LEAD LAYER FABRIC (NOT USED IN ALL BLANKETS)
FIBERGLASS INSULATION
FABRIC COVER INBOARD INSULATION COVER
OUTBOARD
EDGE BINDING WITHOUT FLAP
INSULATION FABRIC COVER
Insulation Blankets Details
Figure 801 (Sheet 1)
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A 737-300/400/500MAINTENANCE MANUAL
EDGE COVER FOR FULL BLANKET
LEAD COATED FABRIC
THICKNESS ALONG EDGE (NOT USED IN ALL BLANKETS)
Insulation Blankets Details
Figure 801 (Sheet 2)
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A
737-300/400/500MAINTENANCE MANUAL
(b) All corners must be rounded.
S 358-004
(3) Apply the adhesive to the surfaces of the damaged area and repair with a patch.
(a) An alternative procedure for the blanket and cap strip assemblies, 1) You can use a patch of the tape (OT-5, OT-6, or OT-7 Orcon)
to repair the damaged (BMS 8-142) cover material.
S 358-005
(4) Tightly push the patch into the damaged area to make sure of a correct bond.
TASK 25-21-39-358-007
3. Extensive Damaged Insulation Blanket Repalcement (Fig. 801)___________________________________________________________
A. Consumable Materials
(1)
G00086 Insulation - Thermal-Acoustical Fiberglass, BMS 8-48, Type III, Class III (used in passenger cabin area)
(2)
G00060 Fabric - Lead Coated, BMS 8-47, Types I, III, and IV (This material is used inside blankets between layers of fiberglass in some areas of the passenger cabin.)
(3)
G00158 Thread - 4-String Cotton, Federal Specification V-T-276, Type 1B3, Ticket Nos. 16 and 24
(4)
A00153 Adhesive - Low-Odor Synthetic Rubber, BMS 5-30
(5)
B00148 Solvent - Methyl Ethyl Ketone, TT-M-261
(6)
Fabric - BMS 8-115 (Ref 20-30-51)
B. References
(1) 25-21-39/401, Sidewall and Ceiling Insulation
C. Access
(1) Location Zone
100 Upper Half of Fuselage
D. Procedure
S 028-008
(1)
Remove the damaged insulation blanket (Ref 25-21-39/401).
S 358-009
(2)
Prepare the New Insulation Blanket
(a)
Use the damaged blanket as an example to make a paper template.
(b)
Cut thermal-acoustical fiberglass insulation to the same shape as the template. 1) Use the same quantity and thickness of the layers as the
damaged blanket.
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(c)
(d)
(e)
(f)
(g)
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737-300/400/500MAINTENANCE MANUAL
Install the fiberglass insulation layers between the inboard
and outboard fabric covers.
1) When a fabric cover has a different surfaces,
a) Install the cover to have the same surface to the
fiberglass as the damaged blanket.If the damaged blanket contained the lead layer fabric, 1) Put a sheet of this material between the same insulation
layers as the damaged blanket.
NOTE: The lead layer fabric must have an 0.25-inch
____ diameter air holes. The blankets less than 12 inches in width must have one air hole through the lead layer fabric for each 10-inch length. The blankets more than 12 inches in width must have two air holes for each 10-inch length.
Cut the fabric cover and the lead layer fabric, if installed.
If it is necessary, attach the blanket edges (with staple) to
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