S 128-040
(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.
S 168-041
(4)
Clean all of the surfaces using denatured alcohol to remove the loose particles.
S 348-042
(5)
Apply epoxy to the back of the patch and to the liner.
(6)
Put the patch over the center of the damaged area.
S 348-044
(7)
Apply pressure to the patch until the excess adhesive comes out from the edges.
S 348-043
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S 348-045
(8) Put the 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.
____
H. Procedure - The Akro Fireguard System
S 348-160
(1) Akro Fireguard System Instructions.
(a) 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.
(b) Use the Akro installation instructions to attach the patch over the center of the damage.
TASK 25-50-09-308-111
4. Repairs for Molded Panels, Shrouds, and Panels with Complex Curves
__________________________________________________________________
A. General
(1) The task that follows is a repair for molded panels, shrouds, and panels with complex curves.
B. Consumable Materials
(1)
A00904 Resin - Fiberglass, BMS 8-201, Type II
(2)
G01081 Abrasive paper (200 grit or finer)
(3)
G00316 Fiberglass Fabric - BMS 9-3, Type H
(4)
Solvent
NOTE: Use one of these:
____
(a)
B00316 Naphtha, Aliphatic - TT-N-95, Type I or II
(b)
B00775 Isopropyl Alcohol
C. References
(1)
AMM 25-50-01/401, Cargo Compartment Ceiling Lining
(2)
AMM 25-50-02/401, Cargo Compartment Sidewall Lining
(3)
AMM 25-50-03/401, Cargo Compartment Bulkhead Lining
(4)
SRM 51-70-03, Structural Repair Manual
D. Access
(1) Location Zones
121/122 Forward Cargo Compartment
153/154 Aft Cargo Compartment
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E. Procedure - Repair Molded Panels, Shrouds, and Panels with Complex Curves
S 038-112
(1)
Get access behind the panel or remove the panel from the airplane (AMM 25-50-01/401, AMM 25-50-02/401, or AMM 25-50-03/401).
S 128-113
(2)
Lightly rub the damaged area with abrasive paper on the two sides of the panel.
S 168-114
(3)
Clean the damaged area with solvent.
S 348-115
(4)
Do the structural repair on the fiberglass side of the panel (SRM 51-70-03).
S 348-116
(5)
Mix 100 parts by weight of Epocast 50-A resin to 15 parts by weight of Epocast No. 946 hardener (BMS 8-201, Type II).
S 348-117
(6)
Do the steps that follow to the front and the back of the panel:
(a)
Apply a layer of the mixed adhesive resin to the side of the damaged panel that shows in the cargo compartment.
(b)
Apply a layer of BMS 9-3, Type H, fiberglass fabric on the layer of adhesive resin.
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