(c)  
Alcohol - Denatured

(7)  
Use the materials that follow for the Akro Fireguard System:

(a)  Kits - quick setting epoxy adhesive, P/N 300-P, 3-2-P, or 306-P; Supplier: Akro Fireguard Protection, Inc.
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C.  Procedure - Repair the Cargo Liners with a Riveted and Bonded Fiberglass Patch
(1)  
Remove the cargo liner from the airplane (Ref 25-52-111/401, 25-52-121/401, or 25-52-131/401).

(2)  
Make a fiberglass patch with the same thickness as the liner being repaired.

NOTE:  The patch should make a minimum of a 2-inch overlap on the area that is not damaged. For example, the patch dimension that is necessary for a 1.5-inch diameter hole would be 5.5-inch diameter.

(3)  
Rub the back of the patch with abrasive paper.

(4)  
Clean all of the surfaces using denatured alcohol to remove the loose particles.

(5)  
Apply adhesive to the back of the patch.

(6)  
Put the patch over the center of the damaged area.

(7)  
Apply pressure to the patch to make sure there is a good bond.

(8)  
Put tape around the edges of the patch to protect the edges of the patch.

(9)  
Drill 0.20-inch diameter holes through the patch and the liner at approximately 1.5 inches apart and 0.50 inch from the edges of the patch.

NOTE: Control the depth of the drill to the thickness of the patch plus the liner.

(10)
Attach the patch permanently with cherry monel blind rivets or equivalent heat resistant fasteners.

(11)
Install the cargo liner if you removed it to do the repairs (Ref\25-52-111/401, 25-52-121/401, or 25-52-131/401).

D.  Procedure - Repair the Cargo Liners with Screws and a Bonded Patch
(1)  
Remove the cargo liner from the airplane (Ref 25-52-111/401, 25-52-121/401, or 25-52-131/401).

(2)  
Make a fiberglass patch with the same thickness as the liner being repaired.

NOTE:  The patch should make a minimum of a 2-inch overlap on the area that is not damaged. For example, the patch dimension that is necessary for a 1.5-inch diameter hole would be 5.5-inch diameter.

(3)  
Rub the back of the patch with abrasive paper.

(4)  
Clean all of the surfaces using denatured alcohol to remove the loose particles.

(5)  
Apply adhesive to the back of the patch.

(6)  
Put the patch over the center of the damaged area.

(7)  
Apply pressure to the patch to make sure there is a good bond.

(8)  
Attach the patch permanently with screws at approximately 1.25 inches apart and 0.50 inch from the edges of the patch.

(9)  
Apply tape on the heads of the screws to keep them installed through the fiberglass liner and patch.

(10)
Install the cargo liner if you removed it to do the repairs (Ref\25-52-111/401, 25-52-121/401, or 25-52-131/401).

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E.  Procedure - The Thermion Repair System
(1)  
Get the correct Thermion patch kit for the shape of the damage.

NOTE:  The patch should make a minimum of a 2-inch overlap on the area that is not damaged. For example, the patch dimension that is necessary for a 1.5-inch diameter hole would be 5.5-inch diameter.

(2)  
Rub the back of the patch with abrasive paper to remove the gloss being careful not to rub the impregnated scrim area.

(3)  
Use the abrasive paper to remove all signs of the tedlar on the area of the liner to be contacted by the patch.

NOTE:  Tedlar is a protective white layer that is on the liner during the manufacture process.

(4)  
Clean all of the surfaces using denatured alcohol to remove the loose particles.

(5)  
Apply epoxy to the back of the patch and to the liner.

(6)  
Put the patch over the center of the damaged area.

(7)  
Apply pressure to the patch to make sure there is a good bond.

(8)  
Put tape around the edges of the patch to hold the patch while the adhesive dries for approximately 30 minutes.

NOTE:  The tape will also protect the edges of the patch.
F.  Procedure - The Akro Fireguard System
(1)  
Get the correct Akro Fireguard repair patches for the shape of the damage.

NOTE:  The patch should make a minimum of a 2-inch overlap on the area that is not damaged. For example, the patch dimension that is necessary for a 1.5-inch diameter hole would be 5.5-inch diameter.
　
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