure gives instructions to replace the insulation on air conditioning ducts with Polyimide foam insulation (BMS 8-300).
B. Consumable Materials
(1)
Insulation - Polyimide Foam (BMS 8-300)
(2)
Tape - Pressure sensitive adhesive (BMS5-149, Type XI, Class 1, Grade C)
(a) Product Designation 78-C or 70-1C
E & H Laminating and Slitting Co.
138 Grand Street
Paterson, NJ 07501
(3)
Solvent - B01011, Series 91 - commercially available (AMM 20-30-91/201)
(4)
Wiping cloth, lint free - commercially available
C. References
(1) AMM 36-05-00/201, Pneumatic - General
D. Prepare for the Repair
S 862-203
(1) Release the pressure from the pneumatic system (AMM 36-05-00/201).
NOTE: This will make sure that there is no airflow in the ducts
____
when you do the repair.
S 862-204
(2)
On the bleed air control module on the pilots' overhead panel, P5, put the pack control switches in the OFF position.
S 012-205
(3)
Remove the applicable ceiling, sidewall, or floor panels to gain access to the damaged air conditioning duct joint.
(4)
Remove the duct to permit removal of the insulation.
S 012-207
(5)
Remove all tape and existing insulation from the duct.
S 012-206
E. Install the Insulation
S 412-208
(1) Do these steps to install a new section of Polyimide foam insulation (BMS 8-300) around the duct:
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-23-25
ALL ú ú 01 Page 237 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON
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