(b)
Wrap the insulation around the duct.
(c)
Install strips of 2-inch wide adhesive tape to the edges and seams of the insulation as shown in Figure 203 to hold it to the duct.
(d)
Make sure the adhesive tape overlaps all the edges and seams of the insulation by a minimum of 1-inch.
F. Put the Airplane Back to Its Usual Condition
S 412-209
(1)
Reinstall the duct.
S 412-210
(2)
Replace the panels or other airplane structure removed to gain access to the duct joint.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
INSULATION
FIBERGLASS INSULATED DUCT
(EXAMPLE)
COVER ALL EXPOSED INSULATION WITH CARGO LINER JOINT SEALER TAPE. CUT TAPE AS REQUIRED TO FIT AROUND AIR OUTLETS.
Air Conditioning System Insulated Duct Repair (Fiberglass) Figure 204
L29119
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. DUCTS WITH FIBERGLASS INSULATION AND ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
TASK 21-23-25-302-211
14. Tape Replacement - Duct with Fiberglass Insulation and Flame-Resistant
______________________________________________________________________ Covering (Fig. 204)
________
A. General
(1) This procedure gives instructions to replace old or loose adhesive tape on air conditioning ducts insulated with fiberglass insulation (BMS 8-48) and a flame-resistant covering (BMS 8-142) which has been wrapped with cargo liner joint sealing tape (BMS 5-146).
B. Consumable Materials
(1)
Tape - Cargo Liner Joint Sealing (BMS 5-146, Type I) (AMM 20-30-51/201)
(2)
Solvent - B01011, Series 91 - commercially available (AMM 20-30-91/201)
(3)
Wiping cloth, lint free - commercially available
C. References
(1) AMM 36-05-00/201, Pneumatic - General
D. Prepare for the Repair
S 862-212
(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 862-213
(2)
On the bleed air control module on the pilots' overhead panel, P5, put the pack control switches in the OFF position.
S 012-214
(3)
Remove the applicable ceiling, sidewall, or floor panels to gain access to the damaged air conditioning duct joint.
(4)
Remove the duct if needed for better access.
S 012-216
(5)
Remove all loose or old cargo liner joint sealing tape from the insulation/covering.
S 012-215
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 162-217
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.
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