(2)
B00083 Solvent - Aliphatic Naphtha, TT-N-95
(3)
B00168 Paper - Abrasive, 400-600 grit
(4)
G00034 Cheescloth - Lint-free
(5)
G00077 Foam - BMS 8-133
(6)
G00129 Fabric - Woven prepreg glass, BMS 9-3
(7)
G00368 Tape - Mylar, Permacel No. 92
D. References
(1) AMM 20-10-26/201, Heat Guns, Soldering Guns, and/or Soldering Irons
E. Access
(1) Location Zone
200 Upper Half of the Fuselage
F. Repair Small Scratches and Dents
NOTE: Use this procedure to repair panels that have damage that does
____
not go into the fiberglass or carbon skins.
For panels that are 0.25-inch thick or more, use this procedure to repair scratches and small surface dents that are not more 0.01-inch deep. For panels that are less than 0.25-inch thick, use this procedure to repair scratches and small surface dents that are not more than 0.005-inch deep.
S 348-004
(1)
Fill the damaged area with BMS 5-136 filler to make a crown above the adjacent area.
S 348-005
(2)
After the filler is hard, rub it with abrasive paper to the same level as the surface of the panel.
S 348-006
(3)
If this is a decorative panel, do the procedure to repair the decorative surface.
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G. Repair Large Dents in Crushed-Core Panels
NOTE: This procedure is for panels less than 0.25 inch thick with
____
dents that are more than 0.005-inch deep.
S 888-007
CAUTION: BE CAREFUL WHEN YOU APPLY HEAT NEAR MATERIALS THAT CAN BURN.
_______ THE TEMPERATURE OF THE TEDLAR MUST NEVER BE MORE THAN 200°F OR THE TEMPERATURE AT WHICH THE TEDLAR DISTORTS, WHICHEVER IS LOWER. TOO MUCH HEAT CAN CAUSE DAMAGE TO THE TEDLAR.
(1) On the side that does not have dents, increase the temperature of the panel. Use a standard 1200- to 1500-watt handgun, until the panel is approximately 200°F.
NOTE: The area of the panel will get more flexible, and very
____ hot. Refer to AMM 20-10-26/201 for cautions to obey when you use heat guns.
S 348-008
(2)
Push the backside of the panel forward with the round surface of a tool to remove as much of the dent as you can.
S 348-009
(3)
After the panel is cool, do the procedure to repair small scratches and dents, if it is necessary.
H. Repair Small Holes and Gouges
NOTE: Use this procedure for damage that is less than 0.5 square
____
inch and goes through the face sheets, but not into the
fiberglass.
S 348-010
(1) Remove loose and broken pieces, contamination, and other unwanted material from the hole.
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S 118-011
(2)
Clean the area with a cheesecloth that is soaked with naphtha.
S 118-012
(3)
Dry the area with a clean cheesecloth.
S 348-013
(4)
Use the manufacturer's instructions to mix the Epocast 1618A/B.
S 348-014
(5)
Fill the hole with the adhesive mixture (Epocast).
S 348-015
(6)
Let the compound cure for 7 days at 75-79 degrees F, or 5 hours at 120-130 degrees F.
S 348-016
(7)
Rub the area with the abrasive paper until the compound is at the same level as the adjacent surface.
S 348-017
(8)
If it is a decorative panel, do the procedure to repair the decorative surface.
I. Repair Panels that do not have Core Damage
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