S 358-104
 S 358-106
 TASK 25-00-00-308-038
 10. Repair of Insulation Blankets and Covers (Fig. 801, 802)
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747-400 MAINTENANCE MANUAL
CUT A SLIT IN THE ENDS OF THE TUBE AND CEMENT TO THE WASHER

INSULATION COVER
EDGE BINDING WITHOUT A FLAP STITCHING

COVEREDGE BINDING WITH A FLAP
Insulation Blankets Edge Binding and Grommet Installation Figure 801 (Sheet 1)
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MAINTENANCE MANUAL

FLAP (THE SAME WIDTH AS THE DAMAGED BLANKET)
STITCHING
FABRIC WITH A LAYER OF LEAD (NOT USED IN ALL BLANKETS) OUTBOARD INSULATION COVER

FIBERGLASS INSULATION
INBOARD INSULATION
OUTBOARD INSULATION COVER

FIBERGLASS INSULATION
INBOARD INSULATION COVER
EDGE BINDING FOR A JOINT THAT MAKES AN OVERLAP THAT NEEDS FULL BLANKET THICKNESS
Insulation Blankets Edge Binding and Grommet Installation Figure 801 (Sheet 2)
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MAINTENANCE MANUAL

EXAMPLE PROCEDURE TO ATTACH THE BLANKET ASSEMBLIES TO THE
STRUCTURE OR TO EACH OTHER WITH VELCRO TAPE

TRIM-EDGE WITH A TAB
SEAL THE GAP IN THE COVER WITH PERMACELINSULATION TAPE 621 AFTER YOU
STITCHING INSTALL THE BLANKET

4.00 INCHES
VELCRO HOLE DIAMETER AS 2.00 INCHES
TAPE NECESSARY TO CLEAR(EXAMPLE)THE SYSTEM RUN
BLANKET OPENINGS FOR SYSTEM (TUBING, ETC)
MAKE THE FASTENER TAB FROM THE INBOARD AND
OUTBOARD COVER, PLUS ONE LAYER OF BMS 8-115

Insulation Blankets Edge Binding and Grommet Installation
Figure 801 (Sheet 3)

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747-400 MAINTENANCE MANUAL
FOLD BACK THE EDGE
OF THE TRIM APPROX
45` & STITCH
AS SHOWN

OUTBOARDSTITCHING

COVER

GROMMET
CUTOUT GROMMET
OR SLOT
OR SLOT

CUTOUT
MAKE AN OVERLAP (OPTIONAL)
TRIM EDGE BONDED TRIM EDGE STITCHED
CUTOUT OR SLOT
2 CUTOUT OR SLOT
MAKE AN

INSULATION BLANKET
GROMMET B
B A INBOARD

2 WASHERS NECESSARY
COVER
A-A

FOR EACH GROMMET
3
D
D

MAKE AN OVERLAP OF
0.44 |0.06 INCH B
B
C

BOND ONE TUBE NECESSARY FOR EACH GROMMET
3 B-B

USE COTTON THREAD WITH FOUR CORDS TO  SIX-POINTED STAR CUTOUT NEEDED IN THE 
MAKE 5|1 STITCHES FOR EACH INCH  CENTER OF EACH WASHER OR DIMENSION "A" 
BONDING MATERIAL BMS 5-30  HOLE IN THE CENTER 
SEE TABLE 1 FIG. 803 FOR THE DIMENSIONS OF A,B,C,D AND GROMMET PART NO.  EACH END OF THE TUBE SIX EQUALLY SPACED SLITS ARE NECESSARY ON

Insulation Blanket Repair
Figure 802 (Sheet 1)

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