S 348-041
(3) Apply adhesive or cement to the damaged area and the patch.
NOTE: For blanket or cap strip assemblies, you can use a patch
____
of OT-5 tape, in an alternative repair.
S 348-159
(4)
Push the patch into the damaged area tighly to make sure there is a satisfactory bond.
S 348-160
(5)
Apply adhesive to velcro tapes if it is necessary to bond them to the blankets or covers.
F. Replace Insulation Blankets with Too Much Damage
NOTE: Use this procedure if the repair area is more than 25 percent
____
of the size of the blanket or cover.
S 028-044
(1)
Remove the damaged sidewall or ceiling blanket (Ref 25-21-04/401).
S 348-045
(2)
Make a new blanket with the steps that follow:
(a) Use the damaged blanket to make a paper template.
NOTE: Use the same quantity and thickness of layers for
____ the new blanket as there were in the damaged blanket.
(b)
Cut fiberglass insulation to the same shape as the template.
(c)
Put the layers of the fiberglass insulation between the inboard and outboard sides of the fabric covering.
(d)
Put a sheet of lead-coated fabric between the layers of the blanket if it is necessary.
NOTE: The lead-coated fabric must have 0.25-inch diameter
____ holes. If the insulation blanket width is less than 12 inches,there must be one hole for each 10-inch length of the blanket. If the blanket width is more than 12 inches, there must be two holes for each 10-inch length of the blanket.
(e) Cut the fabric covering and lead-coated fabric, if it is necessary.
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(f) Use a staple to connect the layers of the blanket to easily stitch and handle the blanket.
NOTE: The staples must be between the stitches and the
____ outer edge of the blanket. The staples must not show on the completed blanket. Make sure the staples go through the inboard and outboard covering and the fiberglass insulation only.
(g)
Stitch the blanket edges with stitches that are four to six stitches for each inch.
(h)
Close the edges and the cutouts of the blanket with fabric strips, with the steps that follow: 1) On edges with flaps, make the flaps the same width as the
damaged blanket. 2) On edges that need the same thickness for the whole blanket, use cement to attach the nylon binding. 3) On edges with a binding that is sewn, use 4-cord cotton thread with between four and six stitches for each inch. 4) Install nylon fabric grommets through the holes in the blanket. 5) Bond the grommets to the blanket with BMS 5-30 cement.
(i)
On ceiling panels, seal the stitching on the outboard side of the blanket with a continuous bead of BMS 5-30 cement.
NOTE: You can make the cement thin with MEK if it is
____
necessary.
TASK 25-00-00-308-183
11. Repair Aluminum Trim
_____________________
A. General
(1) This procedure gives instructions to repair aluminum trim.
B. Standard Tools and Equipment
(1) Heat Gun - 1200 to 1500 watts
C. Consumable Materials
(1) Adhesives
(a) A00028 Adhesive - BMS5-92, 3M 2216
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E.
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(b)
A00000 Adhesive - BMS5-123, Hysol 608
(c)
D00147 Filler - BMS 5-136, Ad Tech 15-3
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